the skull Flashcards
What is purpose of neurocranium
surrounds and protects the brain AND articulate with vertebral column
What is the purpose of the viscerocranium
make up facial skeleton, support and protect entrance to respiratory and digestive tracts
the frontal bone belongs to which cranium
neurocranium
the parietal bones belong to which cranium
neurocranium
the occipital bone belong to which cranium
neurocranium
the temporal bones belong to which cranium?
neurocranium
the ethmoid bone belongs to which cranium?
neurocranium
the sphenoid bone belongs to which cranium
neurocranium
which bones are in the neuroranium?
frontal, parietal, temporal, occipital, sphenoid, ethmoid
the maxillae belongs to which cranium
viscerocranium
the palatine bones belong to which cranium
viscerocranium
the nasal bones belong to which cranium
viscerocranium
the inferior nasal conchae belong to which cranium
viscerocranium
the zygomatic bones belong to which cranium
viscerocranium
the lacrimal bones belong to which cranium
viscerocranium
the vomer belongs to which cranium
viscerocranium
the mandible belongs to which cranium
viscerocranium
what bones are part of viscerocranium
maxillae, palatine, nasal, inf nasal, zygomatic, lacrimal, vomer, mandible (PMINZ MVL)
what does the frontal bone do?
make up forehead and a portion of the eye orbit
what does sphenoid bone do?
extend from one side of the brain to the other - forms part of eye orbit and base of skull
what do the temporal bones do?
make up temples/side of skull
what does ethmoid bone do?
contributes to nasal cavity and eye orbit
what do parietal bones do?
make up sides of the top of the head
what are the accessories of the temporal bone?
mastoid process, styloid process, zygomatic process
what is the external acoustic meatus for?
The external acoustic meatus is part of the temporal bone - it is the entrance to the ear canal
where is the mastoid process of the temporal bone?
Behind and below the ears
which features of the temporal bone are important for muscle attachment
mastoid process and styloid process
what does the zygomatic process of the temporal bone make up?
cheek bones
on what bone can you find the mandibular fossa?
on the temporal bone
what does the manibular fossa do?
articulates with mandible
what does occipital bone do
makes up base of skull, articulates with vertebral column
what is the foramen magnum
feature of occipital bone - allows for passage of spinal cord
what is the occipital condyle
feature of occipital bone - articulates with C1 (atlas)
what are the 3 features of the ethmoid bone?
crista galli (+cribiform plate), superior nasal concha, middle nasal concha
what is the crista galli of the ethmoid bone?
perpendicular projection of the ethmoid bone - acts as anchoring point for membranes surrounding the brain
what does the cribiform plate of the ethmoid allow?
it allows for branches of CN1 to pass through
what is pterygoid processses
feature of sphenoid bone - act as an attachment point of muscles of mastification
what is sella turcica?
feature of sphenoid bone - this is depression where pituitary gland sits
what are the 7 foramina of the sphenoid bone?
inferior orbital fissure, optic canal, superior orbital fissure, foramen spinosum, foramen rotundum, foramen ovale, foramen lacerum,
what does optic canal of sphenoid bone allow for?
Passage of CN2 - optic nerve
what does superior oribital fissure allow for?
passage of CN3,CN4,CN5(1),CN6
what does foramen rotundum of sphenoid bone allow for?
passage of CN5(2)
what does foramen ovale of spehnoid bone do?
passage of CN5(3)
what are the 3 foramina of the temporal bone?
carotid canal and extrernal/internal acoustic meatus and jugalar foramen (this one is both temporal and occipital)
what does the carotid canal of the temporal bone allow for?
passage of the internal carotid artery
what does the internal acoustic meatus of the temporal bone allow for?
passage of CN8
what are the 2 features of the occipital bone?
occipital condyles and the foramen magnum
what does jugular foramen allow for?
passage of CN 9,10,11
what does hypoglossal foramen allow for?
passage of CN 12
what does the coronal suture seperate?
frontal bone and parietal bone
what does lambdoid suture seperate?
parietal bone and occipital bone
what does squamous suture seperate?
temporal bone and parietal bone
what does saggital suture seperate?
parietal bone and parietal bone
what are sutures?
fibrous immovable joints btw skull bones
what does the anterior cranial fossa hold?
frontal lobe of the brain
what does the middle cranial fossa hold
temporal lobes of the brain
what does the posterior cranial fossa hold
cerebellum of the brain
what bones make up anterior cranial fossa?
frontal, ethmoid, sphenoid
what bones make up middle cranial fossa?
sphenoid and temporal bones
the nasal bones belong to which cranium?
viscerocranium
the maxillae belong to which cranium
viscerocranium
the zygomatic bones belong to which cranium
viscerocranium
the inferior nasal conchae belong to which cranium
viscerocranium
the lacrimal bones belong to which cranium
viscerocranium
the palatine bones belong to which cranium
viscerocranium
the vomer belongs to which cranium?
viscerocranium
the mandible belongs to which cranium
viscerocranium
what does the maxilla make up
the two bones of the maxilla make up the upper jaw
what do the zygomatic bones articulate with?
the zygomatic process of the temporal bones
what do the lacrimal bones make up?
medial eye orbit
what does the condyler process of the mandible articulate with
the skull
what is the temporomandibular joint?
the temperomandibular joint is the only movable joint of the skull - it is an articulation between the condyler process of the mandible and the mandibular fossa of the temporal bone
what does the maxillae make up?
the roof of the mouth (hard palate)
what are the ossicles?
small bones involved in hearing - houses in temporal bone. Include the malleus, the incus, and the stapes
what is the hyoid bone?
floating bone in neck important for tongue and swallowing muscle attachment
