| Feature | UMN Lesion | LMN Lesion | |---------|------------|-------------| | Weakness | Yes | Yes | | Muscle tone | Hypertonia (spastic) | Hypotonia (flaccid) | | Reflexes | Hyperreflexia | Hyporeflexia/areflexia | | Babinski sign | Present (extensor) | Absent (flexor) | | Atrophy | Mild (disuse) | Severe, early |
These carry "express" messages like fine touch and proprioception (knowing where your limbs are). ascending and descending tracts of spinal cord ppt