skull and neurocranium Flashcards
what is the parietal region
top of head
what is the temporal region
side of head above ear
what is the auricular region
ear
what is the buccal region
cheek
what is the orbital region
eye and eyebrows
what is the mental region
chin
what is the oral region
lips
what is the nasal region
nose
what is the infraorbital region
side of nose
what is the zygomatic region
cheek bones
what is the frontal region
forehead
what is the occipital region
back of head
what is the neurocranium
group of bones in the skull that encloses and protects the brain and associated sensory organs
what is the neurocranium divided into
cranial vault and cranial base
what is the viscerocranium
group of bones in the skull that surrounds and protects the proximal parts of the digestive and respiratory system
what are the 4 pneumatic bones
- maxillary bone
- frontal bone
- sphenoid bone
- ethmoid bone
what are pneumatic bones
bones in the skull which have air filled cavities called paranasal sinuses
what are the functions of pneumatic bones
- help to warm and humidify air
- make weight of skull lighter
- act as voice resonators
what are the functions of the skull
- case of protection for brain and meninges
- provides cavities for accommodation of organs of special senses
- provides openings for the passage of air and food
- accommodates teeth and jaw for mastication
what are the joints of the bones in the skull called
immovable joins called sutures
why are skull bones not fully fused at birth
- allows molding of fetal head during passage through birth canal
- permits growth of the brain
which is the free moving joint in the skull
- mandible connected to the cranium by synovial temporomandibular joints
what are fontanelles
wide sutures where 2 bones meet
what are the 6 fontanels newborns have
- anterior
- posterior
- two mastoid
- two sphenoid
when do anterior fontanelles close
18 months
when do posterior fontanelles close
1-2 months
what are the parts of the frontal bone
- squamous part - forehead
- nasal part - nose
- 2 paired orbital part - eyebrows