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Skull and Facial Muscles - Anatomy & Physiology (view source)
Revision as of 19:41, 23 January 2011
, 19:41, 23 January 2011→Major Foramen and Canals
==Major Foramen and Canals==
==Major Foramen and Canals==
[[Image:Foramen Magnum.jpg|thumb|right|150px|Foramen Magnum (Horse) - Copyright nabrown RVC]]
[[Image:Foramen Magnum.jpg|thumb|right|150px|Foramen Magnum (Horse) - Copyright nabrown RVC]]
The '''foramen magnum''' is formed by the occipital bones and is the spinal cord's passage to the neck and body. The '''alar ligaments''' run through the foramen magnum together with vertebral arteries, spinal arteries and tectoral membranes. The '''hypoglossal canal''' is between paracondylar and condylar processes on lateral part of occipital bone. The '''hypoglossal nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN XII]]), '''condylar artery''' and '''condylar vein''' all pass through. The '''optic chiasma''' runs in a transverse depression behind the '''sphenoid rostrum''' on presphenoid bone and facilitates the path of the '''optic nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN II]]).
The '''jugular foramen''' is located either side of basilar part of occipital bone, adjacent to tympanic bulla and contains the '''glossopharyngeal nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN IX]]), '''vagus nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN X]]) and '''accessory nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN XI]]). The jugular foramen also contains the '''internal carotid artery'''. The '''foramen magnum''' is formed by the occipital bones and is the spinal cord's passage to the neck and body. The '''alar ligaments''' run through the foramen magnum together with vertebral arteries, spinal arteries and tectoral membranes. The '''hypoglossal canal''' is between paracondylar and condylar processes on lateral part of occipital bone. The '''hypoglossal nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN XII]]), '''condylar artery''' and '''condylar vein''' all pass through. The '''optic chiasma''' runs in a transverse depression behind the '''sphenoid rostrum''' on presphenoid bone and facilitates the path of the '''optic nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN II]]).
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