Anatomy: Skull Anterior View Flashcards
How many bones make up the neurocranium?
8 bones.
What are the general classes of skull bones?
The bones of the neurocranium and the facial bones.
What are the 8 bones of the neurocranium?
The frontal, occipital, ethmoid, and sphenoid bones, a pair of temporal bones, and a pair of parietal bones.
What is the general term for the skeleton of the head?
Cranium.
What are the associated bones of the skull?
The auditory ossicles (3 in each middle ear cavity) and the unpaired hyoid bone.
How many bones are there in total in the skull and associated bones?
29 bones (the 32 adult teeth are not counted separately as they are part of the mandible and maxilla).
What are the clinical classifications of midface fractures known as?
Le Fort fractures.
What bones are involved in a Le Fort I fracture?
The maxilla along the nasal floor is detached horizontally.
What bones are involved in a Le Fort II fracture?
Both maxillae, nasal bones, infraorbital rims, and orbital floors are included in the pyramidal fracture.
What bones are involved in a Le Fort III fracture?
The Le Fort II fracture, as well as both zygomatic bones, are included. This type of fracture may cause airway obstruction, nasolacrimal obstruction, and cerebrospinal fluid (CSF) leakage.
What type of joints are found between the bones of the neurocranium?
Immovable, fibrous joints known as sutures.
How many bones are there in the facial bones or viscerocranium?
14 bones.
What are the functions of the neurocranium bones?
The neurocranium bones enclose and protect the brain.
What are the functions of the facial bones or viscerocranium?
The facial bones or viscerocranium contribute to the structure of the face and play a role in functions such as eating, breathing, and sensory perception.
What are the auditory ossicles?
The auditory ossicles are three small bones (malleus, incus, and stapes) found in each middle ear cavity that are involved in hearing.
