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Anteriorly, the posterior cranial fossa is bounded by the dorsum sellae, posterior aspect of the body of sphenoid bone, and the basilar part of occipital bone/clivus. [2] Laterally, it is bounded by the petrous parts and mastoid parts of the temporal bones, and the lateral parts of occipital bone. [2]
English: Boundaries of the posterior cranial fossa (green) 1: Dorsum sellae of the sphenoid bone; 2: Superior borders of the petrous part of the temporal bone; 3: Groove for transverse sinus of the occipital bone
A cranial fossa is formed by the floor of the cranial cavity. There are three distinct cranial fossae: [1] Anterior cranial fossa (fossa cranii anterior), housing the projecting frontal lobes of the brain [2] Middle cranial fossa (fossa cranii media), separated from the posterior fossa by the clivus and the petrous crest housing the temporal ...
The base of skull, also known as the cranial base or the cranial floor, is the most inferior area of the skull. It is composed of the endocranium and the lower parts of the calvaria . Structure
Figure 4 : Sphenoid bone at birth, posterior aspect. Until the seventh or eighth month of fetal development , the body of the sphenoid consists of two parts: one in front of the tuberculum sellae , the presphenoid, with which the small wings are continuous; the other, consisting of the sella turcica and dorsum sellae , the postsphenoid, with ...
In a study conducted on 100 skulls, the foramen ovale was divided into 2 or 3 components in 4.5% of the cases. The borders of the foramen in some skulls were also irregular and rough. This may suggest, based on radiological images, the presence of morbid changes, which might be the sole anatomical variation in the foramina ovalia of humans. [4]
Anterior cranial fossa; Middle cranial fossa. Interpeduncular fossa; Posterior cranial fossa; Hypophyseal fossa; Temporal bone fossa Mandibular fossa; Jugular fossa; Infratemporal fossa; Pterygopalatine fossa; Pterygoid fossa; Lacrimal fossa. Fossa for lacrimal gland; Fossa for lacrimal sac; Scaphoid fossa; Condyloid fossa; Rhomboid fossa; In ...
posterior cranial fossa: hypoglossal canal: 2-hypoglossal nerve (XII) occipital: posterior cranial fossa: foramen magnum: 1: anterior and posterior spinal arteries, vertebral arteries: lowest part of medulla oblongata, three meninges, ascending spinal fibers of accessory nerve (XI) [3] occipital: posterior cranial fossa: condylar canal: 1