Falx cerebelli
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The falx cerebelli is a small infolding of the dura in the sagittal plane over the floor of the posterior cranial fossa. It partially separates the two cerebellar hemispheres 1.
Gross Anatomyanatomy
The falx cerebelli is attached posteriorly in the midline to the internal occipital crest of the occipital bone where it contains the occipital sinus 2. Its anterior edge exists freely between the partially separated cerebellar hemispheres in the posterior cerebellar notch. Superiorly it is attached to the tentorium cerebelli 1. Inferiorly, it extends to the posterior edge of the foramen magnum. At this point it sometimes divides into two separate parts which extend anteriorly either side of the foramen magnum 2-3.
Relations
- anteriorly: cerebellum
- posteriorly: occipital bone
- inferiorly: foramen magnum
- superiorly: tentorium cerebelli
Variant anatomy
- duplication of the falx cerebelli
- absence of the falx cerebelli in Chiari II malformation (rare) 4
Related Pathologypathology
-<p>The <strong>falx cerebelli </strong>is a small infolding of the <a href="/articles/dura-mater">dura </a>in the sagittal plane over the floor of the <a href="/articles/posterior-cranial-fossa">posterior cranial fossa</a>. It partially separates the two cerebellar hemispheres <sup>1</sup>.</p><h4>Gross Anatomy</h4><p>The <strong>falx cerebelli</strong> is attached posteriorly in the midline to the internal occipital crest of the <a href="/articles/occipital-bone">occipital bone</a> where it contains the <a href="/articles/occipital-sinus">occipital sinus</a> <sup>2</sup>. Its anterior edge exists freely between the partially separated cerebellar hemispheres in the posterior cerebellar notch. Superiorly it is attached to the <a href="/articles/tentorium-cerebelli">tentorium cerebelli</a> <sup>1</sup>. Inferiorly, it extends to the posterior edge of the <a href="/articles/foramen-magnum">foramen magnum</a>. At this point it sometimes divides into two separate parts which extend anteriorly either side of the foramen magnum <sup>2-3</sup>. </p><h5>Relations</h5><ul>- +<p>The <strong>falx cerebelli </strong>is a small infolding of the <a href="/articles/dura-mater">dura </a>in the sagittal plane over the floor of the <a href="/articles/posterior-cranial-fossa">posterior cranial fossa</a>. It partially separates the two cerebellar hemispheres <sup>1</sup>.</p><h4>Gross anatomy</h4><p>The <strong>falx cerebelli</strong> is attached posteriorly in the midline to the internal occipital crest of the <a href="/articles/occipital-bone">occipital bone</a> where it contains the <a href="/articles/occipital-sinus">occipital sinus</a> <sup>2</sup>. Its anterior edge exists freely between the partially separated cerebellar hemispheres in the posterior cerebellar notch. Superiorly it is attached to the <a href="/articles/tentorium-cerebelli">tentorium cerebelli</a> <sup>1</sup>. Inferiorly, it extends to the posterior edge of the <a href="/articles/foramen-magnum">foramen magnum</a>. At this point it sometimes divides into two separate parts which extend anteriorly either side of the foramen magnum <sup>2-3</sup>. </p><h5>Relations</h5><ul>
-</ul><h4>Related Pathology</h4><ul>- +</ul><h4>Related pathology</h4><ul>
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