ANT203Y1 Lecture Notes - Ulna, Biceps, Anatomical Terms Of Motion
Document Summary
Human: emphasis on lower limbs, upper limbs not as much, humerus: Mobility at that joint or weight bearing joint. Deltoid muscles: important for lifting arms, to 90 degrees. Distal end quite large, joins to wrist. Biceps not as massive because not hanging by arms, not arm dependent: ulna. Gorilla: 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: bones make selves stronger by curving, radius curvature. Distal end quite large joins to wrist large surface area for motion at wrist joint. Biceps well developed, noticeable bump on bone for attachment: ulna long ulna. Not a lot of bone (olecranon process) Does not articulate with carpals (wrist) so gives more mobility. Baboons: arboreal, restricted shoulder joint cannot reach arms above head.
