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23 Cards in this Set
- Front
- Back
what are the functions of cranial/ facial bones |
cranial: *hold/protect brain *house ear ossicles (cavities for orbits/ears) *muscle attachment for jaw, neck & facial muscles facial *forms basic facial structure *supports entrances to digestive & respiratory systems |
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which bone does these landmarks belong to? define the landmarks
1. external auditory meatus 2. mastoid process 3. styloid process |
temporal bone external: ear canal mastoid: inferior to external auditory meatus, attachment point for certain neck muscles styloid: sharp narrow stick, attachment of ligaments & muscles for tongue |
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which bone does these landmarks belong to? define the landmarks 1. occipital condyle 2. foramen magnum 3. external occipital protuberance |
occipital bone occipital: articulates with atlas (spinal cord) foramen: brain stem external: attachment for ligamentum nuchae, keeps head steady |
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define sutures of the skull and identify the 4 types |
def: connects bone & skull, immovable fibrous joints sagittal suture: connects parietal coronal suture: connects frontal to both parietals squamous suture: parietal, temporal lambdoid suture: partietal, occipital |
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what is the keystone bone? why is it the keystone bone |
sphenoid bone that articulates w/ all cranial bones |
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what is the sella turcica & optic foramen? what bone does this belong to? |
sellia: houses pituitary gland optic: a whole for nerves for eye passing through sphenoid bone sphenoid bone |
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to which bone those these bony landmarks belong to? 1. crista galli 2. cribriform plate 3. superior & middle nasal conchae |
ethmoid 1. crista galli: connective tissue points, membrane attachment points (hat) 2. cribriform plate: contains olfactory foramina 3. superior & middle nasal conchae: filtration, mucus membrane |
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what makes up the facial bones? |
2 lacrimal bones 2 nasal bones 2 inferior nasal conchae 1 mandible 2 maxilla bone 2 palatine bone 2 zygomatic bone 1 vomer |
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fxn of occipitofrontalis |
moves scalp (raises eyebrow in shock) |
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orbicularis oculi |
blinkin/closing eyes |
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zygomatic major/minor |
elevate mouth, raise mouth corners (smiling) |
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levator palpebrae |
opens eye (antagonist to orbicularis oculi
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orbicularis oris: |
closes mouth |
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buccinator |
presses cheeks into mouth |
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masseter |
chewing/closing mouth |
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temporalis |
base in temporal bone, elevates mandible |
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TMJ |
elevate, depress, protract retread of mandible |
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superior rectus |
elevation of eyeball back into orbital cavity |
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inferior rectus |
depression of eyeball |
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lateral rectus |
abduct |
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medial rectus |
adduction |
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superior oblique |
depress, abduct, intorsion |
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inferior oblique |
elevate, adduct, extorsion |