occipital horn

pos·te·ri·or horn

1. the occipital or posterior division of the lateral ventricle of the brain, extending backward into the occipital lobe;
See also: posterior column.

2. the posterior horn or gray column of the spinal cord as appearing in cross section. The posterior horn [TA] or dorsal horn [TAalt] contains spinal laminae I-VI [TA] of Rexed. The nuclei of the posterior horn are the marginal nucleus [TA] (nucleus marginalis [TA]), gelatinous substance [TA] (substantia gelatinosa [TA]), nucleus proprius [TA], secondary visceral grey substance [TA] (substantia visceralis secundaria [TA]), internal basilar nucleus [TA] (nucleus basilar internus [TA]), medial cervical nucleus [TA] (nucleus cervicalis medialis [TA]), posterior nucleus of lateral funiculus [TA] (nucleus posterior funiculi lateralis [TA]), and the lateral cervical nucleus.

Synonym(s): cornu posterius ventriculi lateralis [TA], cornu posterius [TA], occipital horn [TA], cornu of spinal cord

occipital horn

Any of the broad, calcified protrusions exostoses that extend caudally from the base of the skull, seen in X-linked type IX Ehlers-Danlos syndrome, which is related to defective copper metabolism, resulting in 2º lysyl oxidase deficiency and by extension, collagen defects.