Comparative Primate Anatomy

NOTES FOR FEBRUARY 27 LECTURE February 28, 2012 Having defined the major locomotor categories and the biologic salmagundi of the living primates, we move now to establishing Morphological and behavioural Correlates which exit help in interpreting the fossil record. We go a focal point approach by noting the difference among Quadrupeds, Brachiators and Bipeds. A. Basic movements of the forelimb 1. Quadrupeds move their forelimbs forwards (protract) and inverse (retract) in the sagittal plane. much the same way as dogs. 2. Brachiators raise their arm above their heads, in new(prenominal) voice communication they abduct and adduct their coat of arms in the florilegium plane. They remind and suspend their bodies with their arms. 3. Bipeds do not uphold or force their automobile trunk with their arms. They abduct/adduct their arms in the coronal plane as well as protracting and retracting in the sagittla plane. B. orientation of the Scapula 1. Quadrupeds have a plentiful pectoral cage, i.e. the distance in the midst of the vertebral tugboat and the sternum is greater than the breadth of the pectoral cage. 2. The scapula tends to be more to the sides of the thoracic cage. 3. The glenoid fossa is say downward. 4. Quadrupeds support their body weight not their forelimbs. 5. Brachiators: the scapula is on the back of the thoracic cage. 6. Glenoid fossa is direct laterally. 7.

Bipeds: the scapula is on the back of the thoracic cage. 8. Glenoid fossa is direc! t laterally. A. Size comparisons of supraspinatus and infraspinatus fossae 1. life-sized supraspinatus fossa is establish in primates that hold their arms above the shoulder joint: Ateles Alouatta Hylobates Pan and Gorilla 1. immense infraspinatus fossa is seen in animals that lift their body weight in addition to prop their arms above their heads: Pongo...If you want to countenance a mount essay, order it on our website: BestEssayCheap.com

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