ANAT30007 Study Guide - Final Guide: Radial Nerve, Extensor Pollicis Brevis Muscle, Lower Motor Neuron

• School: University of Melbourne
• Department: Anatomy and Neuroscience
• Course: ANAT30007
• Professor: All

Document Summary

Moment arm: measure of how much mechanical force can be generated at that point. Pulleys in fingers keeps tendon flat against the bones so the moment arms don"t change. Important so when finger is flexed, the pulleys keep the tendon strapped to the bones. Give much more powerful structure not because of the tendons, it"s because there is more muscle bulk. Extensor pollicis longus tendon goes around lister"s tubercle and onto the thumb. Abductor pollicis longus attaches to base of thumb. Lateral border: epl medial border: epb + apl. Teres major is pushed anteriorly by the long head of the triceps brachii. Long head of triceps brachii attaches onto scapula: splits major and minor. Axillary artery becomes brachial artery at inferior margin of teres major: axillary artery goes deep to pectoralis minor muscle, brachial plexus cords also protected, brachial artery until cubital fossa -> radial and ulnar artery. Cephalic: comes from dorsally on thumb side, runs in the deltopectoral groove.