Hypothalamus
Updates to Article Attributes
The hypothalamus (plural: hypothalami) is located, as the name would suggest, below the thalamus, and is intimately associated with both the limbic system and the pituitary gland.
Gross anatomy
Boundaries
Its boundaries are in some places poorly defined (outlined in blue in Figure 2):
anterior: lamina terminalis, with optic chiasm at its lower border and anterior commissure above
superior: an imaginary line drawn between the anterior and posterior commissures (AC-PC line)
posterior: an imaginary line sloping antero-inferiorly from the posterior commissure to the mammillary bodies
inferior (floor): infundibular stalk, tuber cinereum and mammillary bodies (from front to back)
Fibre tracts
postcommissural fornix: running posterior to the anterior commissure vertically down to end in the mamillary bodies
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principal mammillary bundle: originates in the mamillary body and runs superiorly a short distance before dividing into
mammillothalamic tract (a.k.a. Vicq d'Azyr bundle): terminates in the anterior thalamic nucleus
mammillotegmental tract (smaller)
Nuclei
The hypothalamus is really a collection of nuclei arranged symmetrically around its floor and lateral walls and can be divided into medial and lateral areas.
Medial area
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supraoptic (anterior)
supraoptic nucleus (medial part)
suprachiasmatic nucleus
medial preoptic nucleus
anterior nucleus
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tuberal
dorsomedial nucleus
ventromedial nucleus
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mammillary (posterior)
mammillary nuclei
posterior nucleus
Lateral area
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supraoptic (anterior)
lateral preoptic nucleus
supraoptic nucleus (lateral part)
lateral nucleus (anterior part)
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tuberal
lateral nucleus (tuberal part)
lateral tuberal nuclei
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mammillary (posterior)
lateral nucleus (posterior part)
Blood SupplyArterial supply
Tuberaltuberal: branches of PCOM and superior hypophyseal arteryPosteriorposterior: branches of PCAInfundibuluminfundibulum: superior hypophyseal arteries from the ophthalmic segment of ICA (C6)
-<p>The <strong>hypothalamus</strong> (plural: hypothalami) is located, as the name would suggest, below the <a href="/articles/thalamus">thalamus</a>, and is intimately associated with both the limbic system and the <a href="/articles/pituitary-gland">pituitary gland</a>. </p><h4>Gross anatomy</h4><h5>Boundaries</h5><p>Its boundaries are in some places poorly defined (outlined in blue in Figure 2):</p><ul>- +<p>The <strong>hypothalamus</strong> (plural: hypothalami) is located, as the name would suggest, below the <a href="/articles/thalamus">thalamus</a>, and is intimately associated with both the <a href="/articles/limbic-system" title="Limbic system">limbic system</a> and the <a href="/articles/pituitary-gland">pituitary gland</a>. </p><h4>Gross anatomy</h4><h5>Boundaries</h5><p>Its boundaries are in some places poorly defined (outlined in blue in Figure 2):</p><ul>
-</ul><h4>Blood Supply</h4><ul>-<li><p>Anterior: branches of <a href="/articles/anterior-cerebral-artery" title="ACA">ACA</a> and <a href="/articles/anterior-communicating-artery" title="Anterior communicating artery">ACOM</a></p></li>-<li><p>Tuberal: branches of <a href="/articles/posterior-communicating-artery" title="PCom">PCOM</a> and <a href="/articles/superior-hypophyseal-artery" title="Superior hypophyseal artery">superior hypophyseal artery</a></p></li>-<li><p>Posterior: branches of <a href="/articles/posterior-cerebral-artery" title="PCA">PCA</a></p></li>-<li><p>Infundibulum: superior hypophyseal arteries from the ophthalmic segment of <a href="/articles/internal-carotid-artery-1" title="Internal carotid artery">ICA</a> (C6)</p></li>- +</ul><h4>Arterial supply</h4><ul>
- +<li><p>anterior: branches of <a href="/articles/anterior-cerebral-artery" title="ACA">ACA</a> and <a href="/articles/anterior-communicating-artery" title="Anterior communicating artery">ACOM</a></p></li>
- +<li><p>tuberal: branches of <a href="/articles/posterior-communicating-artery" title="PCom">PCOM</a> and <a href="/articles/superior-hypophyseal-artery" title="Superior hypophyseal artery">superior hypophyseal artery</a></p></li>
- +<li><p>posterior: branches of <a href="/articles/posterior-cerebral-artery" title="PCA">PCA</a></p></li>
- +<li><p>infundibulum: <a href="/articles/superior-hypophyseal-artery" title="Superior hypophyseal artery">superior hypophyseal arteries</a> from the ophthalmic segment of <a href="/articles/internal-carotid-artery-1" title="Internal carotid artery">ICA</a> (C6)</p></li>