Paraplegia is a condition characterized by the loss of movement and sensation in the lower half of the body, typically affecting the legs. This condition usually results from spinal cord injuries or diseases that impact the nerves controlling the lower body. Individuals with paraplegia may retain full use of their arms and hands. Quadriplegia, also known as tetraplegia, involves the loss of movement and sensation in all four limbs, including the arms and legs. This condition often arises from injuries to the cervical region of the spinal cord. People with quadriplegia may require assistance with daily activities and may use specialized equipment for mobility and communication.