Which of the following is not a feature of Upper Motor Neuron lesion?
Ans. is. 'c' i.e., Positive sharp waves on EMG * Following table compares and contrasts the features of upper motor neuron and lower motor neuron lesionsDifference between upper and lower motor neuron paralysisUpper motor neuron paralysisLower motor neuron paralysis* Muscles affected in groups never individual nuscles.* Atrophy slight and due to disuse.* Spasticity with hyperactivity of the tendon reflexes and* Extensor plantar reflex (Babinski sign)* Fascicular twitches absent* Normal nerve conduction studies; no denervation potentials in E.M.G.* Individual nuscles may be affected.* Atrophy pronounced up to 70% of the total bulk.* Flaccidity and hypotonia of affected muscles with loss of tendon reflexes.* Plantar reflex if present is of normal flexor type* Fasciculation may be present* Abnormal nerve conduction studies; denervation potential (fibrillations, fasciculations positive sharp waves) in E.M.G.* It is clear from the table that presence of fibrillations, fasciculations and positive sharp waves are features of lower motor neuron and not upper motor neuron lesions.
Positive babinsky sign
Normal nerve conduction study
Positive sharp waves on EMG
Hyperactive tendon reflexes
C.N.S.