The Skull Flashcards
Two components of the skull
- Facial Skeleton (Viscerocranium)
2. Cranial Vault (Neurocranium)
How many bones in the facial component
14
How many bones in the cranial component
8
Frontal Bone
Parietal Bone
Orbit
Lacrimal
Temporal
Mandible
Maxilla
Zygomatic Bone
Nasal bones
Which bones cannot be seen from a frontal view?
the occipital bone and the palatine bones
Only bone not directly attached to the skull
the mandible
How many teeth do the maxilla and mandbile contain?
16 each
The maxilla and mandible each feature an ____________ which contains the teeth
alveolar process
Superior orbital notch (or foramen)
Inferior orbital foramen
Mental foramen
What do foramina allow?
the passage of nerves
Sphenoid
Nasal
Orbit
Maxilla
Mandible
Styloid process
Mastoid process
Occipital
Frontal
Parietal
Temporal
Zygoma
The zygomatic arch is made up of:
the temporal process of the zygomatic bone and the zygomatic process of the temporal bone
What part of the sphenoid bone do we see in the lateral view?
The greater wing (above the zygomatic arch) and the lateral pterygoid plate (below the zygomatic arch)
What are the sections of the temporal bone? (2)
- The squamous (flat) section above
2. The petrous (not flat) section below
What makes up the temporal fossa? (3)
The squamous temporal bone with the greater wing of the sphenoid bone and the lower portion of the parietal bone make up the depression
What is the name of the ‘ear hole’ on the temporal bone?
The external acoustic meatus
Coronal suture
Where the frontal bone joins the parietal bone
Lambdoid suture
Where the parietal bone is united with the occipotal bone
Pterion
The area where the parietal, frontal, sphenoid and temporal bones join
Saggital suture
Where the paired parietal bones unite
Superior nuchal line
a feature of the occipital bone for muscle attachement
Occipital condyles articulate with
the atlas at the atlanto-occipital joint
Foramen magnum
- Located between the condyles
- Spinal cord passes through it
3 main sutures of the cranium
- Coronal
- Sagittal
- Lambdoid
Coronal Suture
Sagittal Suture
Lambdoid Suture
Occipital Bone
Frontal Bone
Parietal Bone
Parietal Bone
Nasal choanae
Vomer Bone
Hard palate
Palatine bones
Palatine Process of the Maxilla
Pterygoid Plates
Medial pterygoid plate
Lateral pterygoid plate
Inferior orbital fissure
Foramina ovale
Foramina spinosum
Occipital condyles
Styloid process
Mastoid process
Zygomatic arch
Temporal process of the zygomatic bone
Zygomatic process of the temporal bone
Carotid Canal
Stylomastoid Foramen