Muscles of pelvic floor & mucles that move the scapula and arm & humerus

What muscle is this & what is its action?

Pubococcygeus muscle

Supports & maintains position of pelvic viscera; resists intraabdominal wall pressure

What muscle is this?

Serratus anterior muscle (19)

What muscle is this and what is its origin, insertion, and action?

Trapezius muscle (8)

Origin: occipital bone, spines of 7th cervical and all thoracic vertebrae

Insertion: clavicle, acromion and spine of scapula

Action: elevation, adduction, and depression of scapula

What muscle is this and what is its origin, insertion, and action?

Deltoid muscle (10)

Origin: acromion process and spine of scapula; clavicle

Insertion: clavicle, acromion and spine of scapula

Action: abduction, flexion, extension, medial (internal) and lateral (external) rotation of the arm at the shoulder joint

What muscle is this and what is its origin, insertion, and action?

Pectoralis major muscle

Origin: clavicle, sternum, costal cartilage of ribs 2-6

Insertion: greater tubercle and intertubercular sulcus of humerus

Action: adduction and medial (internal) rotation of the arm at the shoulder joint

What muscle is this and what is its origin, insertion, and action?

Pectoralis minor muscle

Origin: ribs 3-5

Insertion: coarcoid process of scapula

Acton: abduction and downward rotation of scapula

What muscle is this and what is its origin, insertion, and action?

Latissimus dorsi muscle

Origin: lumbar and lower thoracic vertebrae, crest of the sacrum and ilium

Insertion: intertubercular sulcus of humerus

Action: extension, adduction and medial (internal) rotation of the arm at the shoulder joint

What muscle is this?

Teres major muscle

What muscle is this and what is its origin, insertion, and action?

Subscapularis muscle (5)

Origin: subscapular fossa of scapula

Insertion: lesser tubercle of humerus

Action: medial (internal) rotation of the arm at the shoulder joint

What muscle is this and what is its origin, insertion, and action?

Supraspinatus muscle

Origin: supraspinous fossa of scapula

Insertion: lesser tubercle of humerus

Action: abduction of the arm at the shoulder joint

What muscle is this and what is its origin, insertion, and action?

Infraspinatus muscle

Origin: infraspinous fossa of scapula

Insertion: greater tubercle of humerus

Action: laterla (external) rotation of the arm at the shoulder joint

What muscle is this and what is its origin, insertion, and action?

Teres minor muscle

Origin: inferior lateral border of scapula

Insertion: greater tubercle of humerus

Action: lateral (external) rotation and extension of the arm at the shoulder joint