Applied Kinesiology Chapter 5

Deltoid Muscle Origin: 1.[blank_start]Anterior[blank_end] [blank_start]Lateral third[blank_end] of the [blank_start]clavicle[blank_end] 2. [blank_start]Lateral aspect[blank_end] of the [blank_start]acromion[blank_end] 3. [blank_start]Inferior edge[blank_end] of the [blank_start]spine of the scapula[blank_end] Insertion: Deltoid tuberosity Action: Anterior fibers: [blank_start]abduction[blank_end], [blank_start]flexion[blank_end], [blank_start]horizontal adduction[blank_end], & [blank_start]internal rotation[blank_end] Middle fibers: abduction Posterior fibers: Posterior fibers: abduction, [blank_start]extension[blank_end], [blank_start]horizontal abduction[blank_end], & [blank_start]external rotation[blank_end]

Pectoralis Major Origin: 1.[blank_start]Medial half[blank_end] of the [blank_start]anterior surface[blank_end] of the [blank_start]clavicle[blank_end] 2. [blank_start]Anterior surface[blank_end] of the [blank_start]costal cartilages[blank_end] of the [blank_start]first six ribs[blank_end] 3. [blank_start]Adjoining portion[blank_end] of the [blank_start]sternum[blank_end] Insertion: 1. [blank_start]Flat tendon[blank_end] 2 or 3 inches wide to [blank_start]lateral lip[blank_end] of the [blank_start]intertubercular groove[blank_end] of the humerus Action: 1.Upper fibers (clavicular head): [blank_start]internal[blank_end] rotation, [blank_start]horizontal[blank_end] adduction, [blank_start]flexion[blank_end], [blank_start]abduction[blank_end] (once arm is [blank_start]abducted 90 degrees[blank_end], upper fibers assist in further abduction), & [blank_start]adduction[blank_end] (with arm [blank_start]below 90 degrees of abduction[blank_end]) 2. Lower fibers (sternal head): [blank_start]internal rotation[blank_end], [blank_start]horizontal adduction[blank_end], [blank_start]extension from flexed position[blank_end], & adduction

Latissimus Dorsi Origin: 1. [blank_start]Posterior crest[blank_end] of the [blank_start]ilium[blank_end] 2. [blank_start]Back of sacrum[blank_end] and spinous processes of [blank_start]lumbar[blank_end] and [blank_start]lower six thoracic[blank_end] vertebrae 3. Slips from the [blank_start]lower three ribs[blank_end] Insertion: [blank_start]Medial lip[blank_end] of the [blank_start]intertubercle groove[blank_end] of the humerus Actions: 1.[blank_start]Adduction[blank_end] 2.[blank_start]Extension[blank_end] 3. [blank_start]Internal rotation[blank_end] 4.[blank_start]Horizontal abduction[blank_end]

Teres Major Origin: The [blank_start]inferior third[blank_end] of the [blank_start]lateral border[blank_end] of the [blank_start]scapula[blank_end] Insertion: The [blank_start]medial lip[blank_end] of the [blank_start]intertubercle groove[blank_end] of the humerus Action: 1. [blank_start]Extension[blank_end], particularly from the [blank_start]flexed position[blank_end] to the [blank_start]posteriorly extended position[blank_end] 2.Internal rotation 3.[blank_start]Adduction[blank_end], particularly from the [blank_start]abducted position[blank_end] down to the side & toward midline of body

Coracobrachialis Muscle Origin: [blank_start]Coracoid process[blank_end] Insertion: [blank_start]Middle[blank_end] of the [blank_start]medial border[blank_end] of the humeral shaft Action: 1. [blank_start]Flexion[blank_end] 2. [blank_start]Adduction[blank_end] 3. [blank_start]Horizontal adduction[blank_end]

Subscapularis Muscle Origin: [blank_start]entire anterior[blank_end] surface of the subscapular fossa Insertion: [blank_start]Lesser[blank_end] tubercle of the humerus Action: 1.[blank_start]Internal rotation[blank_end] 2. [blank_start]Adduction[blank_end] 3.[blank_start]Extension[blank_end] 4.[blank_start]Stabilization[blank_end] of the humeral [blank_start]head in glenoid fossa[blank_end]

Supraspinatus Origin: [blank_start]Medial two thirds[blank_end] of the supraspinatus fossa Insertion: [blank_start]Superiorly[blank_end] on the greater tubercle of the humerus Action: 1.[blank_start]Abduction[blank_end] 2. [blank_start]Stabilization[blank_end] of the humeral [blank_start]head in glenoid fossa[blank_end]

Infraspinatus Muscle Origin: [blank_start]posterior surface[blank_end] of the scapula just [blank_start]below the spine[blank_end] Insertion: [blank_start]Greater tubercle[blank_end] on the [blank_start]posterior side[blank_end] Action: 1.[blank_start]External rotation[blank_end] 2. [blank_start]Horizontal abduction[blank_end] 3.[blank_start]Extension[blank_end] 4. [blank_start]Stabilization[blank_end] of humeral head in the [blank_start]glenoid fossa[blank_end]

Teres Minor Origin: [blank_start]Posterior scapula[blank_end], [blank_start]lateral border[blank_end] Insertion: [blank_start]Greater tubercle[blank_end] of humerus on the [blank_start]posterior[blank_end] Action: 1.[blank_start]External rotation[blank_end] 2.[blank_start]Horizontal abduction[blank_end] 3.[blank_start]Extension[blank_end] 4.[blank_start]Stabilization[blank_end] of humeral head in the [blank_start]glenoid fossa[blank_end]