adducts and flexes the arm
abducts scapula and rotates it downward, elevates 3rd - 5th ribs during forced inhalation
abducts and rotates scapula upward - boxers stance
extends and adducts arm at shoulder joint, lowers arm when when it is ekevated overhead
middle portion adducts scapula, inferior portion depresses scapula
Bilateral contraction that compresses abdomen and flexes vertebral column
Flexes vertebral column,especially lumbar region
bilateral contraction that compresses abdomen and flexes vertebral column
flattens to increase the length and volume of thoracic cavity during normal inspiration
laterally rotates and adducts arm at shoulder joint
assists deltoid muscle in abducting arm at shoulder joint
extends arm at shoulder joint
laterally rotates, extends and adducts arm at shoulder joint
medially rotates arm at shoulder
lateral portion abducts arm, anterior portion flexes arm, posterior portion extends arm
flexes forearm at at elbow and flexes arm at shoulder
flexes forearm at elbow
extends forearm at elbow, extends arm at shoulder
flexes forearm, pronates and supinates forearm
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