A&P Cranium

The Cranium/Skull

The calvaria

Brain box/Neurocranium

Consists of 14 bones

Viscerocranium

The facial skeleton

Contains 14 bones

Maxilla L and R

Zygomatic L and R

Nasal bones L and R

Vomer

Inferior nasal concha L and R

Lacrimal bones L and R

Mandible

Palatine Bones L and R

Which method to view the skull is this?

Superior or norma verticalis

Which method to view the skull is this?

Occipitalis or posterior view

Which method to view the skull is this?

Lateral view or norma lateralis

Which method to view the skull is this?

Anterior view or normal frontalis

Which method to view the skull is this?

Inferior view or normal basalis

Coronal suture

Separates the frontal and 2 parietal bones

Sagittal suture

Between the two parietal bones

Lambdoid suture

Between the occipital and two parietal bones

What is represented by the arrow?

Metopic suture

Separates two halves of the frontal bones

Fuses together at around 6 years old

3 to 8% of people still got it

Vertex

Highest point on sagittal suture

Tippity top of the head

Bregma

Meeting point of coronal and sagittal sutures

Lambda

Between the sagittal and lambdoid sutures

The parietal foramen

One on each parietal bone

2.5 to 4cm infront of the lambda

Obelion

Point on sagittal suture between the parietal foramen

Asterion

Superior temporal line

Inferior temporal line

Occipitomastoid suture

External acoustic meatus

Styloid process

Pterion

Squamous process of temporal bone

Petrous portion of temporal bone

Mastoid portion of temporal bone

Tympanic part of temporal bone

Forms the floor and walls of external auditory meatus

Internal acoustic meatus

Facial nerve (CN VII), vestibulocochlear nerve (CN VIII), and the labyrinthine artery pass through here

Squamous suture

Coronal suture

Sphenofrontal suture

Sphenosquamosal suture

Occipitomastoid suture

Lambdoid suture

Anterolateral (Sphenoid) fontanelle

Fuses at 3 months

Anterior fontanelle

Fuses at 18 months

If fused too early can cause infant retardation

Posterior fontanelle

Fuses at 3 months

Posterolateral (Mastoid) fontanelle

Fuses at 12 months

Which region does the arrow denote?

Frontal region

Which region does the arrow denote?

Orbital openings

Which region does the arrow denote?

Nasal openings

Which region does the arrow denote?

Lower face

Glabella

Depressed region between eye brows

Orbital part of frontal bone

Forms roof of the eye socket

Forms floor of cranial fossa

Zygomatic process of frontal bone

Connects frontal bone to zygomatic bone

Forms part of lateral orbital wall

Supraorbital notch

Small groove or notch above the orbit

Helps attachment of muscles and nerves

Condylar process

Contains head and neck regions

Ramus

Angle

Oblique line

Mandibular notch

Coronoid process

Alveolar process (Bearing teeth)

Body

Mental foramen

Mental prominence

Base

Temporomandibular joint

Only synovial joint in the skull

Permits movement in three planes

Involves: Head of mandible, articular tubercle of the temporal bone, and the mandibular fossa

Internasal suture

Frontonasal suture

Nasomaxillary suture

Lacrimomaxillary suture

Frontomaxillary

Interomaxillary suture

Zygomaticomaxillary suture

Parietal bones

Occipital bone

Temporal bone (Exterior)

Mastoid process of temporal bone

Foramen magnum (Posterior view)

External occipital protuberance

Superior nuchal line

Occipital condyle

Zygomatic bone

Condylar canal

Lateral part

Pharyngeal tubercle

Squamous part

Occipital condyle

Basilar part

Squamous part of occipital bone

Superior nuchal line

Occipital Condyle

External occipital crest

External occipital protuberance

Sagittal suture

Parietomastoid suture

lambdoid suture

Occipitomastoid suture

Anterior part of inferior skull

Middle part of inferior skull

Posterior part