Anatomy for skull, sinus, facial bone, specialty views

Bones of the skull that are thin, flat, and consist of three layers

Cranial Bones

Formed by the vertical portion of the frontal bone

Frontal squama

Landmark located between the superciliary ridges

Glabella

Opening in the frontal bone for nerves and vessels

Supraorbital Foramen

Bone that contains the cribriform plate, crista galli, and labyrinths

Ethmoid Bone

Vertical portion of the ethmoid bone that forms the superior bony nasal septum

Perpendicular Plate

Small projections of the ethmoid bone

Superior and Middle Nasal Conchae (turbinates)

Widest point and bulge of the head located on the parietal bones

Parietal Eminence

Large opening in the occipital bone for the medulla oblongata

Foramen Magnum

Bone that houses the pituitary gland

Sphenoid Bone

Part of the sphenoid bone containing the optic foramen

Lesser Wings

Bony process of the temporal bone located behind the ear

Mastoid Process

Densest part of the cranium containing hearing and balance organs

Petrous Portion

Suture separating the frontal bone from the two parietal bones

Coronal Suture

Suture separating the two parietal bones at the midline

Sagittal Suture

Suture separating the parietal bones from the occipital bone

Lambdoidal Suture

Anterior junction of the sagittal and coronal sutures

Bregma

Posterior junction of the sagittal and lambdoidal sutures

Lambda

Skull shape where petrous pyramids form a 47 degree angle to the MSP

Mesocephalic

Skull shape where petrous pyramids form a 40 degree angle to the MSP

Dolichocephalic

Skull shape where petrous pyramids form a 54 degree angle to the MSP

Brachycephalic

The largest paranasal sinuses

Maxillary Sinuses

Alternative name for the maxillary sinus

Antrum of Highmore

Sinuses located in the body of the sphenoid bone

Sphenoid Sinuses

Sinuses with irregular walls that give the voice resonance

Frontal Sinuses

Acute bacterial inflammatory disease causing localized pain and fever

Sinusitis

Necessary patient position to visualize air-fluid levels in the sinuses

Upright

By what age is the skull done growing?

12

Cranial bones are subdivided into

Calvaria and floor

What makes up the calvaria?

Frontal, occipital, left and right parietal bones

What makes up the floor?

Ethmoid, sphenoid, right and left temporal bones

The vertical portion of the frontal bone

Frontal squama

What are the structures 1

Crista galli

Projection of cribiform plate

Crista galli

Fibrous joints that connect bones of the skull

Sutures

What is this?

Frontal sinuses

What is this?

Sphenoid sinuses

What is this?

Ethmoid sinuses

What is this?

Maxillary sinuses

What is the largest sinus?

Maxillary sinus

Most people have ___ pairs of paranasal sinuses, being ___ in total

4 pairs, 8 total

Areas of incomplete ossification in infant skulls (soft spots)

Frontanels

What is 1

Frontal sqauma

What is 2

Supraorbital foramen

What is 3

Supraorbital margin

What is 4

Glabella

What is 5

Nasal spine

What is 6

Frontal eminence

What is 7

Supercilliary arch

What is 1

Intersinus septum

What is 2

Frontal sinuses

What is 3

Sphenoid sinuses

What is 4

Ethmoidal sinuses

What is 5

Maxillary sinuses

What is 1

Squamous portion

What is 2

Petrous portion

What is 3

Mastoid portion

What is 4

Styloid process

What is 1

Squama

What is 2

Condylar canal

What is 3

Basilar portion

What is 4

Inion

What is 5

Foramen magnum

What is 6

Occipital condyle

What is 1

Frontal bone

What is 2

Parietal bone

What is 3

Spehnoid bone

What is 4

Temporal bone

What is 5

Mastoid process

What is 1

Glabella

What is 2

Pterion

What is 3

Bregma

What is 4

Coronal suture

What is 5

Styloid process

What is 6

EAM

What is 7

Asterion

What is 8

Lambda

What is 9

Lambdoidal suture

What is 10

Occipital bone

What is 11

External occipital protuberance (Inion)

What houses the pituitary gland

Sella turcica

What view do we take to see the optic canal

Rhese

What view do we use to see the IAC?

Stenvers

In the squamous portion of the temporal bone, what is the prominent arched process?

Zygomatic process

What bone do the petrous ridges reside?

Temporal bone

What view do we use to see the orbits without superimposition of the petrous ridges?

PA axial and waters view

What view do we use to see all 4 sinuses?

Lateral skull

What view do we use to see the frontal sinus?

PA sinus

The 14 bones that form the structural framework of the face

Facial Bones

Bone that articulates with all other facial bones except the mandible

Maxilla

Facial bone that contains the large maxillary sinus

Maxilla

Process of the maxilla that forms the anterior 3/4 of the roof of the mouth

Palatine Process

Inferior borders of spongy bone on the maxilla that support the teeth roots

Alveolar Process

Landmark located at the level of the anterior nasal spine

Acanthion

Two L shaped bones that complete the posterior 1/4 of the bony palate

Palatine bones

Bones that form the prominence of the cheeks and part of the orbital floor

Zygomatic Bones

Structure formed by the temporal process of the zygoma and zygomatic process of the temporal bone

Zygomatic Arch

The two smallest bones in the skull, located in the medial wall of the orbits

Lacrimal Bones

Two small, thin bones that form the superior bony wall of the nasal cavity

Nasal Bones

Landmark at the junction of the nasal bones and the frontal bone

Nasion