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The hypoglossal canal is a foramen in the occipital bone of ... entry near the medulla oblongata to its exit from the base of the skull near the jugular foramen. [2] ...
Extending lateralward from the posterior half of the condyle is a quadrilateral plate of bone, the jugular process, excavated in front by the jugular notch, which, in the articulated skull, forms the posterior part of the jugular foramen. The jugular notch may be divided into two by a bony spicule, the intrajugular process, which projects ...
A jugular foramen is one of the two (left and right) large foramina (openings) in the base of the skull, located behind the carotid canal. It is formed by the temporal bone and the occipital bone. It allows many structures to pass, including the inferior petrosal sinus, three cranial nerves, the sigmoid sinus, and meningeal arteries.
jugular foramen: 2: internal jugular vein, inferior petrosal sinus, sigmoid sinus: glossopharyngeal nerve (IX), vagus nerve (X), accessory nerve (XI) temporal: posterior cranial fossa: stylomastoid foramen: 2: stylomastoid artery: facial nerve (VII) occipital: posterior cranial fossa: hypoglossal canal: 2-hypoglossal nerve (XII) occipital ...
To the sides of the foramen sitting at the junction between the lateral and base of the occipital bone are the hypoglossal canals. Further out, at each junction between the occipital and petrous portion of the temporal bone lies a jugular foramen. [2]
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. It is immediately superior to the extradural vertebral artery , which makes a loop above the posterior C1 ring to enter the foramen magnum .
The foramina in the base of the skull are exit and entry points for veins, arteries and cranial nerves. The cranial nerves as they exit through various foramina. Sphenoidal lingula; Subarcuate fossa; Dorsum sellae; Jugular process; Petro-occipital fissure; Condylar canal; Jugular tubercle; Tuberculum sellae; Carotid groove; Fossa hypophyseos ...
It overlies (i.e. is situated superior to [2]: 568 ) the hypoglossal canal [2]: 817 and is situated anterosuperior to the internal opening of this canal. [1] The glossopharyngeal nerve (CN IX), vagus (CN X), and accessory (CN XI) pass across the posterior portion of the jugular tubercle to reach the jugular foramen. [2]: 568