axial skeleton - the skull Flashcards
(35 cards)
what kind of bones are in the skull?
cranial & facial bones
what is the purpose of the cranial cavity?
holds & protects the brain
how many bones are there in the skull?
cranial: 8 bones
facial: 14 bones
function of cranial bones
serves as attachment for protective membranes of the brain & blood vessels
what is a main function of the skull?
forms, protects, & serves as attachment for structures relevant to our senses, breathing, & eating
what muscles attach to the skull?
face, head, & neck muscles
what bones are found in the neurocranium?
1 frontal bone; 2 parietal bones; 2 temporal bones; 1 occipital bone; 1 sphenoid bone; 1 ethmoid bone
what bones are found in the viscerocranium?
1 mandible; 2 maxillary bones; 2 zygomatic; 2 lacrimal bones; 2 nasal bones; 1 vomer bone; 2 palatines bones; 2 inferior concha
how many sutures are found in the skull?
- coronal suture
- squamous suture
- sagittal suture
- lambdoid suture
- occipitomastoid suture
where is the coronal suture located?
runs anteriorly in the coronal plane where the parietal & frontal bones meet
where is the squamous suture located?
on each lateral aspect of the skull where each parietal bone meets a temporal bone inferiorly
where is the sagittal suture located?
located in the midline of the cranium where the right & left parietal bones meet superiorly
where is the lambdoid suture located?
located where the parietal & occipital bones meet posteriorly
what kind of joint is the temporomandibular joint?
an irregular synovial joint
why is the temporomandibular joint considered to be an irregular synovial joint
it’s a mix between a hinge, planar, & condyloid joints;
fibrocartilage is present to improve stability
movements allowed by the temporomandibular joint
depression/elevation;
protraction/retraction;
lateral displacement
what is the only moveable joint found in the skull?
the temporomandibular joint
what are the major cavities found in the skull?
cranial, orbital, & oral cavities
what are the foramina found in the skull?
supraorbital & infraorbital foramina; foramen spinosum;
foramen magnum;
jugular foramen;
what are the fissures found in the skull?
superior & inferior orbital fissures
what are the canals found in the skull?
optic canal;
internal acoustic meatus;
hypoglossal canal;
carotid canal
what are the paranasal sinuses found in the skull?
frontal sinus;
ethomoidal sinus;
sphenoidal sinus;
maxillary sinus
what facial muscles are responsible for movement around the eyes?
frontalis;
corregator supercillii;
procerus;
orbicularis oculi
what facial muscles are responsible for movement around the nose?
the nasalis & the levator labii superioris alaeque nasi
