Internal surface of squamous part of frontal bone
Facies interna squamae frontalis
- Synonym: Inner surface of squamous part of frontal bone
- Related terms: Internal surface
Definition
The internal surface of squamous part of frontal bone is curved inward. It features several distinct bony features. For example, at the top middle, there is a groove named the sagittal sulcus. The edges of this groove afford attachment to the two layers of the dura mater that form the falx cerebri, and the groove itself houses the superior sagittal sinus. Moving forward and lower down, the sagittal sulcus’s edges come together to make a ridge known as the frontal crest. This crest is also where the falx cerebri attaches. Right at the front of the frontal crest, there’s a small hole, the foramen caecum. In some cases, this foramen allows a vein from the nose drain into the superior sagittal sinus.
References
__________________________________________________________________
Text written by Muhammad A. Javaid, MD, PhD © 2024 IMAIOS.
Drake, R.L., Vogl, A.W. and Mitchell, A.W.M. (2009). ‘Chapter 8: Head and Neck’ in Gray’s anatomy for Students. (2nd ed.) Philadelphia PA 19103-2899: Elsevier, pp. 812-813.
Singh O, Varacallo M. Anatomy, Head and Neck: Frontal Bone. [Updated 2023 Jul 24]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK535424/
Standring, S. (2016). ‘Chapter 30: Face and Scalp’ in Gray’s anatomy: the anatomical basis of clinical practice. (41st ed.) New York NY: Elsevier, pp. 479.
