Lamina terminalis [Neurosurgery Wiki]

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====== Lamina terminalis ======
{{::anteriorclinoidprocess.jpg|}}

AC: [[anterior clinoid process]]; ICA: [[internal carotid artery]]; LT: [[lamina terminalis]]; ON: [[optic nerve]]; OlN; [[olfactory nerve]]; SW: [[sphenoid wing]]; TS: [[tuberculum sellae]]; A1: A1 segment of the [[Anterior Cerebral Artery]]; A2: A2 segment of the [[Anterior Cerebral Artery]]; M1: M1 segment of the [[Middle Cerebral Artery]]

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The median portion of the wall of the fore-brain vesicle consists of a thin lamina, the lamina terminalis, which stretches from the [[interventricular foramen]] (Foramen of Monro) to the recess at the base of the [[optic stalk]] and contains the organum vasculosum of the lamina terminalis, which regulates the osmolarity of the blood.

see [[Translamina terminalis approach]].

Access to the [[third ventricle]] can be achieved through the [[lamina terminalis]] corridor. A skull base approach to the lamina terminalis can be performed using either an anterolateral approach (orbitozygomatic, pterional, supraorbital) or a midline approach (extended [[transbasal approach]], subfrontal). 

{{http://ueu.co/wp-content/uploads/2014/09/C16FF41.png}}

{{laminaterminalis.jpg?400}}

====Permissions====
http://www.3dneuroanatomy.com/wp-content/uploads/2011/12/lso15.jpg

Systematic review revealed no significant association between lamina terminalis fenestration and a reduced incidence of shunt-dependent hydrocephalus. The interpretation of these results, however, is restricted by unmatched cohort differences as well as other inherent study limitations. Although the overall literature supports lamina terminalis fenestration, a number of authors have questioned the technique's benefits, thus rendering its efficacy in reducing shunt-dependent hydrocephalus unclear. A well-designed, multicenter, randomized controlled trial is needed to definitively address the efficacy of this microsurgical technique
((Komotar RJ, Hahn DK, Kim GH, Starke RM, Garrett MC, Merkow MB, Otten ML,
Sciacca RR, Connolly ES Jr. Efficacy of lamina terminalis fenestration in
reducing shunt-dependent hydrocephalus following aneurysmal subarachnoid
hemorrhage: a systematic review. Clinical article. J Neurosurg. 2009
Jul;111(1):147-54. doi: 10.3171/2009.1.JNS0821. Review. PubMed PMID: 19284236.
)).

===== Lamina terminalis function =====
see [[Lamina terminalis function]].