NOTES FOR FEBRUARY 27 LECTURE February 28, 2012 Having defined the major locomotor categories and the biological salmagundi of the living primates, we move now to establishing Morphological and behavioural Correlates which exit help in interpreting the fossil record. We will approach by noting the difference among Quadrupeds, Brachiators and Bipeds. A. Basic movements of the forelimb 1. Quadrupeds move their forelimbs forward (protract) and inverse (retract) in the sagittal plane. much the same itinerary as dogs. 2. Brachiators raise their arm above their heads, in other voice communication they abduct and adduct their harness in the florilegium plane. They remind and suspend their bodies with their arms. 3. Bipeds do not upkeep or force their consistence 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 Sca pula 1. Quadrupeds have a ambiguous pectoral cage, i.e. the distance in the midst of the vertebral towboat 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 direct laterally. A. Size compari! sons of supraspinatus and infraspinatus fossae 1. life-sized supraspinatus fossa is show in primates that hold their arms above the tug up: Ateles Alouatta Hylobates Pan and Gorilla 1. large(p) 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 get a mount essay, order it on our website:
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