a.
(Anat.) Situated under the optic thalamus.
Subthalamus
| Dictionary: Sub·tha·lam·ic |
| 5min Related Video: Subthalamus |
| Medical Dictionary: sub·thal·a·mus |
(sŭb-thăl'ə-məs)
n.
n.
The part of the diencephalon that is wedged ventrally between the thalamus on the dorsal side and the cerebral peduncle, is lateral to the dorsal half of the hypothalamus, and is caudally continuous with the mesencephalic tegmentum.
sub'tha·lam'ic (-thə-lăm'ĭk) adj.| Veterinary Dictionary: subthalamus |
The ventral thalamus or subthalamic tegmental region: a transitional region of the diencephalon interposed between the (dorsal) thalamus, the hypothalamus, and the tegmentum of the mesencephalon (midbrain); it includes the subthalamic nucleus and the zona incerta, all with unknown functions.
| Wikipedia: Subthalamus |
| Brain: Subthalamus | ||
|---|---|---|
| Coronal slices of human brain showing the basal ganglia, subthalamic nucleus (STN) and substantia nigra (SN). STN is in subthalamus; SN is not. | ||
| NeuroNames | hier-417 | |
| MeSH | Subthalamus | |
| NeuroLex ID | birnlex_708 | |
The subthalamus is a part of the diencephalon. [1]
Contents |
Anatomy
During development the subthalamus is continuous with the hypothalamus, but is separated by white matter fibres mainly from the internal capsule. Caudally, the subthalamus or prethalamus is separated from the thalamus by the zona limitans intrathalamica. Other nuclei of the subthalamus are the zona incerta, thalamic reticular nucleus, and the fields of Forel.
Post-natally the subthalamus lies beneath the thalamus, hence 'sub' (meaning below) 'thalamus'. It also lies dorsolateral to the hypothalamus.
Relations
The subthalamus develops efferent (output) connections to the striatum (caudate nucleus and putamen) in the telencephalon, to the dorsal thalamus (medial and lateral nuclear groups) in the diencephalon, and to the red nucleus and substantia nigra in the mesencephalon. It receives afferent (input) connections from the substantia nigra and striatum.
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 | prosencephalon |
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| What are the major divisions of the brain? (anatomy) |
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 | Dictionary. Webster 1913 Dictionary edited by Patrick J. Cassidy Read more |
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| Medical Dictionary. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Read more |
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| Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved. Read more |
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| Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Subthalamus". Read more |
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