Axial Skeleton Flashcards
What are the bones of the skull?
28 bones that are extremely complex
How are the skull bones connected?
Sutures (Interlocking, immovable joints)
Most of the bones of the skull are flat bones and are formed by what ossification?
Intramembranous
What suture is between the frontal and parietal bones?
Coronal suture
What suture connects the parietal bones?
Saggital suture
What suture connects the parietal and temporal bones?
Squamous suture
What suture connects the occipital bone and parietal bones?
Lambdoid suture
The area between the bones of the infant skull bones are called what?
Fontanelles
What is premature fusion of the skull bones, which leads to unusual cranial vault shape?
Craniosynostosis
The vault, or the what, forms the superior, lateral, and posterior bones of the skull, which includes the forehead?
Calvarium
What are the eight bones of the cranium?
Frontal, two parietal, two temporal, occipital, ethmoid, and sphenoid
The inferior part of the cranium is called the what?
Base
What cranium bones make up most of the superior part of the skull and extend laterally and posteriorly?
Parietal bones
What cranium bone is the posterior part of the cranium and the cranial base?
Occipital bone
What two structures are in the occipital bone?
Foramen magnum and occipital condyles
What part of the temporal bone is above the zygomatic arch? What part includes the external acoustic meatus? What part is best seen externally and contains the middle and inner ear cavities?
Squamous part, tympanic part, and petrous part
The what of the temporal bone and the what of the mandible forms the TMJ joint?
Mandibular fossa, condyle
The temporal bone contains what two structures?
Mastoid process and styloid process
What are the three ear bones?
Malleus (hammer), incus (anvil), and stapes (stirrup)
Sound waves cause vibrations of what bones that are transmitted to the inner ear?
Middle ear bones
What is the only cranial bone to articulate with every other cranial bone?
Sphenoid
The sphenoid bone has what landmark, which holds the pituitary gland?
Sella turcica
Is the ethmoid or sphenoid bone more anterior?
Ethmoid
What bone forms some boundaries of the nasal cavity and separates the nasal cavity from the brain?
Ethmoid bone