Course Hero Logo

6-Skeletal_System-Axial-New_PPT.pptx - Skeletal System...

Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e.g., in search results, to enrich docs, and more. This preview shows page 1 - 19 out of 65 pages.

Skeletal SystemAxial Skeleton
Axial skeletonskullribssternumvertebraesacrumcoccyx
The Axial SkeletonSKELETAL SYSTEMAPPENDICULAR SKELETON(see Figure 7.1)AXIAL SKELETON80Skull andassociatedbonesThoraciccageVertebralcolumnSkullAssociatedbonesAuditoryossiclesCraniumFaceHyoidSternumRibsVertebraeSacrumCoccyx292526142424861111Anterior view of the skeletonhighlighting components of theaxial skeleton; the flowchartindicates relationships amongthe axial components.126206
Fossae
Skull
Skull
SkullSuperior temporal lines(22)Inferior temporal lines(21)Parietal eminence:(1) smooth parietal surfacesuperior to these lines.
Cranial Bone: Frontal BoneForms forehead & the roofs of our orbits.Superciliary archSupraorbital margin(superior margin of each orbit)has a hole (or notch) called thesupraorbitalforamen. This is where the ophthalmic branch ofcranial nerve V comes out.Fontal squama(forehead)Glabella:btwn “eyebrows”Lacrimal fossa:depressionfor lacrimal gland
Cranial Bone: Frontal interior viewForamen caecum(2)(Transmits veins from nose to sinus)Clinical importance in that infectionsof the nose and nearby areas can betransmitted to the meninges& brain!)Frontal sinuses(1)
Cranial Bone: Temporal Bone
Temporal Bone2 temporal bonesTemporal squama:19ends the squamous suture.Zygomatic process: 18projects anteriorly to meet thezygomatic bone.External auditory meatus:16akaexternal auditory canal
Temporal BoneMastoid process:17 “mastoid” , anchoring site for muscles of neck.Just posterior to your ear.mastoid aircells (small sinuses)Styloid process:15projects inferiorly, needle like.Attachment site for somemuscles of tongue, larynx,ligament thatconnects skull to hyoid bone.
Cranial bones: Temporal BoneStylomastoid foramen:(#11)Mandibular fossa(#9):Carotid canal:( #23)opens at thepetrous portionof the temporalbone.For carotid artery topass through.
Cranial bones: Temporal BoneJugular foramen:(21)hole for jugular veinForamen lacerum:(24)That is not part of anybone, rather at a junctionof two bones.
Cranial bones: Temporal bonePetrous portion(protects organs of hearing & balance)Contains bones of middle ear & nerves of inner ear.Internal auditory meatus:internal acoustic canal.
Occipital bone “back of the head
Occipital BoneForamen magnum:“large hole” for spinal cordOccipital condyles:frames foramen magnum (2). Articulates theskull with first cervical vertebraExternal occipital protuberance:knob in the junction of the baseand the posterior wallof the skull.External occipital crest(see previous slide)Nuchal lines: superior, inferiorBony regions that anchor muscles &ligaments of skull and the neck.(see previous slide)
Cranial bones: Occipital boneInternal occipital crest:inside skull, ridge thatbifurcates near the foramen magnum. (givesattachment to the falx cerebelli -part of meninges)Internal occipital protuberance:bump above crestHypoglossal canal:(#21 inferior view)hypoglossal nerve runs through (cranial nerve XII)Condyloid canal

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 65 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Summer
Professor
Kathy Hosseini

Newly uploaded documents

Show More

Newly uploaded documents

Show More

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture