The condylar canal and its associated emissary vein serve as vital landmarks during surgical interventions involving skull base surgery. The condylar canal serves to function as a bridge of communication from the intracranial to extracranial space.
What structure passes through the foramen magnum?
Its contents include the medulla oblongata, meninges, spinal root of cranial nerve XI, vertebral arteries, anterior and posterior spinal arteries, the tectorial membrane, and alar ligaments.
Where is condylar foramen?
The condylar canal, or canalis condylaris, is a skull base canal in the posterior cranial fossa, located in the condylar fossa. It is the largest of the emissary foramina of the skull 1.
Where is the hypoglossal canal?
Occipital Condyle
Introduction. Hypoglossal Canal (HC) is a paired bony passage which is situated above the Occipital Condyle (OC) and transmits hypoglossal nerve and blood vessels.
What goes through each foramen in skull?
Summary
| Foramen | Structures Conducted | Cranial Bone |
|---|---|---|
| Hypoglossal canal | Hypoglossal nerve (CN XII) | Occipital bone |
| Foramen magnum | Vertebral arteries Medulla and meninges CN XI (spinal division) Dural veins Anterior and posterior spinal arteries | Occipital bone |
What goes through mastoid foramen?
The mastoid emissary vein passes through the mastoid foramen, making the connection between the sigmoid sinus into the posterior auricular and occipital veins [5].
What comes out of the hypoglossal canal?
Hypoglossal Nerve This is the motor nerve for the oral tongue. It emerges from the skull through the hypoglossal canal in the occipital bone. As it emerges it is medial to the internal jugular vein, internal carotid artery, and cranial nerves IX, X, and XI.
Where is the condylar canal located in the body?
The condylar canal (or condyloid canal) is a canal in the condyloid fossa of the lateral parts of occipital bone behind the occipital condyle. Resection of the rectus capitis posterior major and minor muscles reveals the bony recess leading to the condylar canal, which is situated posterior and lateral to the occipital condyle.
What kind of canal is the condylar fossa?
condylar canal an occasional opening in the condylar fossa for transmission of the transverse sinus; called also posterior condyloid foramen. canal of Corti a space between the outer and inner rods of Corti. femoral canal the cone-shaped medial part of the femoral sheath lateral to the base of Gimbernat’s ligament.
Where does the posterior condylar vein exit the skull?
The posterior condylar vein exits the skull through the posterior condylar (or condy loid) canal, which is a communication between the jugular foramen and the condylar fossa, situ ated just posterior to the occipital condyles on either side of the foramen magnum (4) (Fig 1). This canal allows for venous anastomosis be-
Is the posterior condylar canal readily identifiable on CT?
RESULTS: The posterior condylar canal was identified on CT bilaterally in 31 % of the final study group and unilaterally in 50%. On gross specimens, this structure was identified in 55.9% bilaterally and 17.6% unilaterally. The posterior condylar canal, when present, is readily identifiable in a predictable location.
