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CHP8 The Skeletal System

3 table spinal cord enters brain through foramen

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Unformatted text preview: e of nerves/blood vessels holes (Table 8.3) (Table Spinal cord enters brain through foramen magnum~ Spinal foramen • Brainstem can be forced out of f.m. during severe brain Brainstem swelling swelling Major Skull Cavities Major • Cranial cavity • Orbit contains eyeball & Orbit extraocular muscles extraocular • Ethmoid sinus • Nasal cavity • Maxillary sinus • Buccal cavity Skull (cont.) Skull 8 cranial bones cover meninges of brain~ frontal, parietal, temporal, occipital, sphenoid, ethmoid bones temporal, • Bones lie directly on dura mater of meninges (toughest, Bones dura thickest, outer layer of 3 layers) 14 facial bones have no direct contact w/ meninges~ 14 • Serve as attachment of facial & jaw muscles Skull (cont.) Skull 2 parts of cranium= calvaria (skullcap…roof & walls) & base parts calvaria base (floor…w/ 3 basins) (floor…w/ • Basins contour inferior surface for brain= anterior cranial Basins fossa (frontal lobes), middle c.f. (temporal), posterior c.f. fossa middle posterior (cerebellum) (cerebellum) Frontal bone= ‘‘forehead’ & part of roof; coronal (or frontal) forehead’ suture, supraorbital margin, supraorbital foramen, glabella, & frontal sinus glabella, Parietal & Temporal Bones Parietal 2 parietal bones= form cranial roof & part of lateral walls • 4 sutures= coronal (frontal), sagittal, lambdoid & squamous sutures= coronal sagittal lambdoid squamous • Marked by temporal lines of tempor...
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