Tuber cinereum

The tuber cinereum is the portion of hypothalamus[1] forming the floor of the third ventricle situated between the optic chiasm, and the mammillary bodies.[2] The tuberal region one of the three regions of the hypothalamus (the other two being the chiasmatic region, and mamillary region).[1]

Not to be confused with tuberculum cinereum, ala cinerea (vagal trigone) or Tuber cinereum (fungus).
Tuber cinereum
Base of brain (Tuber cinerum visible at center).
Details
Identifiers
LatinTuber cinereum
MeSHD014371
NeuroNames1782
NeuroLex IDbirnlex_1189
TA98A14.1.08.408
TA25673
FMA62327
Anatomical terms of neuroanatomy

Structure

The tuber cinereum is a convex mass of grey matter,[3]: 495  a ventral/inferior distention of the hypothalamus forming the floor of the third ventricle. The portion of the tuber cinerum at the base of the infundibulum (pituitary stalk) is the median eminence;[2] the infundibulum extends ventrally/inferiorly from the median eminence to become continuous with the infundibulum.[3]: 499 

The arcuate nucleus is a part of the tuber cinereum.[3]: 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.[1]

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.[4] is continuous anteriorly with the lamina terminalis, and laterally with the anterior perforated substances.

Blood supply

Arterial blood supply to the tuber cinereum is provided by the anterior choroidal artery.[3]: 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.[5]

Additional images
  • Mesal aspect of a brain sectioned in the median sagittal plane.
    Mesal aspect of a brain sectioned in the median sagittal plane.
  • The fornix and corpus callosum from below.
    The fornix and corpus callosum from below.

See also

References

Public domain This article incorporates text in the public domain from page 813 of the 20th edition of Gray's Anatomy (1918)

  1. Braak, Heiko; Braak, Eva (1992), "Chapter 1 Anatomy of the human hypothalamus (Chiasmatic and tuberal region)", 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, Progress in Brain Research, vol. 93, Elsevier, pp. 3–16, doi:10.1016/s0079-6123(08)64559-8, ISBN 978-0-444-89538-7, PMID 1480754, retrieved 2023-08-14
  2. Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). Elsevier Australia. p. 470. ISBN 978-0-7295-3752-0.
  3. Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)
  4. "tuber cinereum". TheFreeDictionary.com. Retrieved 2023-08-14.
  5. Shaver SW, Pang JJ, Wainman DS, Wall KM, Gross PM (March 1992). "Morphology and function of capillary networks in subregions of the rat tuber cinereum". Cell and Tissue Research. 267 (3): 437–48. doi:10.1007/BF00319366. PMID 1571958. S2CID 27789146.
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