Hippocampal commissure
Updates to Article Attributes
The hippocampal commissure (HC), also called the commissure of the fornix, is a transversely-oriented white matter tract connecting the two hippocampi via the fornices (1). The specific function of the HC is unknown at this time, although damage to the fornices have been shown to lead to memory loss (2).
Gross anatomy
Arching superiorly and medially over posterior surface of the thalamus, the fornix contains white matter fibres travelling from the hippocampus to the ipsilateral mamillary body (3, 4). In the region of the fornix immediately below the splenium and body of the corpus callosum, a portion of the fibres within the fornix decussate and travel transversely to join the contralateral fornix (3). This collection of decussating fibres comprise the HC and form the psalterium, a thin triangular lamina spanning between the body of the left and right fornices (1). Given the close locationproximity of the HC to the interventricular foramen of Monro, the HC and the related fornices may be damaged during the endoscopic removal of a colloid cyst (4,5).
-<p>The<strong> hippocampal commissure (HC), </strong>also called the commissure of the fornix<strong>,</strong> is a transversely-oriented white matter tract connecting the two hippocampi via the fornices (1). The specific function of the HC is unknown at this time, although damage to the fornices have been shown to lead to memory loss (2).</p><p><strong>Gross anatomy</strong></p><p>Arching superiorly and medially over posterior surface of the thalamus, the fornix contains white matter fibres travelling from the hippocampus to the ipsilateral mamillary body (3, 4). In the region of the fornix immediately below the splenium and body of the corpus callosum, a portion of the fibres within the fornix decussate and travel transversely to join the contralateral fornix (3). This collection of decussating fibres comprise the HC and form the <em>psalterium</em>, a thin triangular lamina spanning between the body of the left and right fornices (1). Given the close location of the HC to the interventricular foramen of Monro, the HC and the related fornices may be damaged during the endoscopic removal of a colloid cyst (4,5).</p>- +<p>The<strong> hippocampal commissure (HC), </strong>also called the commissure of the fornix<strong>,</strong> is a transversely-oriented white matter tract connecting the two hippocampi via the fornices (1). The specific function of the HC is unknown at this time, although damage to the fornices have been shown to lead to memory loss (2).</p><p><strong>Gross anatomy</strong></p><p>Arching superiorly and medially over posterior surface of the thalamus, the fornix contains white matter fibres travelling from the hippocampus to the ipsilateral mamillary body (3, 4). In the region of the fornix immediately below the splenium and body of the corpus callosum, a portion of the fibres within the fornix decussate and travel transversely to join the contralateral fornix (3). This collection of decussating fibres comprise the HC and form the <em>psalterium</em>, a thin triangular lamina spanning between the body of the left and right fornices (1). Given the proximity of the HC to the interventricular foramen of Monro, the HC and the related fornices may be damaged during the endoscopic removal of a colloid cyst (4,5).</p>
References changed:
- 1 Gray, Henry, and S. Standring. "Gray’s anatomy: the anatomical basis of clinical practice, 40th edn. Churchill-Livingstone." (2008).
Sections changed:
- Anatomy
Systems changed:
- Central Nervous System
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