Characteristic feature of upper motor neuron lesion includes:
(a) Fasciculations
(b) Hyporeflexia
(c) Clonus
(d) Muscle wasting
ANS- (c) Clonus
| UMN Lesion | LMN Lesion | |
| Tone | Increased | Decreased |
| Deep tendon reflex | Exaggerated | absent |
| Abdominal reflex | Lost | Preserved |
| Plantar reflex | Extensor (Babinski present) | Flexor (babinski absent) |
| muscle wasting | Rare | Common presentaion |