Final answer:
Quadriplegia is the paralysis of all four extremities, often resulting from a spinal cord injury.
Step-by-step explanation:
The condition characterized by paralysis of all four extremities is known as quadriplegia. This severe form of paralysis typically results from spinal cord injuries that affect the arms, hands, trunk, legs, and pelvic organs. In contrast, paraplegia affects the trunk, legs, and pelvic organs but spares the arms and hands, while hemiplegia is paralysis on one side of the body, and hemiparesis refers to partial weakness on one side. Apraxia, which is not a form of paralysis, is a disorder of the brain that impacts the ability to perform coordinated movements.