HTHSCI 1H06 Lecture Notes - Lecture 1: Avascular Necrosis, Deep Palmar Arch, Palmar Interossei Muscles

• School: McMaster University
• Department: Health Sciences
• Course: HTHSCI 1H06
• Professor: Peter Helli

Document Summary

Bicepital aponeurosis presses artery against the muscle. 2) forearm flexion: done by bicipital aponeurosis, screwdriver. When biceps contract, bone unravels from pronation into supination. When you take blood gases, take sample of arterial blood (brachial artery: use bicep tendon to stabilize artery, don"t stick in median nerve (problem with thumb) 4 muscles around elbow: pronator teres: pronation pulls radius over ulna antagonist of supinator helped by pronator quadratis on end of ulna and radius, flexor carpi radialis. Deep forearm flexors of the fingers underneath superficial muscles: 2 layers form strong grip: flexor digitorum superficialis. 5 tendons: flexor digitorum profundus (deep, flexion of digits arise from radius, ulna and interosteus membrane between. Muscle contracts tendons of the fingers = flexion of digits. Forearm extensors come from lateral epichondial: extensor carpi ulnaris, extensor carpi radialis longus & brevis. Muscle at the back helps bicep with supination of the forearm (synergistic)