VS 6100 Lab - Human Skull Structures

Bones visible in norma verticalis

Frontal, occipital, parietal bones (2)

Notable sutures visible in norma verticalis

Coronal, sagittal, lambdoid

Which foramen is visible in norma verticalis

Parietal foramen

What craniometric points are visible in Norma verticalis?

Bregma, lambda, vertex

Coronal suture

the suture between the parietal and frontal bones of the skull

Sagittal suture

between parietal bones

Lambdoid suture

between parietal bones and occipital bone

What are craniometric points?

Where sutures intersect

Bregma craniometric point

junction of coronal and sagittal sutures

Lambda craniometric point

junction of sagittal and lambdoidal sutures

Vertex of skull

highest point of the skull

Bones visible in Norma dorsalis

Parietal bones (2), occipital bone, temporal bones (2)

Sutures visible in norma dorsalis

Sagittal, lambdoid, parietomastoid, occipitomastoid

parietomastoid suture

the junction between the parietal and temporal bones

Occipitomastoid suture

connects occipital and mastoid process of temporal bone

Foramen visible in norma dorsalis

Parietal foramen (2)

Craniometric points visible in Norma dorsalis

Lambda, asterion

Asterion craniometric point

Junction of occipitomastoid suture, parietomastoid, and lambdoid sutures

Other notable features visible in norma dorsalis

Superior nuchal line, inferior nuchal line, external occipital crest, external occipital protuberance

Superior nuchal line

runs horizontally from external occipital protuberance

Inferior nuchal line

Bony landmark on occipital bone

External occipital crest

extends downward from the external occipital protuberance

External occipital protuberance

bump on back of head

Inion

the highest point of the external occipital protuberance

Bones visible in norma lateralis

Frontal, parietal (2), temporal (2), occipital, zygomatic (2), maxillary (2), mandible, nasal (2), sphenoid, ethmoid, lacrimal (2)

Where are the attachment sites for the temporalis muscle?

Superior and inferior temporal lines on parietal bone

What is the superior portion of the temporal bone called?

Squamous portion

What is the inferior portion of the temporal bone called?

Mastoid portion

Sutures visible in norma lateralis view

-coronal, lambdoid, squamous, parietomastoid, occipitomastoid, sphenosquamosal, sphenoparietal, sphenofrontal, sphenozygomatic, zygomaticotemporal, zygomaticofrontal, zygomaticalmaxillary

Openings visible in norma lateralis

External acoustic meatus, mental foramen, zygomatic foramen

Other notable features of Norma lateralis

Temporal fossa, infratemporal fossa, zygomatic arch, asterion, Pterion

Pterion

Area in temple region where squamousal, sphenosquamosal, sphenoparietal, sphenofrontal, and coronal sutures all join

What is unique about the Pterion?

Very thin, weakest portion of the skull

Mental foramen

Contains mental nerve

Zygomatic foramen

Contains zygomatic nerve

External acoustic meatus

Conducts sound waves from auricle to tympanic membrane

Mandibular foramen

Contains mandibular nerve