EXCI 253 Lecture Notes - Lecture 11: Group C Nerve Fiber, Triceps Brachii Muscle, Dorsal Root Of Spinal Nerve

• School: Concordia University
• Department: Exercise Sci.
• Course: EXCI 253
• Professor: David Paris

Document Summary

You get deviation when 2 extensor carpi and flexor carpi radialis both contract. Extensor indicus : extends the 2nd finger. Elbow extensor, very weak, but it locks in , in the end of range of motion for extension. Abduction of the thumb is away from the frontal plane (sagittal plane) Extension is along the frontal plane for the thumb extensor pollicis brevis, longus. Anatomical snuffbox , when we fall, we might fracture the scaphoid. There might be swelling in snuffbox. radial artery could be felt in there. Ar(cid:373) (cid:272)urls it"s o(cid:374) the lateral side down to styloid process of radius. Instrinsic muscles (cid:373)ediall(cid:455) (cid:449)e ha(cid:448)e fle(cid:454)or polli(cid:272)is (cid:271)re(cid:448)is, it"ll flex thumb across the thumb. Adductor pollicus : transverse head forms the anterior webbing of the thumb. Dorsal interossei abduction and innervated by ulnar nerve. Where they originate from tendons of another muscle (flexor digitorum profondus) . lumbricales action is flexion at the metacarpal phalangeals and extension of distal ones.