Uncus
Updates to Article Attributes
The uncus (latin for hook) is the innermost part of the temporal lobe. Its lateral neighbor is the parahippocampal gyrus.
Functionally
it belongs to the limbic system. Housing the primary olfactory cortex, it is a part of the olfactory system, receiving fibres from the olfactory tract via the lateral olfactory stria.
Blood supply
Primary it is served by uncal arteries, small branches arising from the M1 segment of the middle cerebral artery MCA, however some supply is also possible by small branches from the posterior cerebral artery PCA.
Clinical significance
It is a common origin for temporal lobe seizures. As olfactory or gustatory hallucinations may precede seizures starting in the uncus, the antiquated term rhinencephalon for its embryologic origindevelopmental origin still has some value.
It is also known from the term uncal herniation (downward transtentorial herniation).
-<p>The <strong>uncus</strong> (latin for hook) is the innermost part of the temporal lobe. Its lateral neighbor is the parahippocampal gyrus. </p><h6>Functionally</h6><p>it belongs to the limbic system</p><h6>Blood supply</h6><p>Primary it is served by uncal arteries, small branches arising from the M1 segment of the middle cerebral artery <a title="Middle cerebral artery (MCA)" href="/articles/middle-cerebral-artery">MCA</a>, however some supply is also possible by small branches from the posterior cerebral artery <a title="Posterior cerebral artery (PCA)" href="/articles/posterior-cerebral-artery">PCA</a>. </p><h6>Clinical significance</h6><p>It is a common origin for temporal lobe seizures. As olfactory or gustatory hallucinations may precede seizures starting in the uncus, the antiquated term rhinencephalon for its embryologic origin still has some value.</p>- +<p>The <strong>uncus</strong> (latin for hook) is the innermost part of the <a href="/articles/temporal-lobe">temporal lobe</a>. Its lateral neighbor is the parahippocampal gyrus. </p><h6>Functionally</h6><p>it belongs to the limbic system. Housing the primary olfactory cortex, it is a part of the olfactory system, receiving fibres from the olfactory tract via the lateral olfactory stria.</p><h6>Blood supply</h6><p>Primary it is served by uncal arteries, small branches arising from the M1 segment of the middle cerebral artery <a href="/articles/middle-cerebral-artery">MCA</a>, however some supply is also possible by small branches from the posterior cerebral artery <a href="/articles/posterior-cerebral-artery">PCA</a>. </p><h6>Clinical significance</h6><p>It is a common origin for <a href="/articles/temporal-lobe-epilepsy">temporal lobe seizures</a>. As olfactory or gustatory hallucinations may precede seizures starting in the uncus, the antiquated term rhinencephalon for its developmental origin still has some value.</p><p>It is also known from the term uncal herniation (downward transtentorial herniation).</p>
References changed:
- 2. Neuroanatomy: an Illustrated Colour Text, 5e. Churchill Livingstone. ISBN:0702054054. <a href="http://books.google.com/books?vid=ISBN0702054054">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0702054054">Find it at Amazon</a><span class="auto"></span> Chapter 16, 160-170
- 1. Haines DE. Fundamental Neuroscience for Basic and Clinical Applications: with STUDENT CONSULT Online Access, 4e. Saunders. ISBN:1437702945. <a href="http://books.google.com/books?vid=ISBN1437702945">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/1437702945">Find it at Amazon</a><span class="auto"></span> Chapter 31, 431-441.e1
Systems changed:
- Central Nervous System
Sections changed:
- Anatomy
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