142anatomyreview05

142anatomyreview05 - Outward Rotation - the opposite of...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Outward Rotation - the opposite of inward rotation – the anterior aspect of the humerus moves laterally Muscles Deltoid Muscle – Origin - anterior, lateral third of clavicle; trop of the acromion; posterior border of the spine of the scapula Insertion – on the deltoid tuberosity on the middle, lateral surface of the humerus Actions – anterior – flexion and horizontal flexion - middle – abduction and horizontal flexion - posterior – horizontal extension, assists with extension Pectoralis Major Muscle Origin – inner two thirds of the anterior border of the clavicle; whole length of sternum and costal cartilages of the first six ribs Insertion – flat tendon about 3 inches wide to the outer lip of the bicipital groove of the humerus Action – clavicular portion – flexion, horizontal flexion - sternal portion – horizontal flexion, adduction, extension Latissimus Dorsi Muscle Origin – posterior crest of the ilium, back of sacrum, spines of the lower 6 thoracic and all lumbar...
View Full Document

This note was uploaded on 08/05/2011 for the course KIN 142 taught by Professor Asmundson during the Spring '09 term at Simon Fraser.

Ask a homework question - tutors are online