J Clin Neuroophthalmol. 1986 Mar; 6(1): 11-3.

Occipital infarction following chiropractic cervical manipulation.

Gittinger JW.

A 44-year-old man developed a complete homonymous hemianopia 2 days after undergoing chiropractic cervical manipulation. Thromboembolism from the vertebrobasilar circulation--as the consequence of trauma to the vertebral arteries by adjacent bones, muscles, and ligaments during twisting and extension of the neck--is the probable mechanism for occipital infarction and other strokes in this and previous cases. Other neuroophthalmic manifestations reported include Horner's syndrome and sixth nerve and gaze palsies.