Upper Limb

Front 1

What are the two most superficial muscles of the shoulder

Back 1

trapezius and deltoid muscles

Front 2

State the origin, insertion, inner cation and function of the shoulder muscles

Back 2

Back (Definition)

Front 3

Muscles of the posterior scapula region

Back 3

Table 1.2 Muscles of the posterior scapular region (spinal segments in bold are the major segments innervating the muscle)

Muscle

Origin

Insertion

innervation

Function

Supraspinafus

Medial two-thirds of the

Most superior facet on the greater Suprascapular nerve

Rotator cuff muscle; participates

supraspinous fossa of the scapula tubercle of the humerus

(Cs. C6)

in abduction of the glenohumeral joint; stabilization of

and the deep fascia that covers

glenohumeral joint

the muscle

Infraspinatus

Medial fwo-thirds of the

Middle facet on posterior surface

Suprascapular nerve

Rotator cuff muscle, lateral

infraspinous fossa of the scapula of the greater tubercle of the (Cs. C6)

rotation of arm at the

and the deep fascia that covers humerus

glenohumeral joint,; stabiliyion

of glenohumeral joint

the muscle

Teres minor

Upper two-thirds of a flattened inferior facet on the posterior

Axillary nerve

Rofafor cuff muscle; lateral

strip of bone on the posterior surface of the greater tubercle of (Cs. C6)

rotation of arm at the

glenohumeral joint; stabilization

surface of the scapula immediately the humerus

of glenohumeral joint

adjacent to the lateral border of the scapula

Teres major

Elongate oval area on the

Medial lip of the infertubercular inferor subscapular

Medial rotation and extension of

posterior surface of the inferior sulcus on the anterior surface of nerve (CS. C6, C7) the arm at the glenohumeral joint;

stabilization of glenohumeral joint

angle of the scapula

the humerus

Long head of infraglenoid tubercle on scapula

Common tendon of insertion with Radial nerve

Extension of the forearm at the

medial and lateral heads on the

(C6. C7. CB)

elbow joint; accessory adductor

triceps brachi

olecranon process of ulna

and extensor of the arm at the glenohumeral joint