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Trunk Muscles

Trunk Muscles action

Extends neck and adducts scapula trapezius
extend and adducts humerus Latissimus dorsi
Abducts humerus Deltoid
Extends arm Triceps brachii
Adducts and flexes humerus Pectoralis major
Flexes vertebral column Rectus abdominis
Flexes and rotates vertebral column external oblique
Flexion of Elbow Brachioradialis
Internal rotation (medial rotation) of the humerus Teres major
Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column. Spinalis
protracts and stabilizes scapula, assists in upward rotation. Serratus anterior
Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column. Longissimus
Compresses abdominal contents Transverse abdominis
laterally rotates the arm, stabilizes humerus Teres minor
Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column. Iliocostalis
Lateral rotation of arm and stabilizes humerus Infraspinatus
Flexes elbow and supinates elbow Biceps brachii
Flexion of the elbow Brachialis
Compresses abdomen; unilateral contraction rotates vertebral column to same side. internal oblique
Created by: osucowboyup



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