Upper Extremity 2nd Part

Question 1

Origin of the Rhomboid Minor

Answer 1

Spinous process of vertebrae C7-T1

Question 2

Insertion of the Rhomboid Minor

Answer 2

Medial border scapula superior to scapular spine

Question 3

Function of the Rhomboid Minor

Answer 3

Adduction + Downward rota. + elevation of scapula at scapulothoracic joint + stabilises the scapula

Question 4

Origin of the Trapezius

Answer 4

Occipital bone + ligamentum nuchae + spinous processes of vertebrae C7-T12

Question 5

Insertion of the Trapezius

Answer 5

Posterior lateral third of clavicle + acromion and spine of scapula

Question 6

Function of the Trapezius

Answer 6

Superior fibers -> Elevation and upward rota. of scapula in the scapulothoracic joint + ext. and lateral flexion of the neck

Middle fibers -> Adduction of scapula in scapulothoracic joint

Inferior fibers -> Depression and upward rota. of scapula

Question 7

Origin of the Pectoralis major Clavicular + Sternocostal and abdominal part

Answer 7

Anterior surface of medial half of clavicle + Anterior surface of the sternul +
Anterior layer of rectus sheath

Question 8

Insertion of the Pectoralis major clavicular + Sternocostal + abdominal part

Answer 8

Lateral lip of the intertubecular groove of the humerus

Question 9

Function of the Pectoralis major clavicular + Sternocostal + Abdominal part

Answer 9

Adduction + Int. Rota. + flex. + Ext. of arm at shoulder joint + depression + downward rota. + abduction of scapula at scapulothoracic joint

Question 10

Origin of the Pectoralis minor

Answer 10

Ribs 3-5

Question 11

Insertion of the Pectoralis Minor

Answer 11

Coracoid process of the scapula

Question 12

Function of the Pectoralis Minor

Answer 12

Depression + Downward rota. + Abduction of scapula at scapulothoracic joint + elevation of ribs + stabilises scapula on thoracic wall

Question 13

Origin of the Deltoid (clavicular + acromial + spinal heads)

Answer 13

Lateral third of clavicle + acromion + spine of scapula

Question 14

Insertion of the Deltoid (clavicular + acromial + spinal heads)

Answer 14

Deltoid tuberosity of humerus

Question 15

Function of the Deltoid (clavicular +acromial + spinal heads)

Answer 15

Clavicular head -> Flex. + Int. Rota. + Horizontal adduction of arm at shoulder joint
Acromial head -> Abduction of arm at shoulder joint
Spinal head -> Ext. + Ext. Rota. + Horizontal abduction of the arm at the shoulder joint

Question 16

Origin of the Coracobrachialis

Answer 16

Coracoid process of scapula

Question 17

Insertion of the Coracobrachialis

Answer 17

Medial surface of humeral shaft

Question 18

Function of the Coracobrachialis

Answer 18

Adduction + Flex. + Horizontal adduction of arm at shoulder joint + stabilises shoulder/glenohumeral joint

Question 19

Origin of the Latissimus Dorsi

Answer 19

Spinous process of vertebrae T7-T12 + L1-L5 and sacrum + thoracolumbar fascia + inferior portion of scapula + posterior third of illiac crest + ribs 9-12

Question 20

Insertion of the Latissimus Dorsi

Answer 20

Intertubercular groove of humerus

Question 21

Function of the Latissimus Dorsi

Answer 21

Int. Rota. + adduction + Ext. of arm at shoulder joint + lateral flex. of spine

Question 22

Origin of the Brachialis

Answer 22

Anterior distal half of humerus

Question 23

Insertion of the Brachialis

Answer 23

Ulnar tuberosity + anterior surface of coronoid process of ulna

Question 24

Function of the Brachialis

Answer 24

Flex. of forearm at elbow joint

Question 25

Origin of the Biceps Brachii (SHORT + LONG HEAD)

Answer 25

Long Head -> Supraglenoid tubercle of scapula
Short Head -> Apex of coracoid process of scapula

Question 26

Insertion of the Biceps Brachii (SHORT + LONG HEAD)

Answer 26

Radial tuberosity + deep fascia of forearm

Question 27

Function of the Biceps Brachii (SHORT + LONG HEAD)

Answer 27

Flex. + supination of forearm at elbow joint + flex. of arm at the shoulder joint

Question 28

Origin of the Triceps Brachii (LONG + MEDIAL + LATERAL HEAD)

Answer 28

Long Head -> Infraglenoid tuberosity of scapula
Medial Head -> Posterior surface of the humerus
Lateral Head -> Posterior surface of humerus

Question 29

Insertion of the Triceps Brachii (LONG + MEDIAL + LATERAL HEAD)

Answer 29

Olecranon of ulna and fascia of forearm

Question 30

Function of the Triceps Brachii (LONG + MEDIAL + LATERAL HEAD)

Answer 30

Ext. of forearm at elbow joint + Ext. + adduction of the arm at shoulder joint(long head)