Lab 4 Part 1: Origins, Insertions, and Actions Flashcards
what is the origin of the deltoid?
-clavicle
-scapula
what is the insertion of the deltoid?
-humerus
what is the action of the deltoid?
-abducts arm @ shoulder joint
-medially + laterally rotates arm
what is the origin of the infraspinatus?
-scapula
what is the insertion of the infraspinatus?
-humerus
what is the action of the infraspinatus?
-laterally rotates arm
what is the origin of the latissimus dorsi?
-spines T7-L5
-ribs 9-12
-sacrum
what is the insertion of the latissimus dorsi?
-humerus
what is the action of the latissimus dorsi?
-extends and adducts the arm
-medially rotates arm @ shoulder joint
what is the origin of the pectoralis major?
-clavicle
-sternum
-ribs 2-6 (1-7 sometimes)
what is the insertion of the pectoralis major?
-humerus
what is the action of the pectoralis major?
-extends, adducts, and flexes the arm
-medially rotates arm @ shoulder joint
what is the origin of the serratus anterior?
-ribs 1-8 (9 sometimes)
what is the insertion of the serratus anterior?
-scapula
what is the action of the serratus anterior?
-abducts and rotates scapula upward (punching +pushing)
what is the origin of the subscapularis?
-scapula
what is the insertion of the subscapularis?
-humerus
what is the action of the subscapularis?
-medially rotates arm @ shoulder joint
what is the origin of the supraspinatus?
-scapula
what is the insertion of the supraspinatus?
-humerus
what is the action of the supraspinatus?
-abducts arm @ shoulder jointw
what is the origin of the teres major?
-scapula
what is the insertion of the teres major?
-humerus
what is the action of the teres major?
-extends and adducts arm
-medially rotates arm @ shoulder joint
what is the origin of the teres minor?
-scapula
what is the insertion of the teres minor?
-humerus
what is the action of the teres minor?
-extends arm
-laterally rotates arm @ shoulder joint
what is the origin of the trapezius?
-occipital bone
-spines C7-T12h
what is the insertion of the trapezius?
-clavicle
-scapula
what is the action of the trapezius?
-stabilizes scapula
-rotates the scapula upward
-adducts the scapula