Uncus
Updates to Article Attributes
The uncus is the innermost part of the temporal lobe.
Gross anatomy
Its lateral neighbour isThe uncus lies medial to the parahippocampal gyrus.
it 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, however some supply isit can also possiblebe partially supplied by small branches from the posterior cerebral artery (PCA).
Related pathology
ItTeh uncus is a common origin for of temporal lobe seizures. As olfactory or gustatory hallucinations may precede seizuresSeizures starting in the uncus may be preceded by olfactory or gustatory hallucinations, hence the antiquated term rhinencephalon for its developmental origin still has some value.
ItThe uncus is also known fromfeatured in the term uncal herniation (downward transtentorial herniation of the uncus).
History and etymology
The uncus comes from theUncus is Latin for "hook", referencing its shape.
-<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>- +<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>The uncus lies medial to the parahippocampal gyrus. It belongs to the limbic system. Housing the primary olfactory cortex, it is 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, it can also be partially supplied by small branches from the posterior cerebral artery (<a href="/articles/posterior-cerebral-artery">PCA</a>). </p><h4>Related pathology</h4><p>Teh uncus is a common origin of <a href="/articles/temporal-lobe-epilepsy">temporal lobe seizures</a>. Seizures starting in the uncus may be preceded by olfactory or gustatory hallucinations, hence the antiquated term rhinencephalon for its developmental origin.</p><p>The uncus is also featured in the term <a href="/articles/uncal-herniation">uncal herniation</a> (downward transtentorial herniation of the uncus).</p><h4>History and etymology</h4><p>Uncus is Latin for "hook", referencing its shape. </p>
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