Osteology Quiz 2

frontal squama

a thick, scalelike plate of bone that forms the forehead

frontal boss

2 eminences marking original centers of ossification

superciliary arches

brow ridges

supraorbital margins

the superior rim of the eye sockets.

supraorbital notch/foramen

the exit point for the supraorbital nerve and vessels

zygomatic process of frontal

part of frontal bone reaching zygomatic bone

lacrimal fossa

Anterior and lateral depression of roof of orbit which accommodates the lacrimal gland

frontal crest

midline crest confluent with the anterior end of the sagittal sulcus

foramen ovale

Small pitlike depression located where the sulcus terminalis points backward toward the pharynx.

horizontal portion

acts to roof the orbits and to floor the frontal lobes of the brain

sagital sulcus

depression in endocranial collotte from brainstem

ethmoidal notch

the gap separating the two orbital plates of the frontal

frontal sinus

cavity within the frontal bone located behind glabella

frontal angle

located at bregma

sphenoidal angle

located at pterion

mastoid angle

located at asterion

occipital angle

located at lambda

parietal boss

large eminence marking original center of ossification

parietal striae

ectocranial striations near squamosal suture

temporal lines

lateral lines that mark the attachment of the temporalis muscle aka Big jaw muscle (Frontal)

meningeal grooves

indentations for the passage of the meningeal arteries

Sagittal sulcus of parietal

made when the parietals are articulated and the shallow grooves along the sagittal edge of each parietal combine along the endocranial midline

sagittal sulcus of frontal

vertical groove that runs down the midline of the endocranial surface

temporal squama

the thin, flat portion of the temporal bone that forms the anterior and superior part of the temple

external auditory meatus

ear hole

suprameatal crest

superior root of zygomatic process

supramastoid crest

Posterior extension of the suprameatal crest

zygomatic process of the temporal

articulates with the temporal process of zygomatic bone to form zygomatic arch

styloid process

pole-like process extending downward from the temporal bone on each side of the skull

mastoid process

round projection on the temporal bone behind the ear

TMJ

temporomandibular joint

postglenoid process

sharp ridge posterior to articular fossa

auditory ossicles (malleus, incus, stapes)

three small bones linked together that connect the eardrum to the inner ear

petrous pyramid

Endocranial, triangle shaped, houses auditory ossicles

jugular fossa

dips that are lateral jugular foramina

internal auditory meatus

Passageway for nerves and vessels that supply the ear.

sigmoid sulcus (temporal)

Large curving groove set at the posterior base of the petrous pyramid on the endocranial surface of the mastoid part of the temporal bone

mastoid foramen

Mastoid emissary vein from sigmoid sinus and meningeal branch of occipital artery

digastric groove/mastoid notch

groove medial to mastoid process

stylomastoid foramen

cranial nerve passageways between mastoid process and styloid process

jugular foramen

formamen under the justula fossa

carotid canal

passageway for internal carotid artery

basilar portion

occipital bone

squamous portion

occipital bone

lateral condylar portions

occipital

external occipital protuberance

bump on back of head (Inion)

external occipital crest

extends downward from the external occipital protuberance

superior and inferior nuchal lines

extend laterally from the external occipital protuberance

occipital condyle

ridges on left and right of foramen magnum

condylar foramas (canal)

jugular notch

occipital bone

cruciform eminence

internal occipital crest

a ridge that is important in anchoring blood vessels and membranes that stabilize the position of the brain

Occipital (sagittal) sulcus

for sagittal sinus

transverse sulci

Form the transverse arms of the cruciform eminence

House the transverse sinuses

internal occipital protuberance

lies at the center of the cruciform eminence

hypoglossal canal

hypoglossal nerve

alveolar processes

A bony ridge found on the inferior surface of the Maxilla and the superior surface of the Mandible which contains the sockets for the teeth.

alveoli

teeth roots

canine jugum

bony eminence over the maxillary canine root on the facial surface of the maxilla

zygomatic process of maxillae

articulates with zygomatic bone

infraorbital foramen

canine fossa

an indentation on the maxilla above the root of the canine

anterior nasal spine

frontal process

anterior lacrimal crest

palatine process

incisive foramen of maxilla

upper pallet hole, one closest to the teeth (incisors)

incisive canal

maxillary sinus