Skull (Skeletal System) Flashcards
What are the 2 functional divisions of the skeletal system?
- Axial Skeleton
- Appendicular Skeleton
What are the 2 divisions of bones of the skull?
- Neurocranium (brain case bones)
- Viscerocranium (facial bones)
List the 8 Neurocranium bones. (Which are paired)
-Frontal Bone
-Parietal Bones (2)
-Occipital Bone
-Temporal Bone (2)
-Sphenoid Bone
Ethmoid Bone
Which cranial bones are paired?
Parietal Bones and Temporal Bones
List the 15 facial bones.
- Mandible
- Ethmoid Bone
- Vomer
- Maxilla (2)
- Inferior nasal concha (2)
- Zygomatic Bones (2)
- Palatine Bones (2)
- Nasal Bones (2)
- Lacrimal Bones (2)
Which 3 facial bones are NOT paired?
Mandible, Ethmoid Bone, Vomer
What are the 4 main sutures of the skull?
- Sagittal
- Coronal
- Lamboidal
- Squamous
What are the fibrous membranes present during infancy between the bones of the cranium?
Fontanelles
Palpation of the Fontanelles can indicate what 3 things?
1) growth progress
2) level of hydration
3) level of intracranial pressure
What are the 3 cranial fossa of the skull?
1) Anterior Cranial Fossa
2) Middle Cranial Fossa
3) Posterior Cranial Fossa
What is the function of the foramen of the skull?
Openings/holes allow for passage of nerves.
The temporal bones contain which 2 foramen?
Carotid Foramen and Jugular Foramen
Which cranial bone does the supraorbital foramen pierce?
Frontal Bone
The Infraorbital foramen passes through which bone?
Maxilla
What structure passes through the Foramen Magnum?
Spinal Cord
Which foramen is located on the Ethmoid bone?
Olfactory Foramen.
The Optic Foramen is located on which cranial bone?
Sphenoid Bone
What joint is formed by the mandibular condyle and the mandibular fossa?
Termporomandibuar Joint (TMJ)
What structure articulates with the occipital condyles?
They form the first articulation with the vertebrae column.
Which joint is formed between the occipital condyles and C1?
Atlanto-occipital joint.
Which joint is formed between the atlas and the axis? (C1 and C2)
Atlantoaxial joint
Which bone of the skull contains the Infraorbital foramen?
a) frontal
b) Ethmoid
c) sphenoid
d) maxilla
e) mandible
d) Maxilla (below eye orbit)
What are the 2 paired bones of the skull?
Parietal Bones and Temporal Bones
Which bone articulates with every other bone of the skull?
Sphenoid bone.
Which bones do the supraorbital and Infraorbital foramen pierce?
Supra-frontal bone
Infra- Maxilla
Which 2 foramen pass through the temporal bones?
Carotid and Jugular Foramina
The sphenoid bone houses which foramen?
Optic Foramen
The olfactory foramen is located on which bone
Ethmoid Bone
The Termporomandibuar joint (TMJ) is what type of synovial joint?
Hinge Joint
What boney landmark of the face is comprised of 2 bones?
Zygomatic arch= temporal and Zygomatic bone
