Muscles Of The Shoulder Complex Mmt Quiz 2

Front 1

SUPRASPINATOUS

Back 1

O: supraspinatous fossa of scapula

I: greater tubercle of humerus

A: abduct, stabilizes the (GH Joint) shoulder

N: suprascapular

Front 2

INFRASPINATUS

Back 2

O: Infraspinatous fossa of scapula

I: greater tubercle of humerus

A: external rotation, stabilizes (GH Joint) shoulder

N: Suprascapular

Front 3

TERES MINOR

Back 3

O: posterior surface of the lateral border of scapula (near the inferior angle)

I: greater tubercle of humerus

A: external rotation, stabilize the (GH Joint)shoulder

N: axillary

Front 4

SUBSCAPUALRIS

Back 4

O: subscapular fossa of scapula

I: lesser tubercle of humerus

A: internal rotation; stabilize (GH Joint) shoulder

N: upper and lower subscapular

Front 5

DELTOID

Back 5

O: anterior - lateral aspect of clavicle, middle - lateral aspect of acromion, posterior - spine of scapula

I: Deltoid tuberosity

A: Anterior - abduct, flex, internal rotation, horizontal adduct
Middle - abduct, flex, extension
Posterior - Extension, abduct, external rotate, horizontal abduct

N: Axillary

Front 6

TRAPEZIUS

Back 6

O: external occipital protuberence, superior nuchal line of the occiput, ligamentum nuchae, spinous processes of C7 - T12

I: lateral 1/3 of clavicle, acromion, spine of scapula

A:Upper fibers - Unilateral: cervical lateral flexion to the same side, cervical rotation to the opposite side, elevate and upwardly rotate, bilateral cervical extension
Middle Fibers - adduct
Lower - depresses and upwardly rotates

N: Spinal accesory (Cervical Nerve XI)

Front 7

LATISSIMUS DORSI

Back 7

O: Spinous process of T7 - T12, ribs 9 -12, thoracolumbar aponeruosis, posterior iliac crest

I: intertubercular groove of humerus

A: adduct, extend, internal rotation, scapular depression

N: thoracodorsal

Front 8

TERES MAJOR

(Lat dorsi's little helper)

Back 8

O: inferior angle of scapula

I: crest of lesser tubercle of humerus

A: extend, adduct, internal rotation

N: lower subscapular

Front 9

RHOMBOIDS (Minor & Major)

Back 9

O: spinous process of C7 - T5

I: medial border of scapula, across from the spine of scapula

A: Retraction, elevate, downwardly rotate

N: Dorsal scapula

Front 10

LEVATOR SCAPULA

Back 10

O: transverse process of C1 - C4

I: upper region of medial border, superior angle of scapula

A: Unilateral - elevate and downwardly rotate

N: dorsal scapular

Front 11

SERRATUS ANTERIOR

Back 11

O: surface of upper 8 - 9 ribs

I: medial border of scapula

A: protraction, upward rotation, holds scapula against thorax (pushing activities)

N: long thoracic

Front 12

PECTORALIS MAJOR

Back 12

O: medial half of clavicle, sternum, ribs 1 -6

I: crest of the greater tubercle of humerus

A: Upper fibers - adduct, internal rotate, flex, horizontally adduct
Lower fibers - adduct, internal rotate, extend

N: medial and lateral pectoral

Front 13

PECTORALIS MINOR

Back 13

O: ribs 3 -5

I: coracoid process of scapula

A: depresses, anterior tilt of scapula, downward rotation (assist with inspiration)

N: medial pectoral

Front 14

CORACOBRACHIALIS

Back 14

O: coracoid process of scapula

I: medial surfaceof mid-humerus

A: shoulder flexion

N: musculocutaneous

Front 15

Biceps Brachii

Back 15

O: Long Head - Supraglenoid Tubercle of the glenoid fossa

Short Head - Coracoid process of scapula

I: bicipital tuberosity of the radius

A: shoulder flexion

elbow flexion

supination of the forearm

N: musculocutaneous