Bassett Collection of Stereoscopic Images of Human Anatomy

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Osteology

Roentgenogram of skull, inferosuperior view

Image #35-7

KEYWORDS: Bones cartilage joints, Overview.

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Osteology

Roentgenogram of skull, inferosuperior view

In this specimen one of the depressions (18) in the parietal bone which accommodates arachnoidal granulations (see Section I, 1-3) is unusually prominent as an area of rarification in the bone.

1 .	Frontal sinus
2 .	Inferior orbital fissure
3 .	Maxillary sinus (posterior portion)
4 .	Wall of cranial vault separating middle cranial fossa (below) from infratemporal fossa (above)
5 .	Lesser wing of sphenoid bone (note continuation medially into anterior clinoid process)
6 .	Position of mandibular fossa
7 .	Posterior margin of petrosal part of temporal bone
8 .	Mastoid process
9 .	Occipitomastoid suture
10 .	Nasolacrimal canal
11 .	Anterior surface of maxilla (pointer near Infraorbital foramen)
12 .	Lateral wall of cranial vault (anterior cranial fossa lies medial to this)
13 .	Zygomatic arch
14 .	Sphenoid sinus (ethmoidal cells visible anteriorly)
15 .	Carotid canal
16 .	External acoustic meatus
17 .	Foramen magnum occipital (junction of coronal suture and sagittal suture visible in background)
18 .	Depression in parietal bone for arachnoidal granulations
19 .	Sagittal suture