Falx cerebelli
Skull anatomy From Wikipedia, the free encyclopedia
The falx cerebelli is a small sickle-shaped fold of dura mater projecting forwards into the posterior cerebellar notch as well as projecting into the vallecula of the cerebellum between the two cerebellar hemispheres.[1]
| Falx cerebelli | |
|---|---|
Falx cerebelli seen in back portion of skull. | |
 Occipital bone. Inner surface. (Portions "for faulx cerebelli" identified at center left.) | |
| Details | |
| Part of | Meninges |
| Identifiers | |
| Latin | falx cerebelli |
| NeuroNames | 1238 |
| TA98 | A14.1.01.106 |
| TA2 | 5377 |
| FMA | 83974 |
| Anatomical terms of neuroanatomy | |
The name comes from two Latin words: falx, meaning "curved blade or scythe", and cerebellum, meaning "little brain".[2]
Anatomy
Summarize
Perspective
The falx cerebelli is a small midline fold of dura mater projecting anterior-ward from the skull and into the space between the cerebellar hemispheres.[3] It generally measures between 2.8 and 4.5 cm in length, and approximately 1–2 mm in thickness.[4]
Attachments
Superiorly, it (with its upwardly directed base) attaches at the midline to the posterior portion of the inferior surface of the tentorium cerebelli.[3]
Posteriorly, it attaches to the internal occipital crest; the inferior-most extremity of its posterior attachment frequently divides into two small folds that terminate at either side of the foramen magnum.[3]
Anatomical relations
The occipital sinus is contained within the posterior extremity of the falx cerebelli where it attaches to the internal occipital crest.[3]
Anatomical variation
In its lower portion the falx cerebelli diminishes very rapidly in height and as it descends, it can divide into two smaller folds or diverging limbs,[5] which are lost on the sides of the foramen magnum. Other variations such as duplication,[6] triplication,[7] absence,[8] and fenestration are much less common. As dural venous sinuses are concurrent with the development of dural folds, duplication of the falx cerebelli is usually associated with duplicated occipital sinus.[9] Knowledge of these variations is important in preventing iatrogenic injuries in this region.[citation needed]
See also
- Falx (disambiguation) — other parts of the anatomy with names including "falx"
References
External links
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