Muscle Attachments

Question 1

pectoralis minor

Answer 1

coracoid process to 3rd, 4th, 5th ribs

Question 2

serratus anterior (superior serration)

Answer 2

anteriorly; 1st and sometimes 2nd rib
posteriorly; superior angle of scapula
Fibres run parallel to ribs.

Question 3

serratus anterior (inferior serrations)

Answer 3

anteriorly; Ribs T2-T9 run to medial border of scapular, and inferior angle.

Question 4

Brachialis

Answer 4

Proximal; distal half of shaft of humerus. As high as distal attachment of deltoid muscle.
Distal; Coronoid process on proximal end of ulna.

Question 5

Extensor Digitorum

Answer 5

Proximal ; lateral epicondyle of humerus, intern muscular septa, antebrachial fascia.
Distal ; dorsum of hand

Question 6

Supinator

Answer 6

Proximal ; muscle spirals around the lateral side of radius to attach primarily to the dorsal surface of the ulna.
Distal ; volar surface of the radius just distal to the tendon of the biceps brachii.

Question 7

Biceps Brachii

Answer 7

Proximal ; long head tendon lies in bicipital groove and attaches to superior margin of glenoid cavity of the scapula. SHORT head ; coracoid process of scapula

Distal ; radial tuberosity.

Question 8

Coracobrachialis

Answer 8

Proximal ; apex of coracoid process

Distal ; medial surface of humerus. Just proximal to midpoint of humeral shaft.

Question 9

Teres Major

Answer 9

Medially ; dorsum of scapula near its inferior angle.

Laterally ; medial lip of the inter tubercular sulcus (grove) of the humerus.

Question 10

Teres Minor (rotator cuff)

Answer 10

Medially ; upper 2/3 of dorsal surface of scapula, near axillary border.
Laterally ; lowermost facet of greater tubercle of humerus.

Question 11

Subscapularis (rotator cuff)

Answer 11

Medially ; subscapular fossa

Laterally ; lesser tubercle on anterior aspect of humerus.

Question 12

Pectoralis major

Answer 12

Proximal ; 3 parts, Clavicular part, sternum part, costal part (costal cartilages of ribs 1-6)
Distal ; lateral lip of bicipital groove

Question 13

Rhomboids

Answer 13

Rhomboid minor (top one) - medially ; attaches above to nuchal ligament & spinous processes C7 & T1. Laterally to medial scapular border (level with root of scapular spine.
Rhomboid minor T2-T5 vertebra, and below to medial border of scapular.

Question 14

Levator Scapulae

Answer 14

Transverse processes of C1-C4 to vertebral border of scapular between superior angle and root of spine.

Question 15

external oblique

Answer 15

Origin : Sternum, external surfaces and inferior borders of lower eight ribs (5-12)
Insertion : Pubis, linea alba via aponeurosis and the iliac crest

Question 16

Rectus abdominis

Answer 16

proximal ; cartilages of 5, 6, 7th ribs, xiphoid process

distal ; crest of pubis and public tubercle, front of pubic symphysis

Question 17

Internal oblique

- thinner and smaller than external oblique

Answer 17

?

Question 18

Deltoideus

Answer 18

spinal part: scapular spine, acromial part: acromion, clavicular part: lateral third of the clavicle > all parts mid-shaft of the humerus, on the lateral surface (deltoid tuberosity).
In: Axillary nerve (C5, C6)

Question 19

Latissimus dorsi

Answer 19

iliac crest, thoracolumbar fascia, spinous processes of vertebrae Th6-12, last three or four rib pairs (IX-XII) and inferior scapular angle > lower part bicipital groove, inferior of teres major.
In.: thoracodorsal nerve (C6, C7, C8)

Question 20

Brachioradialis

Answer 20

most superficial muscle on radial side of the arm. It is an anterior (accessory) flexor of the elbow. Inn. Radial nerve (C05, C06).
Attaches above the lateral epicondyle on the humeral shaft. Inserts near styloid process of the radius.

Question 21

extensor carpi radialis longus

Answer 21

next to the brachioradialis, superficial. Originates on humeral shaft above lateral epicondyle. Inserts at base of 2nd metacarpal bone. Inn. Radial nerve (C06, C07).
Action; extension and abduction of the wrist.

Question 22

extensor carpi radialis brevis

Answer 22

?