Lab 14: The Skull

1

Frontal bone

2

Nasal bone

3

Zygomatic bone

4

Infraorbital foramen

5

Maxilla

6

Mandible

7

Middle nasal concha (of ethmoid bone)

8

Inferior nasal concha

9

Mental foramen

1

Parietal bone

2

Squamous suture

3

Temporal bone

4

Lambdoid suture

5

Occipital bone

6

External acoustic meatus

7

Mastoid process

8

Mandibular condyle

9

Coronal suture

10

Frontal bone

11

Zygomatic process (of temporal bone)

12

Zygomatic bone

13

Maxilla

14

Mental foramen

15

Mandible

1

Maxilla

2

Zygomatic bone

3

Sphenoid bone

4

Temporal bone

5

Occipital bone

6

Incisive foramen

7

Palatine process of maxilla

8

Palatine bone

9

Vomer bone

10

Occipital condyle

11

Foramen magnum

1

Frontal bone

2

Temporal bone

3

Parietal bone

4

Occipital bone

5

Ethmoid bone

6

Sphenoid bone

7

Sella turcica

8

Foramen magnum

1

Frontal sinus

2

Ethmoid sinuses

3

Maxillary sinus

1

Frontal

2

Superior orbital fissure

3

Sphenoid

4

Zygomatic

5

Palatine

6

Maxilla

7

Superior orbital notch

8

Optic foramen/canal

9

Ethmoid

10

Nasal

11

Lacrimal fossa

12

Perpendicular plate

13

Inferior nasal concha

14

Vomer

What bones and their features compose the temporomandibular joint (TMJ)?

Temporal bone, mandible, internal acoustic meatus, and mandibular foramen.

Forms sagittal, coronal, squamous, and lambdoid sutures

Parietal bone

Cribriform plate

Ethmoid bone

Crista galli

Ethmoid bone

External acoustic meatus

Temporal bone

Foramen magnum

Occipital bone

Mandibular fossa

Temporal bone

Mastoid process

Temporal bone

Middle nasal concha

Ethmoid bone

Occipital condyle

Occipital bone

Perpendicular plate

Ethmoid bone

Sella turcica

Sphenoid bone

Styloid process

Temporal bone

Supraorbital foramen

Frontal bone

Name six cranial bones that are visible on a lateral view of a skull

Frontal bone, parietal bone, temporal bone, occipital bone, mandible, maxilla

What suture joins the frontal bone to the parietal bones?

The coronal suture

The parietal bones are firmly interlocked along the midline by what suture?

The squamous suture

What suture joins the parietal bones to the occipital bone?

Lambdoid suture

The temporal bones are joined to the parietal bones along the what suture?

Squamous suture

Name the three cranial bones that contain sinuses

Frontal bone, sphenoid bone, ethmoid bone

Name a facial bone that contains a sinus

Maxilla

Provide the functions of the paranasal sinuses

It provides a buffer against facial trauma and insulates sensitive structures.

Forms bridge of nose

Nasal bone

Only movable bone in the facial skeleton

Mandible

Contains coronoid process

Mandible

Creates prominence of cheek inferior and lateral to the eye

Zygomatic bone

Contains sockets of upper teeth

Maxilla

Forms inferior portion of nasal septum

Vomer bone

Forms anterior portion of zygomatic arch

Zygomatic bone

Scroll-shaped bone in nasal passage

Vomer bone

Forms anterior roof of mouth

Maxilla

Contains mental foramen

Mandible

Forms posterior roof of mouth

Palatine bone

Small bone in medial wall of orbit

Lacrimal bone

Forms a very small portion of inferior orbit

Palatine bone

Contains large sinus inferior to orbit

Maxilla

What bones may be displaced in a person who has a deviated septum? Explain possible consequences of this condition.

The vomer bone and the nasal concha. Possible consequences include sinus infections, nose bleeding, and difficulty breathing.

Assume that an orbit of a skull was damaged in an accident. Which bones of a skull might need to be considered for reconstruction in an orbital surgery?

Ethmoid, sphenoid, zygomatic bone, frontal bone, palatine bone, and the lacrimal bone.