Final answer:
Autonomic Dysreflexia typically occurs in spinal cord injuries above the T6 level and is associated with the sympathetic division of the autonomic nervous system in the thoracolumbar system.
Step-by-step explanation:
Autonomic Dysreflexia is a serious and potentially life-threatening condition that often occurs in individuals with a spinal cord injury (SCI) above the thoracic sixth vertebra (T6). This condition is characterized by an abnormal response of the nervous system to stimulation below the level of the injury, causing sudden high blood pressure. The sympathetic division of the autonomic nervous system is related to this reflex, and it generally impacts those with injuries at or above the thoracolumbar system, which includes the upper thoracic and upper lumbar regions of the spinal cord.