IMG_0080 - Frontal bone Anterior cranial lossa Cribriform...

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by rm :EI ay ll- TE LE ie e I d f J Crista galli Olfactory foramina Optic canal Foramen rotundum Foramen ovale Dorsum s6llae lnternal acoustic meatus Jugular foramen Foramen magnum (a) Lesser wing Greater wing Foramen ovale Squamous portion of temporal Petrous portion of temporal Foramen magnum (b) FIGURE 11.5 lnterior of the Cranium (a) Diagram; (b) photograph. orbit, you can see the frontal sinus as a hollow space in the anterior portion of the frontal bone. The dividing line between the anterior and middle cranial fossae is the sphenoid bone. Locate the lesser wings of the sphenoid and the sella turcica just posterior to it, The sella turcica has a small depression in which the pituitary gland sits. The posterior, raised part of the sella turcica is known as the dorsum sellae. The greater wings LABORATORYll Axial Skeleton-Skull
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Unformatted text preview: Frontal bone Anterior cranial lossa Cribriform plate (ethmoid bone) Sphenoid bone Sella turcica Middle cranial fossa Temporal bone a. Squamous portion b. Petrous portion Parietal bone Posterior cranial fossa Occipital bone Anterior cranial fossa Crisla galli Cribriform plate Sella turcica Dorsum sellae Middle cranial fossa Posterior cranial fossa of the sphenoid are more inferior than the lesser wings, and each one contains the foramen rotundum, which takes a branch of the trigeminal nerve to the maxilla. The foramen ovale can be seen from this view as well. Behind the sphenoid bone is the temporal bone, which has a flattened lateral section knov,m as the squamous portion and a heavier mass of bone known as the petrous portion. The petrous portion divides the middle and...
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This note was uploaded on 02/09/2012 for the course BIO 102 taught by Professor William during the Spring '11 term at Harvard.

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