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27 Cards in this Set
- Front
- Back
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skull of newborn: length of neurocranium circumference |
11cm 34cm |
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ratio between viscerocranium & neurocranium is: newborn - adult - |
1:8 1:2 |
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Development: type of ossification |
intramembranous ossification (many ossification centers, develops from CT) |
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bones develop from eminences, called and how many of each |
frontal - 2 parietal - 2 |
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at birth there are... |
large CT areas, fontanelles are between the bones |
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name of fontanelles: |
1. Anterior fontanelle 2. Posterior fontanelle 3. Sphenoid fontanelle 4. Mastoid fontanelle |
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1. Anterior fontanelle |
an unpaired opening, closed by CT closes after 3 years - frontal bone |
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2. Posterior fontanelle |
unpaired: smaller, closed by CT closes after 3 months - parietal bone |
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3. Sphenoid fontanelle |
paired, closed by CT closes after 6 months - frontal, parietal and sphenoid bones |
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4. Mastoid fontanelle |
closes after 18 months - cartilage, splenoid, temporal & occipital |
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newborn: viscerocranium |
small height, width and depth |
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newborn: prominent |
frontal and parietal tubera |
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where's the metopic suture |
on forehead |
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are mastoid and styloid process present in newborns? |
nope |
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is the alveolar process developed |
nope |
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different parts of occipital bone are |
separated |
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when does the frontal (metopic) suture close |
closes between the 1st and 2nd years of life |
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premaxilla is separated from |
maxilla |
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when are you able to distinguish a male or female skull? |
after puberty |
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nasofrontal junction - most significant difference |
in males it's like an incision |
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skull of an adult female is: |
lighter smaller cranial capacity is 10% less than male thinner wall infantile characteristics muscular ridges less strongly marked glabella, superciliary arches, ext occipital protuberance and mastoid processes are less prominant - corresponding air sinuses are small |
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female forehead |
is vertical the frontal and parietal tubers are prominent |
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female maxilla and mandible |
smaller teeth |
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how successful is the identification? |
90% |
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female skull |
10-20% smaller than male skull nose opening (nares) are more round tends to be smoother |
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male skull |
more robust nose opening (nares) are triangular glabella on frontal bone is more pronounced mastoid process is larger in males more noticeable backward slope to frontal bone mandible is more angular glabella is prominent |
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female pelvis |
is more wider |
