occipital horn


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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.

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.
References in periodicals archive ?
T1-weighted magnetic resonance imaging with contrast showing a lobulated heterogeneously enhancing mass in occipital horn of the left lateral ventricle.
MRI of brain revealed (i) sub ependymal grey matter heterotopia along the occipital horn and atrium of right lateral ventricle.
Axial T2 and FLAIR images showed dilated occipital horns of both lateral ventricles.
There are two short occipital horns and three temporal horns on each side, of which the external horns are the shortest (Horowitz, 1955; Sherbrooke, 2003).
Ten morphological traits were measured on males and females: total tail length (TTL, cloaca to tip of tail); head length (HL, dorsal line front front tip of prenraxilla to back edge of parietal section of head); head width (HW, cheek region behind angle of jaws on one side to cheek region on other side); occipital horns length (OHL, front the base of these horns to tip); temporal horns length (THL1 and THL2, base to tip of these horns); superciliary scales length (SSL, base of these scales to tip); distance between the occipital horns (DOH, tip to tip of these horns); distance between superciliar scales (DSS, tip to tip of these scales); number of scales in the lateral fringe (SLF, total scales on left and right sides).
Because patients are usually scanned in the supine position, particularly important locations include the interpeduncular cistern, the occipital horns of the lateral ventricles, the quadrigeminal plate cistern, and the dependent portions of the Sylvian fissures (Figure 1).
That report stated, inter alias "The lateral ventricles are enlarged, including the atria, occipital horns and body.
a CSF-filled cleft lined by grey matter extending from the subarachnoid space from the right parietal lobe region communicating with the trigone and occipital horns of the right lateral ventricle
Radiographic findings of dysgenesis or agenesis of the corpus callosum include absence of, or a malformed corpus callosum (Figure 15), and parallel orientation of the lateral ventricles; normally the frontal horns lie closer together than the occipital horns of the lateral ventricles.
5) This phenomenon is termed colpocephaly and is sonographically identified when the occipital horns of the lateral ventricles are disproportionately larger than the frontal horns.