CHP8 The Skeletal System

mandible bone fuses midsagittal cartilaginous jnt

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Unformatted text preview: nterior branch= coronoid process, iinsertion pt for nsertion Anterior coronoid temporalis muscle (shuts jaw) • ‘U’ shape btw branches= mandibular notch U’ mandibular • Mandibular foramen lies on medial surface of ramus, below notch so nerves/vessels can supply lower teeth below • Injection area for anesthesia TMJ- temporomandibular joint…hinge of mandible …hinge of Mandible (cont.) Mandible Bone fuses @ midsagittal cartilaginous jnt (mental symphasis) in fetus…ossifies during early childhood in • Mental protuberance= point of chin • Mental foramen= passage for nerves/vessels to chin 7 Bones Associated w/ Skull Bones 3 bones/middle ear= auditory ossicles bones/middle auditory • Malleus (hammer), incus (anvil), & stapes (stirrup) incus stapes Hyoid bone= slender bone btw chin & larynx • Suspended from styloid processes by stylohyoid muscles & Suspended processes stylohyoid ligaments stylohyoid • 3 parts to bone- body, greater & lesser horns • Attachment for muscles of mandible, tongue, larynx • Evidence of strangulation Child’s skull Child’s Skull of children do not completely fuse until ~8-9 yrs Fontanels= unfused spaces btw cranial bones of infants • Fibrous mem’s join bones & are usually ossified ~1 yr Fibrous mem’s • Frontal bone & mandible fuse in early childhood • Skull grows more rapidly to allow for brain growth • ~9 yrs head size of adults Vertebral Column Vertebral VC supports skull &...
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