Slide 1

Set 3 Muscles Deep Muscles of the Torso Slide 2 Slide 3 Multifidus Slide 4 Multifidus rope of muscle Origin: Origin: Insertion: Insertion: Action: Action: spinous process of vertebrae above flexion, extension and rotation of spine transverse process of vertebrae * runs from axis to sacrum (4 th foramen) Slide 5 External Intercostales Slide 6 Origin: Origin: Insertion: Insertion: Action: Action: lower border of rib upper border of rib below active during respiration, elevate ribs (inhale) Slide 7 Serratus anterior Slide 8 Serratus anterior pushing muscle Origin: Origin: Insertion: Insertion: Action: Action: ventral surface of scapula (medial border pushing muscle; pulls scapula anteriorly and downward; bench press, serving in tennis, throwing baseball outer surface of ribs 1-8 (superior border) Slide 9 Subscapularis (rotator Cuff) Slide 10 Subscapularis (rotator cuff) Origin: Origin: Insertion: Insertion: Action: Action: lesser tubercle (humerus) and front of capsule of shoulder joint rotates the head of the humerus medially (internal rotation point thumb down); when the arm is raised, it draws the humerus forward and downward. fills subscapular fossa (anterior side of scapula) * It is a powerful defense to the front of the shoulder-joint, preventing displacement of the head of the humerus. Rehab: Pull band across abdomen Slide 11 Levator scapulae shrug muscle Slide 12 Origin: Origin: Insertion: Insertion: Action: Action: elevates scapula; I dont know shrugging muscle and/or bends neck and can rotate head superior border and medial margin of scapula transverse processes of C1-C4 vertebrae Slide 13 Levator scapulae shrug muscle Slide 14 Pectoralis minor Slide 15 Origin: Origin: Insertion: Insertion: Action: Action: sternal ends of ribs 3-5 coracoid process of scapula pulls scapula anteriorly and downward Slide 16 Rhomboideus major Slide 17 Origin: Origin: Insertion: Insertion: Action: Action: spinous process of T2-T5 Vertebrae medial border of scapula raises and adducts scapula Slide 18 Rhomboideus minor Slide 19 Origin: Origin: Insertion: Insertion: Action: Action: spinous process of C7 T1 vertebrae vertebral border of scapula at medial end of scapular spine retracts the scapula (shoulder) and rotates downward