Tags: Disease.
Iniencephaly a term derived from the Greek word inion for nape of the neck is a rare type of cephalic disorder that was first described by Étienne Geoffroy Saint-Hilaire in 1836. Those afflicted with the disorder all share 3 common characteristics: a defect to the occipital bone spina bifida of the cervical vertebrae and retroflexion (backward bending) of the head on the cervical spine.