Muscle Exam Flashcards
(52 cards)
Frontalis Action
Elevates eyebrows
Orbicularis Oculi Action
Closes eyes
Orbicularis Oris Action
Closes and protrudes lips
Masseter Action
Elevates Mandible
Temporalis Action
Elevates and retracts mandible
Sternocleidomastoid Action
Both sides: Flexes head
Single side: Flexes and rotates head to opposite side.
External Intercostals Action
Elevates rib cage (inspiration)
Internal Intercostals Action
Depresses rib cage (forced expiration)
Diaphragm Action
Flattens to increase thoracic volume for inspiration
Rectus abdominus Action
Flexes trunk, compresses abdomen
External oblique Action
Rotates and laterally flexes trunk; compresses abdomen
Internal oblique Action
Rotates and laterally flexes trunk; compresses abdomen
Transversus abdominus Action
Compresses abdomen
Rhomboid major Action
Retracts scapula
Rhomboid minor Action
Retracts scapula
Trapezius Action
Superior fibers: Elevates scapula
Middle fibers: retracts the scapula
Inferior fibers: depresses scapula
Serratus anterior Action
Protracts scapula
Pectoralis major Action
Flexes, adducts, and medially rotates arm
Pectoralis minor Action
Protracts and depresses the scapula
Latissimus dorsi Action
Extends, adducts, and medially rotates arm
Teres major Action
Extends, adducts, and medially rotates arm
Deltoid Action
Anterior fibers: flex arm
Middle fibers: abduct arm
Posterior fibers: extend arm
Supraspinatus Action
Abducts arm; stabilizes shoulder joint
Infraspinatus Action
Laterally rotates arm; stabilizes shoulder joint
