Variations of the first cervical nerve (C1) and the spinal accessory nerve (XI) in the Cercopithecus.
D000055:Accessory Nerve / Q000033:anatomy & histology*; D000818:Animals; D002574:Cervical Vertebrae; D005260:Female; D005727:Ganglia, Spinal / Q000033:anatomy & histology; D000882:Haplorhini / Q000033:anatomy & histology*; D008297:Male; D013126:Spinal Nerve Roots / Q000033:anatomy & histology; D013127:Spinal Nerves / Q000033:anatomy & histology*