(kom-o'-she-o) [L.]. A commo- tion or shock. C. cerebri, concussion of the brain. C. retinae, concussion or paralysis of the retina from a blow on or near the eye. It is characterized by sudden blindness, but there is little or no ophthalmoscopic evidence of any lesion. The sight is usually regained, and its loss is supposedly due to disturbance of the retinal elements. C. spinalis, railway spine.
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