Posterior spinal artery syndrome

Posterior spinal artery syndrome
5: posterior spinal arteries

Posterior spinal artery syndrome (PSAS), also known as posterior spinal cord syndrome, is a type of incomplete spinal cord injury.[1] PSAS is the least commonly occurring of the six clinical spinal cord injury syndromes, with an incidence rate of less than 1%.

PSAS originates from an infarct in the posterior spinal artery and is caused by lesions on the posterior portion of the spinal cord, specifically the posterior column, posterior horn, and posterolateral region of the lateral column.[2] These lesions can be caused by trauma to the neck, occlusion of the spinal artery, tumors, disc compression, vitamin B12 deficiency, syphilis, or multiple sclerosis.[3] Despite these numerous pathological pathways, the result is an interruption in transmission of sensory information and motor commands from the brain to the periphery.

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