The flashcards below were created by user
kevindevriendt
on FreezingBlue Flashcards.
-
anthroscopic traits?
related to ancestry - very difficult to identify
-
asian classified under?
amerindian
-
areas of skull most diagnostic for acestry, which areas most important
1. nose
-
Nose - importance?
root ?
bridge?
most useful for determining ancestry
root= where nasal bone meets frontal bone
bridge- ridge of bone formed by nasal bone
spine- bone projecting from floor of nasal aperature
-
shape of lower border?
hole part as the bottom of the base of the nose
-
white nose
asian nose
black nose
W - nasal root high, wide distance between lower orbit and nasal root, pronounced spine
- A - nasal root low, narrow distance ""
- spine small
- B- nasal root low, narrow ""
- spine absent
-
Nose
W
A
B
- W - nasal root narrow, isosceles triangle
- A -nasal root intermiediate, opening intermiediate
- B - nasal root wide, opening equilateral triable
-
bottom of nose
W
B
A
W - distinct "sill" on ower border of nose
B - indistinct lower border with "guttering"
A - intermiediate between two
-
Face - what is the diagnostic feature?
- profile
- differences in facial projection due to diferent jaw sizes
-
facial projection entails?
W
A
B
tip of nasal bone to the forward projection of upper jaw
- W-more vertical
- A- intermiediate
- B- face projects forward
-
width of face (cheekbones)
W
A
B
- W- Face narrow
- A - Face wide
- B - Face narrow
-
eye orbits
W
A
B
- W- aglular eye orbits
- A- rectangular eye orbits
- B - round eye orbits
-
lower border of eye
W
A
B
- A - lower boder of eye projects forward
- B/W - lower border of eye relatively vertical
-
Shape of brain case - Vault
brow ridges and muscle attachments
W
A
B
W- more pronounced
-
Sutre patterns
W
A
B
Wormian bones
- W or B-basic not too complicated
- A- more wavy and complex (interdigitation)
Wormian bones more common in asian individuals
-
Post bregmatic depression (dip on top of skull)
W
A
B
- B - dip seen in black people
- W/A - flat - slightly convex
* unless individuals have their skulls have been artificially deformed. (first nations) not natural
-
Teeth and Jaws
White people
- W - teeth in white skulls have teeth too large for jaws
- --> causes dental crowding
-
dental arch
W
A
B
- W - parabolic
- A- rounded
- B- hyperbolic (u-shaped)
-
Insicor shape
W/B
A
- W/B - spatulate
- A - shovel shaped (90% in asian, and native american invdl.)
-
Post cranial traits
Femur
White and asian?
Black
-
W/A = femora with anterior curvature
B = straight femoral shafts
-
femorial torsion (on the head of the femur)
Black
very little femoral torsion in black people (head angles horizontally)
high degree of femoral torsion in white and asian individuals (head angled vertically)
-
Problems with metric methods for ancestry assesment?
- populations have changed since early 20th century
- methods of measurement unclear
- --> measuring qualitative measurements as well (not independant)
-
post cranial measurement
Femur (direct measurement)
Can only be seen on an x-ray
femur 0 angle of intercondylar shelf of distal femus as seen on x-ray
White >141 degrees <black
80% accuracy
-
metric measurements for ancestry determination
indexes?
3 main ones in skull?
consists of two measurement (one divided by another x 100)
- maxillofronal
- zygoorbital
- alpha
-
Mandible
WBA
- white - pointed chin
- black - blunt chin
- aisan - rounded chin and vertical acending ramus
-
hair
why useful?
WAB
preserves well in forensic context.
- W - straight/ slightly wave, dense on scalp
- B - naturally curelled grows more slowly,more parallel to scalp
- A - grows the fastest, coarse, and perpendicular to skulls.
-
Is skin colour useful?
why
no, not in forensic context
dark skin will bleach white if lying on damp ground
after death,light skin begins to darken.
|
|