Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) –...

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Chapter 11 Cranium Part 1

Transcript of Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) –...

Page 1: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Chapter 11

Cranium

Part 1

Page 2: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Cranial Bones

• Skull = __________ and ________ bones

• Cranium (8 bones)– Area that surrounds and protects the brain.– ____________ (Skull Cap)– Floor

Page 3: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Calvarium

• __________

• Parietal (Right and Left)

• __________

Page 4: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Frontal Bone

• ____________ (Vertical) Portion– Forehead

• ___________ (Horizontal) Portion– Superior Orbits

Page 5: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Frontal BoneSquamous

• ___________– Area between eyebrows

• _____________ Groove– Depression above eyebrows

• ______________margin– Superior rim of orbit

• _____________ ridge (Arch)– Ridge beneath eyebrow

Page 6: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Frontal BoneOrbital

• _____________plate– Superior portion of each orbit

• _______________ Notch– Separates orbital plate

• Articulates with 4 cranial bones– Right and left parietals, sphenoid, _________

Page 7: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Parietal Bones

• Forms the __________calvarium.

• Articulates with 5 cranial bones – Frontal, occipital, temporal, sphenoid, parietal

Page 8: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Occipital Bone

• ___________portion of the calvarium.

• Squamous Portion

• _______________Protuberance (Inion)– Prominent bump on the back of head.

Page 9: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Occipital

• ____________Magnum– Hole for spinal cord

• _______________ condyles– Articulating surface on each side of foramen

magnum.

• Articulates with 6 bones– 2 parietals, 2 temporals, sphenoid, ________

Page 10: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Cranial Floor

• Temporal (Right and Left)

• __________

• Ethmoid

Page 11: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Temporal Bone

• Lateral aspect of skull.

• 3 Portions– ___________– ___________– ___________

Page 12: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Temporal Squamous Portion

• Vertical aspect and very thin.

• _______________– Articulates with Zygoma– ____________

Page 13: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Temporal Mastoid Portion

• Posterior to ___________

• _____________

• Mastoid Tip

Page 14: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Temporal Petrous Portion

• Houses hearing and equilibrium

• _______________– Petrous Ridges

• _______________Meatus– Opening for the nerves of hearing and equilibrium

• ________________

Page 15: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Sphenoid

• Centrally located. Anchors all 7 cranial bones.

• _______________(Turk’s Saddle)– Houses _______________– __________sellae – Posterior wall of sella– _____ – Depression posterior to dorsum sella. – Posterior clinoid – Anterior clinoid

Page 16: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Sphenoid

• ___________ Wings– Anterior clinoid

• ___________ Wings – Forms portion of floor and walls of cranium

Page 17: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Sphenoid

• Lateral ______________– Lateral downward projections

• Medial ________________– Medial downward projections

• ___________ hamuli– Process off of medial pterygoid

Page 18: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Sphenoid Foramen

• Foramen ____________

• Foramen ____________

• Foramen ____________

Page 19: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Sphenoid Optic Components

• Optic __________ (Chiasm) – Groove between Anterior body and lesser wings

• Optic ___________– Hole between anterior body and lesser wings

• Superior ______________– Space lateral to optic foramen between lesser and

greater wings

Page 20: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Ethmoid Bone

• Small bone lying primarily below floor of cranium.

• Articulates with 2 cranial bones.

• ____________– Horizontal portion

• ____________– Superior projection from cribriform plate into frontal

bone

Page 21: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

More Ethmoid

• _________________ plate– Downward projection forms nasal septum

• Lateral _____________ (masses)– Suspend from cribiform

• Nasal ___________(Turbinates)– Downward projection from labyrinth

Page 22: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Sutures

• Areas of cranial fusion– Synarthrodial

• __________ suture– Fuses Parietal to Frontal bone

• ___________suture– Fuses right and left Parietal

• __________suture– Fuses Parietal to Occipital

• __________ suture– Fuses Parietal to Temporal

Page 23: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Fontanels

Membrane area as a Child• Anterior

• Posterior

• Sphenoid (2)

• Mastoid (2)

Page 24: Chapter 11 Cranium Part 1. Cranial Bones Skull = __________ and ________ bones Cranium (8 bones) – Area that surrounds and protects the brain. –____________.

Suture Articulations Adult

• ____________– Frontal and parietals

• ____________– Occipital and parietals

• ___________ Rt/Lt– GW of sphenoid, temporal, parietal, frontal

• ___________ Rt/Lt– Temporal, occipital, parietal


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