Paraplegia is defined as impairment of motor function in the lower extremities, with or without sensory involvement, and is usually caused by involvement of the spinal cord, nerves supplying the lower limbs, or muscles directly. It is classified as spastic or flaccid depending on the affected part of the nervous system and resulting muscle tone. Common causes include spinal cord injuries, infections, tumors, and vascular disorders. A thorough history, neurological examination, and imaging tests are used to diagnose the condition and determine the specific cause and level of spinal involvement.