muscles of pectoral gridle and arm Flashcards
what is the function of the trapezius?
elevated and retracts scapula
what is the function of the levator scapulae and its attachments?
elevates scapula and attaches to vertebrae
what is the function of the rhomboids and its attachments?
elevates and retracts scapula, attaches from medial border of scapula to vertebrae
what is the function of the pectoralis minor?
protracts and depresses scapula
what is the function of the serratus anterior?
same as pectoralis minor
what is the function of the pectoralis major?
flexes and adducts arm at the glenohumeral joint
why can the deltoid do so many movements?
not all muscles are contracting, anterior muscles flex and posterior muscles extend
what is the function of latissimus dorsi and its attachment?
extends and adducts arm, attaches to the humerus
what is the function of the deltoid?
abducts, flexes and extends arm
what is the function of the teres major?
extends and adducts arm
what is the function of the coracobrachialis?
flexes and adducts arm
what is the function of the rotator cuff?
provides support to the glenohumeral joint, stabalization
what is the function of the supraspinatus?
abducts arm
what is the function of the subscapularis?
medially rotates arm
what is the function of the infraspinatus?
laterally rotates arm
what is the function of the teres minor?
laterally rotates arm
what is the function of the anterior muscles of arm?
flexors
what is the function of the biceps brachii and its attachments?
supinates forearm and flexes arm, stabilizes shoulder and attaches to radial tuberosity, also short and long heads
what is the function of brachialis?
strong flexor of the forearm and its deep
what is the function of the brachioradialis and its attachments?
flexes the arm and attaches to styloid process of radius
what is the function of the posterior muscles of the arm?
extensors
what is the function of the triceps brachii and it attachments?
extension of the forearm, has 3 heads and attaches to the olecranon fossa