| Lamina terminalis | |
|---|---|
 Median sagittal section of brain of human embryo of three months. (Lamina terminalis labeled at center left.) | |
 Median sagittal section of brain of human embryo of four months. (Lamina terminalis labeled at center right.) | |
| Details | |
| Identifiers | |
| Latin | lamina terminalis |
| NeuroNames | 208 |
| TA98 | A14.1.08.419 |
| TA2 | 5776 |
| FMA | 61975 |
| Anatomical terms of neuroanatomy | |
Thelamina terminalis is a thin layer that forms the median portion of the wall of theforebrain. It stretches from theinterventricular foramen (foramen of Monro) to the recess at the base of theoptic stalk (optic nerve) and contains thevascular organ of the lamina terminalis, which regulates theosmotic concentration of the blood. The lamina terminalis is immediately anterior to thetuber cinereum; together they form thepituitary stalk.
The lamina terminalis can be opened viaendoscopicneurosurgery in an attempt to create a path thatcerebrospinal fluid can flow through when a person hashydrocephalus and when it is not possible to perform anendoscopic third ventriculostomy,[1] but the effectiveness of this technique is not certain.[2]
This is the rostral end (tip) of theneural tube (embryologicalcentral nervous system) in the early weeks of development. Failure of the lamina terminalis to close properly at this stage of development will result inanencephaly ormeroencephaly.
This article incorporates text in thepublic domain frompage 816 of the 20th edition ofGray's Anatomy(1918)
