Class Notes (839,092)
Canada (511,185)
Anthropology (1,688)
ANT203Y1 (69)


4 Pages

Course Code
Maryam Nargolwalla

This preview shows page 1. Sign up to view the full 4 pages of the document.
ANT203 November 22, 2011 From last lecture: Locomotion Primate forelimbs  human o emphasis on lower limbs o upper limbs not as much o humerus:  proximal end has large joint surface  mobility at that joint or weight bearing joint  deltoid muscles: important for lifting arms, to 90 degrees  well developed attachment sites o radius  proximal end very circular = rotation  distal end quite large, joins to wrist  biceps not as massive because not hanging by arms, not arm dependent o ulna  not a lot of bone (olecranon process)  does not articulate with carpals (wrist) so gives more mobility  gorilla o humerus: longer, curvature, bone it robust (very strong and well made, can stand a lot of strain)  proximal end made for mobility and weight bearing (both)  distal end: joint capable of full extension and hyperextension  good for knuckle walking/hanging selves in tree o bones make selves stronger by curving o radius  curvature  equal emphasis  very circular = rotation  distal end quite large – joins to wrist  large surface area for motion at wrist joint  biceps well developed, noticeable bump on bone for attachment o ulna  not a lot of bone (olecranon process)  long ulna  very curved for strength  does not articulate with carpals (wrist) so gives more mobility  baboons o arboreal o restricted shoulder joint  cannot reach arms above head  not as much mobility o humerus  proximal end is restricted  distal end is arms cannot fully extend because has flexed forelimbs, running on trees want to keep arms close to body as possible for balance  elbows cannot fully extend o radius  proximal end not as circular, not as much movement  distal end very small  do not want a lot of motion at wrists when running through trees  want wrists to be stable  processive bone: is not only bone that articulates with wrist  articulate with both radius and ulna  gives stability through joint because stabilizes on both sides of wrist  want hand to move in same direction o ulna  has projection of bone  articulates with wrist to give more stability Primate hands  human o emphasis on precision, so not as large o phalanges: not too long  gracile: not a lot of bone, not knuckle walking, no weight resting on them o thumbs  huge emphasis  for precision  gorilla o designed for grasping o very large o bones are bigger, larger, longer, and more robust o need to withstand their weight o bones slightly curved 
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.