Occipital horn
Cornu occipitale
- Latin synonym: Cornu posterius ventriculi lateralis
- Synonym: Posterior horn of lateral ventricle
- Related terms: Occipital horn of lateral ventricle; Posterior horn of lateral ventricle
Definition
The occipital horn of lateral ventricle is the posterior extension of the lateral ventricle into the occipital lobe. It curves posteriorly and medially from the atrium and shows considerable variation in its size and length.
Boundaries
The principal boundaries of the occipital horn of lateral ventricle are:
Roof and lateral wall: tapetum of the corpus callosum, which separates the occipital horn from the optic radiations.
Floor: collateral trigone.
Medial wall: bulb of the corpus callosum and calcar avis. The callosal bulb is produced by fibres of the forceps major, while the calcar avis is an elevation produced by the calcarine fissure.
References
Scelsi CL, Rahim TA, Morris JA, Kramer GJ, Gilbert BC, Forseen SE. The Lateral Ventricles: A Detailed Review of Anatomy, Development, and Anatomic Variations. AJNR Am J Neuroradiol. 2020 Apr;41(4):566-572.
Panteli, Aikaterini & Güngör, Abuzer & Firat, Zeynep & Sarıtepe, Fatih & Ture, Hatice & Türe, Uğur. (2022). The posterior interhemispheric transparieto-occipital fissure approach to the atrium of the lateral ventricle: a fiber microdissection study with case series. Neurosurgical Review. 45. 10.1007/s10143-021-01693-0.
