Uncus
Updates to Article Attributes
The uncus (latin for hook) is is the innermost part of the temporal lobe. Its
Gross anatomy
Its lateral neighborneighbour 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
Related pathology
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 developmental origin still has some value.
It is also known from the term uncal herniation (downward transtentorial herniation).
History and etymology
The uncus comes from the Latin for "hook".
-<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>- +<p>The <strong>uncus</strong> is the innermost part of the <a href="/articles/temporal-lobe">temporal lobe</a>. </p><h4>Gross anatomy</h4><p>Its lateral neighbour is the parahippocampal gyrus. </p><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><h4>Blood supply</h4><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><h4>Related pathology</h4><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 <a title="uncal herniation" href="/articles/uncal-herniation">uncal herniation</a> (downward transtentorial herniation).</p><h4>History and etymology</h4><p>The uncus comes from the Latin for "hook". </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
- 2. DSc ARCP, FRCP DNMD. 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
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