The key characteristics and functions associated with different levels of spinal cord injury are as follows: Cervical injuries (C1-C8): These can result in quadriplegia (paralysis of all four limbs and the trunk) or varying degrees of impairment in the arms, legs, and trunk. Higher-level injuries may affect breathing and require respiratory support. Thoracic injuries (T1-T12): These injuries primarily affect the trunk and lower extremities. The extent of paralysis depends on the specific level of injury. Individuals may retain some arm and hand function. Lumbar injuries (L1-L5): These injuries primarily affect the hips and legs. Individuals with lumbar injuries usually retain full or near-full upper body function, including arm and hand control.