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What is the difference between an upper motor neuron lesion and a lower motor neuron lesion?
Wiki User
∙ 8y ago
- LMNL
- It is due to lesion of lower motor neurons i.e. the spinal and cranial motor neurons that directly innervate the muscles.
- Usually single or individual muscle is affected.
- Disuse atrophy of muscles.
- All reflexes are absent.
- flaccid paralysis occurs.
- Babinski planter response not elicited.
2. UMNL
- It is due to upper motor neuron lesion.
- It involves group of muscles.
- spastic paralysis occurs.
- muscle atrophy is not severe.
- reflexes
- deep reflexes are hyperactive.
- superficial refle;xes;only abdominal,cremastric and anal reflexes are lost.
- Babinski sign:positive.
AI'IGHT,UUUMMM HOPE THIS HELPS :)
LOWER MOTOR NEURON LESION: vs UPPER MOTOR NEURON LESION:
1)FLACCID MUSCLE SPASTICITY OF MUSCLE
2)HYPO-TONIA HYPER-TONIA
3)HYPO-REFLEXIA HYPER-REFLEXIA
4)PROFOUND MUSCLE ATROPHY MINIMAL MUSCLE ATROPHY
5)FASCICULATIONS("TWITCHING") PRESENT FASCICULATIONS ABSNT
SO JUST REMEMBER: LOWER = HYPO- EVERYTHING ; UPPER = HYPER- EVERYTHING,
WELL, EXCEPT OFCOURSE - THE TWITCHING AND MUSCLE ATROPHY (ITS REVERSED).
Wiki User
∙ 8y ago
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