Anterior Spinal Artery Occlusion

Anterior Spinal Artery Occlusion is a condition where the main blood vessel supplying the front part of the spinal cord becomes blocked. This blockage affects the spinal cord, which is crucial for transmitting signals between the brain and the rest of the body. When the blood flow is interrupted, it can cause sudden weakness or paralysis, especially in the legs, and loss of certain sensations like pain and temperature. The condition often leads to difficulty moving and problems with bladder or bowel control. It is a serious medical issue because the spinal cord cells need constant oxygen and nutrients to function properly, and without blood supply, they can be damaged quickly.

Anterior Spinal Artery Occlusion is an acute ischemic event caused by obstruction of the anterior spinal artery, which supplies the anterior two-thirds of the spinal cord. The occlusion typically results from embolism, thrombosis, or systemic hypotension leading to infarction of the anterior spinal cord. This vascular territory includes the corticospinal tracts, spinothalamic tracts, and anterior horn cells, causing characteristic clinical features such as bilateral motor paralysis below the lesion, loss of pain and temperature sensation, and preserved dorsal column function. The condition is a form of spinal cord stroke and represents a neurological emergency due to the risk of permanent disability. It is most commonly seen in the thoracic region but can occur at any spinal level. Early recognition is critical for diagnosis and management.