{"id":15163,"date":"2026-06-30T06:00:00","date_gmt":"2026-06-30T10:00:00","guid":{"rendered":"https:\/\/cov19longhaulfoundation.org\/?p=15163"},"modified":"2026-06-17T08:33:09","modified_gmt":"2026-06-17T12:33:09","slug":"covid-19-and-loss-of-sensory-motor-function","status":"publish","type":"post","link":"https:\/\/cov19longhaulfoundation.org\/?p=15163","title":{"rendered":"COVID-19 and Loss of Sensory-motor Function"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Loss of sensory-motor function affecting the hands, arms, legs, and feet has become one of the more disabling neurological manifestations reported after acute COVID-19 infection. The condition is usually not caused by a single disease process; rather, it reflects a spectrum of neurological injuries involving peripheral nerves, small nerve fibers, nerve roots, spinal cord pathways, autonomic nerves, skeletal muscle, microvasculature, and central nervous system networks.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Incidence and Prevalence<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Neurological symptoms occur in approximately 30\u201370% of individuals with long COVID, depending on the population studied. Peripheral neuropathic symptoms (numbness, tingling, burning, weakness, sensory loss) are reported in roughly 10\u201340% of long-COVID patients. Studies from the National Institutes of Health RECOVER program and other cohorts have identified persistent sensory disturbances and weakness among the most common disabling neurological sequelae.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common manifestations include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Distal numbness of the feet<\/li>\n\n\n\n<li>Loss of proprioception (position sense)<\/li>\n\n\n\n<li>Reduced grip strength<\/li>\n\n\n\n<li>Difficulty manipulating objects<\/li>\n\n\n\n<li>Impaired balance<\/li>\n\n\n\n<li>Leg weakness<\/li>\n\n\n\n<li>Gait instability<\/li>\n\n\n\n<li>Foot-drop<\/li>\n\n\n\n<li>Difficulty rising from a chair<\/li>\n\n\n\n<li>Fine motor impairment of the hands<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In severe cases, patients may require canes, walkers, wheelchairs, or full-time assistance.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Pathophysiology<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Several mechanisms appear responsible:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Small Fiber Neuropathy<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Damage to unmyelinated and thinly myelinated nerve fibers produces:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Burning pain<\/li>\n\n\n\n<li>Numbness<\/li>\n\n\n\n<li>Temperature sensation loss<\/li>\n\n\n\n<li>Autonomic dysfunction<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Skin biopsy studies have demonstrated reduced nerve fiber density in many long-COVID patients.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Immune-Mediated Neuropathy<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">COVID may trigger:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chronic inflammatory demyelinating polyneuropathy (CIDP)<\/li>\n\n\n\n<li>Guillain-Barr\u00e9 syndrome<\/li>\n\n\n\n<li>Autoimmune neuropathies<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These disorders can produce profound weakness and sensory loss.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Microvascular Injury<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">COVID-induced endothelial dysfunction causes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Capillary injury<\/li>\n\n\n\n<li>Microthrombosis<\/li>\n\n\n\n<li>Reduced oxygen delivery<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Peripheral nerves are highly dependent on microvascular circulation and may undergo ischemic injury.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Neuroinflammation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Persistent inflammatory activation involving:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cytokines<\/li>\n\n\n\n<li>Activated microglia<\/li>\n\n\n\n<li>Autoantibodies<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">can disrupt motor and sensory pathways.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Muscle Injury<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">COVID may also affect:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Skeletal muscle<\/li>\n\n\n\n<li>Mitochondrial function<\/li>\n\n\n\n<li>Neuromuscular junction transmission<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">resulting in weakness disproportionate to measurable nerve injury.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Spectrum of Functional Loss<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Mild Disability<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Patients may experience:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Intermittent numbness<\/li>\n\n\n\n<li>Reduced dexterity<\/li>\n\n\n\n<li>Fatigue with walking<\/li>\n\n\n\n<li>Occasional balance disturbances<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Most remain independent.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Moderate Disability<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Typical findings:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Significant sensory loss in feet<\/li>\n\n\n\n<li>Hand weakness<\/li>\n\n\n\n<li>Frequent falls<\/li>\n\n\n\n<li>Reduced grip strength<\/li>\n\n\n\n<li>Difficulty climbing stairs<\/li>\n\n\n\n<li>Difficulty standing from seated position<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Assistive devices often become necessary.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Severe Disability<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Symptoms may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Extensive sensory loss below knees<\/li>\n\n\n\n<li>Marked arm and hand weakness<\/li>\n\n\n\n<li>Inability to button clothing<\/li>\n\n\n\n<li>Loss of handwriting ability<\/li>\n\n\n\n<li>Dependence on walkers or wheelchairs<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Activities of daily living become impaired.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Profound Disability<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The most severe cases involve:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Near-complete sensory loss<\/li>\n\n\n\n<li>Severe motor weakness<\/li>\n\n\n\n<li>Inability to stand independently<\/li>\n\n\n\n<li>Dependence for bathing, dressing, and mobility<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This level resembles advanced inflammatory neuropathies or severe spinal cord disorders.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Disability Indices<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Neurological disability is often assessed using:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Modified Rankin Scale (mRS)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Score<\/th><th>Disability<\/th><\/tr><\/thead><tbody><tr><td>0<\/td><td>No symptoms<\/td><\/tr><tr><td>1<\/td><td>Minimal symptoms<\/td><\/tr><tr><td>2<\/td><td>Slight disability<\/td><\/tr><tr><td>3<\/td><td>Moderate disability<\/td><\/tr><tr><td>4<\/td><td>Moderately severe disability<\/td><\/tr><tr><td>5<\/td><td>Severe disability<\/td><\/tr><tr><td>6<\/td><td>Death<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Many long-COVID neuropathy patients fall within mRS 2\u20134.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Barthel Index<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Evaluates:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Feeding<\/li>\n\n\n\n<li>Dressing<\/li>\n\n\n\n<li>Walking<\/li>\n\n\n\n<li>Transfers<\/li>\n\n\n\n<li>Toileting<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lower scores indicate greater dependence.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Clinical Progression<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Early Stage<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Common findings:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tingling<\/li>\n\n\n\n<li>Numbness<\/li>\n\n\n\n<li>Burning feet<\/li>\n\n\n\n<li>Hand paresthesias<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Symptoms may fluctuate.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Intermediate Stage<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Progressive findings:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Weakness<\/li>\n\n\n\n<li>Balance impairment<\/li>\n\n\n\n<li>Reduced grip strength<\/li>\n\n\n\n<li>Gait dysfunction<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Advanced Stage<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Patients may develop:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Significant motor loss<\/li>\n\n\n\n<li>Muscle atrophy<\/li>\n\n\n\n<li>Falls<\/li>\n\n\n\n<li>Mobility dependence<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Diagnostic Evaluation<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Comprehensive evaluation includes:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Neurological Examination<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Assessment of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Strength<\/li>\n\n\n\n<li>Reflexes<\/li>\n\n\n\n<li>Sensation<\/li>\n\n\n\n<li>Gait<\/li>\n\n\n\n<li>Coordination<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Electromyography (EMG)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Identifies:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Axonal injury<\/li>\n\n\n\n<li>Demyelination<\/li>\n\n\n\n<li>Motor unit dysfunction<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Nerve Conduction Studies<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Determine severity and distribution of nerve damage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Skin Biopsy<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Useful for diagnosing small fiber neuropathy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">MRI<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">May reveal:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Spinal cord pathology<\/li>\n\n\n\n<li>Nerve root compression<\/li>\n\n\n\n<li>Central nervous system involvement<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Laboratory Testing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Common evaluations include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vitamin B12<\/li>\n\n\n\n<li>Folate<\/li>\n\n\n\n<li>Thyroid function<\/li>\n\n\n\n<li>Diabetes screening<\/li>\n\n\n\n<li>Autoimmune markers<\/li>\n\n\n\n<li>Inflammatory markers<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Management<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Rehabilitation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The cornerstone of treatment is:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Physical therapy<\/li>\n\n\n\n<li>Occupational therapy<\/li>\n\n\n\n<li>Balance training<\/li>\n\n\n\n<li>Strengthening exercises<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Early intervention improves outcomes.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Neuropathic Symptom Management<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Common medications include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gabapentin<\/li>\n\n\n\n<li>Pregabalin<\/li>\n\n\n\n<li>Duloxetine<\/li>\n\n\n\n<li>Amitriptyline<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These reduce pain but generally do not reverse nerve injury.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Immune-Modulating Therapy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Selected patients with documented autoimmune neuropathies may benefit from:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Intravenous immunoglobulin (IVIG)<\/li>\n\n\n\n<li>Corticosteroids<\/li>\n\n\n\n<li>Plasma exchange<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Treatment requires specialist evaluation.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Management of Contributing Conditions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Important factors include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diabetes control<\/li>\n\n\n\n<li>Nutritional optimization<\/li>\n\n\n\n<li>Correction of vitamin deficiencies<\/li>\n\n\n\n<li>Management of kidney disease<\/li>\n\n\n\n<li>Control of cardiovascular risk factors<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Long-Term Prognosis<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The prognosis varies widely.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Favorable Outcome<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Patients with mild neuropathic symptoms often experience:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Partial recovery over 6\u201324 months<\/li>\n\n\n\n<li>Improved strength<\/li>\n\n\n\n<li>Improved sensation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">although residual symptoms frequently remain.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Intermediate Outcome<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Many patients show:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Persistent numbness<\/li>\n\n\n\n<li>Reduced endurance<\/li>\n\n\n\n<li>Ongoing balance problems<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">despite functional improvement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Poor Outcome<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Patients with severe axonal nerve injury, autoimmune neuropathy, substantial microvascular damage, or concomitant spinal disease may have permanent deficits.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Residual disability can include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chronic gait impairment<\/li>\n\n\n\n<li>Persistent sensory loss<\/li>\n\n\n\n<li>Hand dysfunction<\/li>\n\n\n\n<li>Dependence on mobility aids<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Relevance to Your Previously Described Symptoms<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The combination you have previously described\u2014progressive proximal thigh weakness, difficulty rising from a chair, loss of sensation in the feet, gait impairment requiring a walker, and significant long-COVID history\u2014would generally warrant a comprehensive neurological evaluation because several potentially overlapping causes can produce this pattern:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Long-COVID neuropathy or myopathy.<\/li>\n\n\n\n<li>Lumbar spinal stenosis and epidural lipomatosis.<\/li>\n\n\n\n<li>Nerve-root compression.<\/li>\n\n\n\n<li>Chronic inflammatory neuropathy.<\/li>\n\n\n\n<li>Metabolic neuropathy associated with diabetes.<\/li>\n\n\n\n<li>Uremic neuropathy related to chronic kidney disease.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">When both sensory loss and motor weakness are progressing, neurologists typically consider EMG\/nerve-conduction testing, spinal imaging review, and laboratory evaluation to determine how much impairment is due to peripheral nerve injury versus spinal cord or nerve-root compression, because prognosis and treatment differ substantially between these conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">COVID-19-associated spasticity is an emerging neurological syndrome that appears to result from injury to central motor pathways rather than direct damage to muscle itself. Although uncommon compared with fatigue, neuropathy, and dysautonomia, spasticity has been reported following acute COVID-19, severe COVID-19 encephalopathy, post-COVID inflammatory syndromes, stroke, myelitis, and in some patients with long COVID who develop persistent central nervous system dysfunction.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Is Spasticity?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Spasticity is a disorder of muscle tone characterized by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Increased resistance to passive movement<\/li>\n\n\n\n<li>Hyperactive reflexes<\/li>\n\n\n\n<li>Muscle stiffness<\/li>\n\n\n\n<li>Involuntary muscle contractions<\/li>\n\n\n\n<li>Clonus (rhythmic muscle jerking)<\/li>\n\n\n\n<li>Abnormal posturing<\/li>\n\n\n\n<li>Difficulty with coordinated movement<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The fundamental problem is loss of inhibitory control from upper motor neurons.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Normally, the brain continuously suppresses excessive spinal reflex activity. When this inhibition is lost, spinal motor circuits become overactive, producing excessive muscle contraction.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Mechanisms in COVID-19<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Several pathological processes may contribute.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Neuroinflammation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">COVID-19 induces widespread inflammatory activation involving:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Microglia<\/li>\n\n\n\n<li>Astrocytes<\/li>\n\n\n\n<li>Cytokines<\/li>\n\n\n\n<li>Autoantibodies<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Persistent inflammation may damage motor control pathways within the brain and spinal cord.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Microvascular Injury<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">COVID-19 can damage the vascular endothelium, causing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Capillary dysfunction<\/li>\n\n\n\n<li>Microthrombi<\/li>\n\n\n\n<li>Blood-brain barrier disruption<\/li>\n\n\n\n<li>Focal ischemic injury<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Motor pathways are particularly vulnerable because of their high metabolic requirements.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Autoimmune Myelitis<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Some patients develop inflammation of the spinal cord.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Conditions reported include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Acute transverse myelitis<\/li>\n\n\n\n<li>Longitudinal extensive myelitis<\/li>\n\n\n\n<li>Demyelinating syndromes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These disorders can directly interrupt descending motor tracts.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">White Matter Injury<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Neuroimaging studies have demonstrated abnormalities involving:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Corticospinal tracts<\/li>\n\n\n\n<li>Corpus callosum<\/li>\n\n\n\n<li>Frontal white matter<\/li>\n\n\n\n<li>Brainstem pathways<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These regions are essential for regulating muscle tone.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Progression of COVID-Related Spasticity<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Stage 1: Subtle Dysfunction<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Patients may notice:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Leg tightness<\/li>\n\n\n\n<li>Calf stiffness<\/li>\n\n\n\n<li>Reduced flexibility<\/li>\n\n\n\n<li>Difficulty climbing stairs<\/li>\n\n\n\n<li>Fatigue<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Examination may reveal mild hyperreflexia.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Stage 2: Established Spasticity<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Typical findings include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stiff gait<\/li>\n\n\n\n<li>Reduced stride length<\/li>\n\n\n\n<li>Toe dragging<\/li>\n\n\n\n<li>Muscle cramps<\/li>\n\n\n\n<li>Hyperreflexia<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Walking becomes progressively inefficient.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Stage 3: Functional Impairment<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Patients may develop:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Scissoring gait<\/li>\n\n\n\n<li>Balance instability<\/li>\n\n\n\n<li>Frequent falls<\/li>\n\n\n\n<li>Difficulty rising from chairs<\/li>\n\n\n\n<li>Reduced hand dexterity<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Assistive devices become necessary.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Stage 4: Severe Disability<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Manifestations may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fixed contractures<\/li>\n\n\n\n<li>Severe rigidity<\/li>\n\n\n\n<li>Wheelchair dependence<\/li>\n\n\n\n<li>Inability to perform activities of daily living<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Fortunately, this level appears uncommon.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Comparison with Parkinson Disease<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">COVID-related spasticity and Parkinson disease can appear superficially similar.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>COVID Spasticity<\/th><th>Parkinson Disease<\/th><\/tr><\/thead><tbody><tr><td>Muscle stiffness<\/td><td>Common<\/td><td>Common<\/td><\/tr><tr><td>Slow movement<\/td><td>Common<\/td><td>Common<\/td><\/tr><tr><td>Tremor<\/td><td>Rare<\/td><td>Common<\/td><\/tr><tr><td>Hyperreflexia<\/td><td>Common<\/td><td>Rare<\/td><\/tr><tr><td>Rigidity<\/td><td>Variable<\/td><td>Characteristic<\/td><\/tr><tr><td>Postural instability<\/td><td>Common<\/td><td>Common<\/td><\/tr><tr><td>Bradykinesia<\/td><td>Variable<\/td><td>Hallmark<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The key difference is that Parkinson disease primarily involves degeneration of dopamine-producing neurons in the basal ganglia, whereas COVID-related spasticity generally reflects injury to corticospinal pathways and upper motor neuron networks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The pathological substrate is fundamentally different despite overlapping symptoms.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Relevant entity: Parkinson&#8217;s Disease<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Comparison with ALS<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">COVID-related spasticity may resemble early ALS because both can produce:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hyperreflexia<\/li>\n\n\n\n<li>Muscle stiffness<\/li>\n\n\n\n<li>Weakness<\/li>\n\n\n\n<li>Gait dysfunction<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">However, ALS usually demonstrates progressive degeneration of both upper and lower motor neurons.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Features more suggestive of ALS include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fasciculations<\/li>\n\n\n\n<li>Progressive muscle wasting<\/li>\n\n\n\n<li>Marked weakness<\/li>\n\n\n\n<li>Bulbar dysfunction<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">COVID-related syndromes often exhibit fluctuating symptoms and may stabilize or partially improve.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Relevant entity: Amyotrophic Lateral Sclerosis<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Similarities to Seizure Disorders<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">COVID-related spasticity differs fundamentally from epilepsy but shares certain mechanistic features.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Both may involve:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Neuroinflammation<\/li>\n\n\n\n<li>Abnormal neuronal excitability<\/li>\n\n\n\n<li>Altered neurotransmitter signaling<\/li>\n\n\n\n<li>Disrupted inhibitory networks<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In epilepsy, excessive neuronal firing produces seizures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In spasticity, excessive spinal motor neuron activity produces sustained muscle contraction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The underlying principle is similar: loss of normal inhibitory control.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Relevant entity: Epilepsy<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Neurophysiology of Spasticity<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The primary motor pathway affected is the corticospinal tract.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>f<\/mi><mo stretchy=\"false\">(<\/mo><mi>x<\/mi><mo stretchy=\"false\">)<\/mo><mo>=<\/mo><mtext>Motor&nbsp;Output<\/mtext><mo>\u2212<\/mo><mtext>Inhibitory&nbsp;Control<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">f(x)=\\text{Motor Output}-\\text{Inhibitory Control}<\/annotation><\/semantics><\/math>f(x)=Motor&nbsp;Output\u2212Inhibitory&nbsp;Control<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Conceptually, normal movement depends upon a balance between excitatory and inhibitory neural signals. When inhibitory pathways are damaged:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Reflex circuits become overactive.<\/li>\n\n\n\n<li>Muscle stretch triggers exaggerated responses.<\/li>\n\n\n\n<li>Alpha motor neurons fire excessively.<\/li>\n\n\n\n<li>Sustained contraction develops.<\/li>\n\n\n\n<li>Movement becomes inefficient and rigid.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Clinical Findings<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Neurological examination may reveal:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hyperreflexia<\/li>\n\n\n\n<li>Clonus<\/li>\n\n\n\n<li>Positive Babinski sign<\/li>\n\n\n\n<li>Increased muscle tone<\/li>\n\n\n\n<li>Velocity-dependent resistance to movement<\/li>\n\n\n\n<li>Spastic gait<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These findings indicate upper motor neuron dysfunction.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Diagnostic Evaluation<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Assessment often includes:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">MRI Brain<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Looking for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>White matter injury<\/li>\n\n\n\n<li>Stroke<\/li>\n\n\n\n<li>Demyelination<\/li>\n\n\n\n<li>Neuroinflammation<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">MRI Spine<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Evaluating:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Myelitis<\/li>\n\n\n\n<li>Cord compression<\/li>\n\n\n\n<li>Degenerative disease<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">EMG and Nerve Conduction Studies<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Helpful in distinguishing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Neuropathy<\/li>\n\n\n\n<li>Myopathy<\/li>\n\n\n\n<li>Motor neuron disease<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Cerebrospinal Fluid Analysis<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">May identify:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Autoimmune activity<\/li>\n\n\n\n<li>Inflammation<\/li>\n\n\n\n<li>Demyelinating processes<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Management<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Treatment focuses on reducing muscle overactivity and preserving function.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common approaches include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Physical therapy<\/li>\n\n\n\n<li>Stretching programs<\/li>\n\n\n\n<li>Occupational therapy<\/li>\n\n\n\n<li>Gait training<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Medications may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Baclofen<\/li>\n\n\n\n<li>Tizanidine<\/li>\n\n\n\n<li>Diazepam<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Severe cases may require:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Intrathecal baclofen pumps<\/li>\n\n\n\n<li>Botulinum toxin injections<\/li>\n\n\n\n<li>Advanced rehabilitation<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Long-Term Prognosis<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Current evidence suggests three broad trajectories:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Recovery Pattern<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Patients with predominantly inflammatory injury may improve over months to years.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Persistent Deficit Pattern<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Many stabilize with residual stiffness and gait abnormalities.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Progressive Neurodegenerative-Like Pattern<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A small subset of patients develop persistent neurological decline that can resemble Parkinsonian syndromes, upper motor neuron syndromes, or chronic neuroinflammatory disorders. Whether COVID initiates, accelerates, or unmasks latent neurodegenerative disease remains an active area of research.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For someone with long-COVID, progressive leg weakness, sensory loss, difficulty standing, and gait impairment\u2014as you have previously described\u2014the critical distinction is whether symptoms arise from:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Peripheral neuropathy,<\/li>\n\n\n\n<li>Spinal cord involvement,<\/li>\n\n\n\n<li>Lumbar nerve-root compression,<\/li>\n\n\n\n<li>Epidural lipomatosis,<\/li>\n\n\n\n<li>Uremic neuropathy from kidney disease,<\/li>\n\n\n\n<li>Long-COVID neuroinflammation,<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">or a combination of these processes. The pattern of reflexes, muscle tone, EMG findings, and spinal imaging often provides the most important clues regarding the underlying mechanism and expected prognosis.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Loss of sensory-motor function affecting the hands, arms, legs, and feet has become one of the more disabling neurological manifestations reported after acute COVID-19 infection. The condition is usually not [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":15185,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[334,894,365,1031,520],"tags":[],"class_list":["post-15163","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-motor-nerves","category-neurologic-symptoms-covid-19","category-neurologic-effects","category-neurology","category-sensory-nerves"],"_links":{"self":[{"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/posts\/15163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=15163"}],"version-history":[{"count":3,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/posts\/15163\/revisions"}],"predecessor-version":[{"id":15166,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/posts\/15163\/revisions\/15166"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/media\/15185"}],"wp:attachment":[{"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}