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Interthalamic adhesion in humans: a gray commissure?

Jorge Eduardo Duque Parra1,2, Álex Pava Ripoll1,2, Juan Fernando Vélez García3

  • 1Department of Basic Sciences, Faculty of Health Sciences, Universidad de Caldas, Manizales, Colombia.

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|October 22, 2021
PubMed
Summary
This summary is machine-generated.

Interthalamic adhesion, a variable part of human diencephalic neuroanatomy, was found in over half of brains studied. Histological analysis revealed it is not a gray commissure, but composed mainly of glial cells.

Keywords:
AnatomyDiencephalonHistologyNeuroanatomyThalamus

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Area of Science:

  • Neuroanatomy
  • Histology

Background:

  • Interthalamic adhesion is an inconsistent component of human diencephalic neuroanatomy.
  • Its histological nature as a gray or white commissure is debated.
  • Its presence is linked to neurological and psychiatric conditions like schizophrenia and hydrocephalus.

Purpose of the Study:

  • To determine the prevalence and histological composition of interthalamic adhesion in human brains.
  • To clarify whether interthalamic adhesion represents a gray or white commissure.

Main Methods:

  • Evaluation of 31 fresh human brains.
  • Third ventricle puncture via lamina terminalis.
  • Photographic documentation and hematoxylin-eosin staining for histological analysis.

Main Results:

  • Interthalamic adhesion was present in 51.71% of the evaluated brains.
  • Histological examination showed no neuron bodies in the median part of the adhesion.
  • The adhesion predominantly consists of glial cells, not neuronal bodies.

Conclusions:

  • Human interthalamic adhesion is not a gray commissure.
  • Interthalamic adhesion is a variable neuroanatomical structure in humans.
  • The composition is primarily glial cells, with no evidence of neuronal bodies in the median part.