Weakness due to upper motor neuron dysfunction
Paralysis of voluntary muscles means loss of contraction due to interruption of one or more motor pathways from the brain to the muscle fibers. Although the word paralysis is often used interchangeably to mean either complete or partial loss of muscle strength, it is preferable to use paralysis or plegia for complete or severe loss of muscle strength, and paresis for partial or slight loss. Paralysis due to lesions of the principle motor tracts is related to a lesion in the corticospinal, corticobulbar or brainstem descending (subcorticospinal) neurons.
What is Weakness due to upper motor neuron dysfunction?
Weakness due to upper motor neuron dysfunction is a symptom that people may experience for many reasons. It can be related to infections, chronic conditions, injuries, medication effects, or other health changes. The presence of this symptom alone does not diagnose any condition.
If you have Weakness due to upper motor neuron dysfunction that is severe, persistent, or accompanied by other warning signs, contact a qualified healthcare provider.
Possible conditions associated with Weakness due to upper motor neuron dysfunction
The following conditions have been associated with Weakness due to upper motor neuron dysfunction. Only a health professional can determine the underlying cause.
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Related symptoms
When to seek medical care
Seek urgent care if Weakness due to upper motor neuron dysfunction is severe, sudden, or occurs with chest pain, difficulty breathing, confusion, severe weakness, or other serious symptoms.