A 4-year-old female toy poodle was admitted with signs of unconsciousness, left head tilt, nystagmus of the left eye, paralysis of the limbs and severe salivation due to falling downstairs. Medical therapy including dexamethasone, diazepam administration was started just after the admission, and then radiography and a CT-scan were performed under xylazine sedation. As a result, the left articular process of the occipital bone was fractured and the bone fragment seemed to compress the cervical spinal cord. The patient received the surgery under GOP anesthesia. The ventral aspect of the occipito-atlantal joint was incised and a few bone fragments around the spinal cord were removed. On the 2nd day of postoperation, the light reflex of the both eyes appeared and the patient recovered consciousness on the 3rd day. On the 7th day, the patient showed a good appetite, and anal reflex and postural reflexes of the right forelimb reversed. On the 14th day, the postural reflexes of all the hindlimbs appeared and the patient could show voluntary walking. At the 8th month of postoperation, the gait and other behaviors were almost normal.
