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The stylomastoid foramen is between the styloid and mastoid processes of the temporal bone. The average distance between the opening of the stylomastoid foramen and the styloid process is around 0.7 mm or 0.8 mm in adults, but may decrease to around 0.2 mm during aging. [1]
Intervertebral foramen, foramina formed between vertebrae; Lesser sciatic foramen, an opening between the pelvis and the posterior thigh; Obturator foramen, the opening created by the ischium and pubis bones of the pelvis; Vertebral foramen, the foramen formed by the anterior segment (the body), and the posterior part, the vertebral arch
A glomus jugulare tumor grows in the temporal bone of the skull, in an area called the jugular foramen. The jugular foramen is also where the jugular vein and several important nerves exit the skull. This area contains nerve fibers, called glomus bodies. Normally, these nerves respond to changes in body temperature or blood pressure.
The proximal portion of the facial canal is termed the horizontal part.It commences at the introitus of facial canal at the distal end of the internal auditory meatus. The horizontal part is further subdivided into two crura: the proximal/medial [4] anteriolaterally [5] directed medial crus (or labyrinthine segment [5]), and the distal/lateral [4] posteriolaterally [5] directed lateral crus ...
The stylomastoid artery enters the stylomastoid foramen and supplies the tympanic cavity, the tympanic antrum and mastoid cells, and the semicircular canals. It is a branch of the posterior auricular artery , and thus part of the external carotid arterial system.
The cochlear and vestibular branches of cranial nerve VIII separate according to this schema and terminate in the inner ear. The facial nerve continues traveling through the facial canal, eventually exiting the skull at the stylomastoid foramen. A common mnemonic to remember the anterior quadrants of the inner ear is: "seven up, coke down ...
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The digastric branch of facial nerve provides motor innervation to the posterior belly of the digastric muscle. [1] [2] It branches from the facial nerve (CN VII) near to the stylomastoid foramen [1] as the CN VII exits the facial canal (it thus branches proximal to the parotid plexus of facial nerve). [2]