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PNS Pathology
Peripheral NS Pathologies
Question | Answer |
---|---|
Anterior Horn Cell | Sensory component intact |
Anterior Horn Cell | Motor weakness and atrophy |
Anterior Horn Cell | Fasciculation |
Anterior Horn Cell | Decreased DTR |
Anterior Horn Cell | Example: ALS, Polio |
Peripheral Polyneuropathy | Sensory impairments; "stocking glove" distributionq |
Peripheral Polyneuropathy | Motor weakness and atrophy; weaker distally than proximally; may have fasciculations |
Peripheral Polyneuropathy | Decreased DTR |
Peripheral Polyneuropathy | Example: diabetic peripheral neuropathy |
Spinal Roots and Nerves | Sensory component will have corresponding dermatomal deficits |
Spinal Roots and Nerves | Motor weakness in an innervated pattern; may have fasciculations |
Spinal Roots and Nerves | Decreased DTR |
Spinal Roots and Nerves | Example: herniated disc |
Neuromuscular Junction | Sensory component intact |
Neuromuscular Junction | Motor fatigue noted |
Neuromuscular Junction | Normal DTR |
Neuromuscular Junction | Example: myasthenia gravis |
Peripheral Nerve (mononeuropathy) | Sensory loss along the nerve route |
Peripheral Nerve (mononeuropathy) | Motor weakness and atrophy in a peripheral distribution; may have fasciculations |
Peripheral Nerve (mononeuropathy) | Example: trauma |
Muscle | Sensory component intact |
Muscle | Motor weakness; fasciculations are rare |
Muscle | Normal or decreased DTR |
Muscle | Example: muscular dystrophy |