Gross Anatomy Week 7 Lab Objectives

What is this?

Anterior Cranial Fossa

What is this?

Middle Cranial Fossa

What is this?

Posterior Cranial Fossa

What suture is this?

Coronal Suture

What suture is this?

Sagittal Suture

What suture is this?

Lambdoidal Suture

What suture is this?

Squamosal Suture

Supraorbital Margin- where the eyebrows are

Frontal Sinuses

Supraorbital Foramen

What passes through the supraorbital foramen?

Nerves and blood vessels

Meningeal Grooves

The meningeal arteries allow for the passage of what?

Meningeal Arteries

Foramen Magnum

What passes through the foramen magnum?

Where the brainstem passes and attaches to the spinal cord

What bone is this?

Occipital bone

Occipital Condyles

What articulates on the occipital condyles and what action does it do?

It is where the atlas articulates (to nod head)

Jugular Foramina

What nerve passes through the jugular foramina?

internal jugular veins and cranial nerves IX, X, XI (9,10,11 go to heaven)

Hypoglossal Canal

What nerve passes through the hypoglossal canal?

CN XII (hypoglossal nerve)

Basioccipital Region

What articulates at the basioccipital region?

It is where the occipital bone articulates with the sphenoid bone

What bone is this?

Sphenoid Bone

Greater wings of sphenoid bone

Lesser wings of sphenoid bone

What passes through the lesser wings?

the optic canals

Optic Canals

What passes through the optic canals?

the optic nerve; CN II (optic chiasm)

Superior Orbital Fissure

What passes through the superior orbital fissure?

passageways for blood vessels and cranial nerves III, IV, and VI, and V1

Body of Sphenoid Bone

The body of the sphenoid bone contains what?

sphenoid sinuses

Sella Turcica

What glans is housed in the sella turcica?

pituitary gland

Foramen Rotundum

The foramen rotundum is the opening for what cranial nerve?

the maxillary branch of CN V (V2)

Foramen Ovale

The foramen ovale is the passageway for what cranial nerve?

mandibular branch of CN V (V3)

Pterygoid Plate

What bone is this?

Ethmoid Bone

Crista Galli

A portion of the ___________ attaches to crista galli

dura mater

Cribriform Plate

What nerve passes through the cribriform plate?

Cranial Nerve I (olfactory nerve)

Perpendicular Plate

The vertical portion forms what?

nasal septum

Superior and middle nasal conchae

What are the ethmoid sinuses?

small cavities within the ethmoid bone that cannot be seen on the skull

Mastoid Process of the temporal bone

What bone is this?

temporal bone

The mastoid process of the temporal bone is the attachment site of what muscle?

sternocleidomastoid

Styloid process of temporal bone

How is the styloid process attached to the hyoid bone?

tendons and ligaments

Petrous Part

What does the petrous part contain?

auditory ossicles and structures of inner ear

external acoustic meatus

The external acoustic meatus is the opening for the ________?

ear canal

carotid canal

The carotid canal is the passage for _______?

internal carotid artery

zygomatic process of temporal bone

mandibular fossa

The mandibular fossa is the depression and articulation site for the ______ of the mandible

condylar process

internal acoustic meatus

What cranial nerves pass through the internal acoustic meatus?

cranial nerves 7 and 8 (7 and 8 help you hear great)

What bone is this?

Parietal Bone

Nasal bone

lacrimal bone

Palatine Bone

What bone is this?

zygomatic bone

Frontal Process of zygomatic bone

Zygomatic Arch

The zygomatic arch forms the _____ bone

cheek

Inferior Nasal Conchae

The nasal bone articulates with what?

both the frontal bone and maxilla

The lacrimal bone forms a portion of the _______ and contains the opening for the ______ duct

orbit; nasolacrimal

What are the functions of fontanels?

They are only in infant skulls and begin as membranous portions of the infant skull where parietal bones fuse with the adjoining bones

What are the names of the 6 fontaneles?

frontal, occipital, 2 sphenoid, and 2 mastoid

What is the only moveable bone in the skull?

the mandible

Condylar Process of the mandible

coronoid process of mandible

The condylar process articulates with the _________ fossa of the temporal bone to form the _______ joint

mandibular; temporomandibular (TMJ)

The coronoid process is the site of attachment for the _______ muscle

temporalis

Alveolar Region

The alveolar Region houses what?

tooth sockets for upper dentition

Angle of the mandible

Mental Foramina