Skull Bones, Structures, Sutures

Lateral Margin of Orbit

1. Formed by extensions of the Frontal and Zygomatic Bones (Zygomaticofrontal Process). 2. Lies on Side of the Head. 3. Anterior Edge Dips Concavely between Forehead & Cheek. 4. Edge of Lateral Rim is Posterior to Medial Rim; Due to Bilateral Curvature of the Face.

Mental Foramen

A small round radiolucent area located in the apical region of the mandibular

Coronoid Process

Anterior, non-articulating process of the ramus of the mandible which serves as the insertion for the temporalis muscle.

Coronal Suture

Between frontal and parietal bone

Inferior Nasal Concha

Bone that protrudes into the inferior part of the nasal cavity; also known as the inferior turbinate bone

Zygomatic Arch

Bridge-shaped structure that connects the Temporal Bone to the Zygomatic Bone

External Occipital Protuberance

Bump on back of occipital bone

External Acoustic Meatus

Canal leading to eardrum and middle ear: tympanic region marking of the temporal bone

Mandibular Fossa

Deep concavity in the temporal bone at the root of the zygomatic arch that receives the condyle of the mandible

Maxilla Orbit

Floor or inferior wall of the orbit

Jugular Foramen

Foramen between the occipital and temporal bones near the styloid process.

Frontal Bone

Forms the forehead

Zygomatic Process of Temporal Bone

Horizontal protrustion off of the anterior side of the temporal bone that connects with the zygomatic

Squamosal Suture

Joint separation between the Parietal Bone and Temporal Bone of the skull

Lambdoidal Suture

Joint separation between the Parietal and Occipital

Zygomatic Orbit

Lateral wall in orbit near zygomatic bone

Mandible

Lower jaw bone

Ethmoid Orbit

Medial wall of orbit, posterior to the lacrimal bone

Sagittal Suture

Midline articulation point of the two parietal bones

Stylomastoid Foramen

Opening between the styloid process and mastoid process

Supraorbital Foramen

Opening superior to each eye socket

Lacrimal Orbit

Orbit of eye near nasal bone

Mandibular Foramen

Paired opening on the medial surface of the mandibular ramus

Occipital Condyle

Paired rounded process lateral to the foramen magnum

Foramen Lacerum

Posterior & Lateral to the Foramen Ovale, Cartilage runs through it

Sphenoid Orbit

Posterior portion, part of the roof and lateral wall of the orbit

Styloid Process

Projection inferior to external acoustic meatus: attachment points for muscle and ligaments of the neck

Perpendicular Plate of the Ethmoid bone

Projects downward from the crista galli of the ethmoid bone; makes up the superior nasal septum

Temporal Process of the Zygomatic Bone

Projects posteriorly & articulates with the zygomatic process of the temporal bone forming the zygomatic arch

Superior Nuchal Line

Ridge that runs horizontally from the external occipital protuberance

Mastoid Process

Round projection (process) on the temporal bone behind the ear.

Frontal Orbit

Superior orbital wall

Palatine Bone

The bone which forms part of the hard palate of the mouth, part of the nasal cavity, and part of the orbital cavities.

Supraorbital Margin

The superior rim of the eye socket located on the frontal bone.

Ethmoid Bone

Thin, delicate bone that supports the nasal cavity and forms part of the orbits of the eye.

Infraorbital Foramen

This foramen is found in the maxillary bone, just inferior to the orbit.

Foramen Ovale

This foramen is found in the sphenoid bone on the middle fossa of the cranium.

Parietal Bone

Two bones between the frontal and occipital; on the side and top of the cranium

Maxilla Bone

Upper Jaw Bone

Ramus

Vertical portion of the mandible.

Vomer

bone that forms posterior/inferior part of the nasal septal wall between the nostrils

Hypoglossal foramen

hole between jugular foramen and foramen magnum

Carotid foramen

holes where carotid artery enters skull from throat

Temporal Bone

located below each parietal bone forming the lower sides and the base of the skull

Mandibular Notch

notch / groove between the mandibular condyle and the coronoid process

Zygomatic Bone

the arch of bone beneath the eye that forms the prominence of the cheek

Sphenoid Bone

the bat-shaped bone that extends behind the eyes and forms part of the base of the skull

Occipital Bone

the bone found at the back and base of the skull

Mandibular Condyle / Condylar Process

the condyle of the ramus of the mandible that articulates with the skull