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The diencephalon of the brain consists of structures that are lateral to the third ventricle, and includes the thalamus, the hypothalamus, the epithalamus and the subthalamus.

Diencephalon
Gray715.png
Mesial aspect of a brain sectioned in the median sagittal plane.
Details
Identifiers
Latin diencephalon
MeSH A08.186.211.730.385
Code TH H3.11.03.5.00001
NeuroNames hier-271
NeuroLex ID Diencephalon
TA A14.1.03.007
A14.1.08.001
TH H3.11.03.5.00001
FMA 62001
Anatomical terms of neuroanatomy

The diencephalon is one of the main vesicles of the brain formed during embryogenesis. During the third week of development a neural tube is created from the ectoderm, one of the three primary germ layers. The tube forms three main vesicles during the third week of development: the prosencephalon, the mesencephalon and the rhombencephalon. The prosencephlon gradually divides into the telencephalon and the diencephalon.

Contents

StructureEdit

 
Location of the Diencephalon (red)

The diencephalon consists of the following structures:

Anterior and Posterior Paraventricular nuclei
Medial and lateral Habenular nuclei
Stria medullaris thalami
Posterior commissure
Pineal body

AttachmentsEdit

The optic nerve (CNII) attaches to the diencephalon. The optic nerve is a sensory (afferent) nerve responsible for vision; it runs from the eye through the optic canal in the skull and attaches to the diencephalon. The retina itself is derived from the optic cup, a part of the embryonic diencephalon.

FunctionEdit

The diencephalon is the region of the embryonic vertebrate neural tube that gives rise to anterior forebrain structures including the thalamus, hypothalamus, posterior portion of the pituitary gland, and pineal gland. The hypothalamus performs numerous vital functions, most of which relating directly or indirectly to the regulation of visceral activities by way of other brain regions and the autonomic nervous system.

Additional imagesEdit

See alsoEdit

ReferencesEdit

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

External linksEdit