General Anatomy Lec - Skull Landmarks

Frontal bone

Frontal bone

Parietal bones (2)

Temporal Bones (2)

Occipital Bone

Sphenoid Bone

Ethmoid Bone

8

How many bones make up the skull?

7

How many bones make up the orbit?

Frontal (roof of the orbit)
Sphenoid (posterior edge)
Palatine (part of the floor)
Maxillary bone (floor)
Zygomatic bone (lateral edge)
Ethmoid (medial edge)
Lacrimal bone (medial edge)

Which bones make up the orbit?

8 total

Frontal
parietal (2)
Temporal (2)
Occipital
Sphenoid
Ethmoid

Which bones make up the skull?

Sagittal suture

connects the parietal bones

Name the suture.

This suture connects?

Lambdoid suture

connects the parietal, temporal, and occipital bones

Name the suture.

This suture connects?

Coronal suture

frontal and parietal bones

Name the suture.

This suture connects?

Squamosal suture

connects parietal, temporal, and sphenoid bones

Name the suture.

This suture connects?

Pterion

"H" shaped formation of sutures in the temporal fossa

Unites
- frontal
- parietal
- sphenoid
- temporal

This structure is called?

- Unites which 4 bones?

Anterior
Middle
Posterior

What are the 3 cranial fossa?

Lesser wing of the sphenoid bone.

Anterior cranial fossa's posterior border is the?

Petrous ridge of the temporal bone

Middle cranial fossa's posterior border is the?

Ethmoid bone

Forms most of the upper part of the nasal cavity

crista galli of ethmoid bone

cribriform plate of ethmoid bone

orbital plate of ethmoid bone

Sphenoid bone

Greater wing of sphenoid bone

Lesser wing of sphenoid bone

Pterygoid Process

*Keep in mind that this picture only shows the lateral side of the pterygoid process.

*The process itself includes the lateral and medial aspects.

lateral pterygoid plate of pterygoid process

medial pterygoid plate of pterygoid process

Pterygoid fossa

Pterygoid hamulus

Sphenoid bone

Except for pterygoid fovea which is on the mandible.

All of the "pterygoid" stuff is part of which bone?

What's the exception? Where is that located (which bone)?

Squamous part of temporal bone

Petrous (petromastoid) part of temporal bone

mastoid process of temporal bone

styloid process of temporal bone

External auditory (acoustic) meatus of temporal bone

Mandibular fossa of temporal bone

Articular eminence of temporal bone

Internal auditory (acoustic) meatus

14 total

Lacrimal (2)
Nasal (2)
Maxillae (2)
Zygomatic bones (2)
Mandible (1)

Palatine bones (2)
Inferior nasal conchae (2)
Vomer (1)

How many facial bones?

Name them.

Lacrimal bones (2)

how many

Nasal bones (2)

how many

Maxillae (2)

how many

Mandible (1)

how many

Palatine bones (2)

how many

Inferior nasal conchae (2)

how many

Vomer (1)

alveolar process of maxilla

Palatal process of maxilla

which landmark of which bone

frontal process of maxilla

Maxillary tuberosity of maxilla

Canine ridge of maxilla

Incisive fossa of maxilla

incisive foramen of maxilla

Canine fossa of maxilla

Horizontal plate of palatine bone (forms part of palate)

Part of a bone

Vertical plate of palatine bone (forms part of lateral wall of nasal cavity)

Anterior nasal spine

Supraorbital notch/foramen

Infraorbital foramen

Mental foramen

Nasolacrimal duct

Zygomatic arch

temporal and zygomatic bones make up this arch.

This structure is composed of what 2 bones?

Palatine process of maxilla

Name the landmark on this bone

Spine of sphenoid

Occipital condyles

Mastoid notch (also known as digastric notch)

Greater palatine foramen

1

Lesser palatine foramen

2

superior orbital fissure

inferior orbital fissure

Foramen rotundum

Foramen ovale

Foramen spinosum

Jugular Foramen

Carotid canal

Stylomastoid foramen (literally between the styloid process and mastoid process)

Hypoglossal canal

Foramen magnum

Optic canal

Zygomaticofacial foramen
Zygomaticotemporal foramen

Know these locations

Anterior Ethmoidal foramen

Posterior Ethmoidal foramen

Infraorbital canal/groove

External occipital protuberance

Superior nuchal lines

Inferior nuchal lines

Condyle or condylar process of mandible

Pterygoid fovea of mandible

Neck of mandible

Coronoid process of mandible

Mandibular notch of mandible

Ramus of mandible

Body of mandible

Lingula of mandible

mylohyoid groove of mandible

mylohyoid line of mandible

Submandibular fossa of mandible

below mylohyoid line

Sublingual fossa of mandible

above mylohyoid line

External oblique line/ridge of mandible