The condyloid fossa is a shallow depression located on the occipital bone, just behind each occipital condyle.
This bony depression is significant because it sometimes contains a small opening called the condylar canal (or posterior condylar canal). This canal serves as a passage for an emissary vein, which connects the sigmoid sinus within the skull to veins outside the skull. This connection allows for blood to flow between these two regions.
Here's a breakdown:
- Location: Posterior to the occipital condyles on the occipital bone.
- Description: A shallow, bony depression.
- Function: Can house the condylar canal.
- Condylar Canal:
- A small opening, not always present.
- Allows passage of an emissary vein.
- Connects the sigmoid sinus to extracranial veins.
In summary, the condyloid fossa is a notable anatomical feature of the occipital bone, occasionally providing a pathway for venous drainage from the brain.
