Cranial Bones

Question 1

Cranial Bones (Info)

Answer 1

• Protect the brain
• Stabilize the brain’s position by the attachment of the inner membrane
  (meninges) to the bones
• External surface provides muscle attachments for cranial and facial
  musculature
• The bones of the cranium are flat bones

Question 2

Frontal Bone

Palpable Landmarks

(6)

Answer 2

• Glabella
• Supraorbital Ridge
• Supraorbital Notch
• Supratrochlear Foramen
• Frontal Squamous
• Superior/Inferior Temporal Lines

Question 3

Frontal Bones

Non-Palpable Landmarks

(5)

Answer 3

• Orbital Surface
• Frontal Crest
• Groove for Superior Sagittal Sinus
• Grooves for Anterior Meningeal Arteries
• Frontal Sinus

Question 4

Ethmoid Bone

Non-Palpable Landmarks

(5)

Answer 4

• Crista Galli
• Cribiform Plate
• Perpendicular Plate
• Nasal Conchae: Superior and Inferior
• Ethmoid Sinuses

Question 5

Parietal Bone

Palpable Landmarks

(2)

Answer 5

• Temporal Lines: Superior and Inferior

Question 6

Parietal Bone

Non-palpable Landmarks

(1)

Answer 6

• Grooves for Meningeal Arteries

Question 7

Occipital Bone

Palpable Landmarks

(5)

Answer 7

• Nuchal Lines: Superior and Inferior
• Planum Nuchae
• Occipital Squamous
• External Occipital Crest
• External Occipital Protuberance

Question 8

Occipital Bone

Non-Palpable Landmarks

(8)

Answer 8

• Occipital Condyles: Occipital Articulating Facets
• Basilar Part
• Clivus
• Grooves for Venous Sinuses: Occipital, Transverse, Superior Sagittal, Inferior Petrosal, Sigmoid
• Grooves for Posterior Meningeal Arteries
• Foramen: Jugular Foramen, Hypoglossal Canal, Foramen Magnum
• Internal Occipital Crest
• Internal Occipital Protuberance

Question 9

Temporal Bone

Palpable Landmarks

(9)

Answer 9

• External Auditory
• Mastoid Process
• Styloid Process
• Squamous Portion
• Mastoid Portion
• Zygomatic Process – makes up Zygomatic arch
• Articular Tubercle
• Temporal Fossa
• Mendibular Fossa

Question 10

Temporal Bone

Non-Palpable Landmarks

(5)

Answer 10

• Internal Auditory Meatus
• Petrous Portion
• Jugular Foramen
• Grooves for Sinuses: Superior Petrosal, Sigmoid
• Grooves for Arteries: Middle Mengineal Arteries, Middle Temporal Artery

Question 11

Sphenoid Bone

Palpable Landmark

(1)

Answer 11

• Greater Wings

Question 12

Sphenoid Bone

Non-Palpable Landmarks

(14)

Answer 12

• Lesser Wings
• Infratemporal Crest
• Pterygoid Processes: Medial Plate – Hamulus, Lateral Plate
• Chaismatic Groove
• Clivus
• Sella Turcia
• Jugum
• Superior Orbital Fissure
• Inferior Orbital Fissure
• Orbital Surface
• Optic Foramen
• Sphenoid Sinuses
• Grooves for Arteries
• Foramen