tuber cinereum
{{Short description|Anatomical structure in the brain}}
{{distinguish|text=tuberculum cinereum, ala cinerea (vagal trigone) or Tuber cinereum (fungus)}}
{{Infobox brain
| Name = Tuber cinereum
| Latin = tuber cinereum
| Image = File:Gray724.png
| Caption = Base of brain (Tuber cinereum visible at center).
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The tuber cinereum is the portion of hypothalamus forming the floor of the third ventricle situated between the optic chiasm, and the mammillary bodies.{{Citation |last1=Braak |first1=Heiko |date=1992 |url=https://linkinghub.elsevier.com/retrieve/pii/S0079612308645598 |series=Progress in Brain Research |volume=93 |pages=3–16 |access-date=2023-08-14 |publisher=Elsevier |language=en |doi=10.1016/s0079-6123(08)64559-8 |isbn=978-0-444-89538-7 |last2=Braak |first2=Eva|title=The Human Hypothalamus in Health and Disease, Proceedings of the 17th International Summer School of Brain Research, held at the Auditorium of the University of Amsterdam |chapter=Chapter 1 Anatomy of the human hypothalamus (Chiasmatic and tuberal region) |pmid=1480754 }}{{Cite book |last=Sinnatamby |first=Chummy S. |title=Last's Anatomy |publisher= Elsevier Australia|year=2011 |isbn=978-0-7295-3752-0 |edition=12th |pages=470}} The tuberal region is one of the three regions of the hypothalamus, the other two being the chiasmatic region and the mamillary region.
Structure
The tuber cinereum is a convex mass of grey matter,{{Cite book |last=Standring |first=Susan |url=https://www.worldcat.org/oclc/1201341621 |title=Gray's Anatomy: The Anatomical Basis of Clinical Practice |year=2020 |isbn=978-0-7020-7707-4 |edition=42th |location=New York |pages= |oclc=1201341621}}{{Rp|page=495}} a ventral/inferior distention of the hypothalamus forming the floor of the third ventricle.{{Citation needed|date=August 2023}} The portion of the tuber cinerum at the base of the infundibulum (pituitary stalk) is the median eminence; the infundibulum extends ventrally/inferiorly from the median eminence to become continuous with the infundibulum.{{Rp|page=499}}
The arcuate nucleus is a part of the tuber cinereum.{{Rp|page=497.e1}} The lateral portions of tuber cinereum lodge the lateral tuberal nucleus, and tuberomammillary nucleus. The basolateral aspect of the tuber cinereum often presents slight elevations produced by the underlying lateral tuberal nucleus - the lateral eminence.
= Relations =
The tuber cinereum is situated caudal to the optic chiasm, medial to the optic tract (which flanks it on either side), and rostral to the two mammillary bodies.{{Cite web |title=tuber cinereum |url=https://medical-dictionary.thefreedictionary.com/tuber+cinereum |access-date=2023-08-14 |website=TheFreeDictionary.com |language=en}} is continuous anteriorly with the lamina terminalis, and laterally with the anterior perforated substances.{{Citation needed|date=August 2023}}
= Blood supply =
Arterial blood supply to the tuber cinereum is provided by the anterior choroidal artery.{{Rp|page=1464.e62}}
= Microanatomy =
Capillaries of the tuber cinereum are specialized and confluent to enable rapid communication via brain- or blood-borne factors between compartments of the tuber, a capillary system described as the hypophyseal portal system. The subregion of the hypothalamic arcuate nucleus closest to the median eminence contains specialized permeable capillaries surrounded by wide pericapillary spaces, enabling moment-to-moment sensing of circulating blood.{{cite journal |vauthors=Shaver SW, Pang JJ, Wainman DS, Wall KM, Gross PM |date=March 1992 |title=Morphology and function of capillary networks in subregions of the rat tuber cinereum |journal=Cell and Tissue Research |volume=267 |issue=3 |pages=437–48 |doi=10.1007/BF00319366 |pmid=1571958 |s2cid=27789146}}{{Primary source inline|date=August 2023}}
Additional images
File:Gray715.png|Mesal aspect of a brain sectioned in the median sagittal plane.
File:Gray748.png|The fornix and corpus callosum from below.
See also
References
{{Gray's}}
{{reflist}}
External links
- {{UMichAtlas|n1a8p1}} - "Interpeduncular fossa" (#4)
{{Diencephalon}}
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