Shoudler Girdle

Question 1

Give origin insertion and nerve for Trapezius

Answer 1

Origin: ext. occipital protuberance, medial portion of superior nuchal line of OP, ligament nuchea and spinous processes of C7- T12
Insertion: lateral one third of clavicle, acromion and spine of scapula.
N: Spinal portion of cranial nerve XI (accessory) and ventral ramus C2, 3, 4

Question 2

Give action for descending(upper) trap fibers.

Answer 2

Upper fibers: bilaterally extend the head and neck
Unilaterally laterally flex the head and neck to the same side
Rotate the head and neck to opposite side
Elevate the scapula
Upwardly rotate the scapula

Question 3

Give action for ascending (lower) trap fibers.

Answer 3

Scapular depression and upward rotation

Question 4

Give action for middle trap fibers

Answer 4

Scapular retraction (adduct) / stabilize scapula

Question 5

Name origin, insertion actions and nerve for deltoid

Answer 5

All: abduct the shoulder
Anterior: horizontally adduct, medially rotate and flex the shoulder
Posterior: horizontally abduct, laterally rotate and extend the shoulder
Origin: lateral 1/3 of clavicle, acromion and spine of scapula
Insertion: deltoid tuberosity
N: axillary C5,6

Question 6

Give action for posterior deltoid fibers.

Answer 6

Extend shoulder
Laterally rotates shoulder
Horizontally abducts the shoulder

Question 7

Give actions for middle deltoid fibers

Answer 7

Abducts shoulder

Question 8

Give actions for anterior deltoid fibers

Answer 8

Shoulder abduction
flexion
Medial rotation
Horizontal adduction

Question 9

Actions for supraspinatus and supraspinatus tendon

Answer 9

Shoulder abduction
Stabilizes head of humerus

Question 10

Origin insertion and nerve for supraspinatus

Answer 10

O: SPF of the scapula
I: greater tubercle of humerus
N Suprascapular C4, 5, 6

Question 11

Origin insertion and nerve for infraspinatus

Answer 11

O: infraspinatus fossa of scapula
I: greater tubercle of the humerus
N: Suprascapular C(4), 5, 6

Question 12

Origin, insertion and nerve for Teres minor

Answer 12

O: 2 upper thirds of lateral border of scapula
I: greater tubercle if humerus
N: Axillary C5, 6

Question 13

Origin insertion action and nerve for subscapularis

Answer 13

A: Medially rotate and stabilize head of humerous in glenoid cavity
O: sub-scapular fossa of the scapula
I: lesser tubercle if the humerus
N Upper and lower subscapular C5, 6, 7

Question 14

Action for subscap

Answer 14

Medially rotates the shoulder and stabilized head of the humerus

Question 15

Action for infraspinatus

Answer 15

Lateral rotation of shoulder
Adducts the shoulder
Stabilizes head of humerus in glenoid cavity

Question 16

Names actions of Teres minor

Answer 16

Laterally rotates the shoulder
Adducts the shoulder
Stabilizes head of humerus glenoid cavity

Question 17

Name origin, insertion action and nerve for latissimus dorsi

Answer 17

Action: shoulder extension, adduct shoulder and medially rotates

Origin: inferior angle of scapula, spinous processes of last six thoracic vert., last 3/4 ribs thoracolumbar fascia, and posterior iliac crest
I: inter-tubercular groove of the humerus
N Thoracodorsal C6, 7, 8

Question 18

Give actions for Pectoralis major

Answer 18

all fibers: adduct /Medially rotate the shoulder
Upper fibers: flex the shoulder/ horizontally adduct
Lower fibers extend the shoulder

Question 19

Actions for teres major and latissimus dorsi

Answer 19

(Shoulder)
Shoulder extension
Adduction
Medial rotation

Question 20

Name origin insertion and n for teres major

Answer 20

O: inferior angle and lower 1/3 of lateral border of the scapula
I: crest of lesser tubercle of the humerus
N Lower subscapular C5, 6, 7

Question 21

Give action, origin, insertion and nerve of Pectoralis minor

Answer 21

A: depresses scapula
Abducts the scapula
Downwardly rotates scapula
Assists to elevate the thorax during inhalation
O: third, forth and fifth ribs
I: medial surface of coracoid process of the scapula
N Medial pectoral, with fibers from a communicating branch of the lateral pectoral C(6), 7, 8, T1

Question 22

Origin insertion and nerve for Pectoralis major

Answer 22

O: Medial half of clavicle, sternum , cartilage of first-sixth ribs
I: crest of greater tubercle of humerus

N Upper fibers: Lateral pectoral C5, 6, 7 Lower fibers: Lateral and medial pectoral C6, 7, 8, T1

Question 23

Name origin, insertion, actions and n for subclavicus

Answer 23

A: elevate first rib during inhalation
Depress the clavicle and draw it anteriorly
Stabilize sternoclavicular joint
O: first rib/ cartilage
I: inferior surface of middle 1/3 of clavicle
N Subclavian C5, 6

Question 24

Action, origin, insertion and nerve for Teres major

Answer 24

Actions: extend the shoulder, adduct/ medially rotate the shoulder
O: inferior angle and lower 1/3 of lateral border of scapula
I: crest of lesser tubercle
N Lower subscapular C5, 6, 7