Week 2: Introductory Myology

Question 1

What are the groups of muscles that are in the shoulder region?

Answer 1

axio/scapulo/claviculo-humeral muscles (attach to humerus), axioscapular muscles and rotator cuff muscles

Question 2

What are the attachments of pectoralis major?

Answer 2

sternal head= sternum to intertubercular groove of humerus

clavicular head= clavicle to humerus

Question 3

What are the actions of pectoralis major?

Answer 3

adduction, medial rotation and flexion

Question 4

What are the attachments of latissimus dorsi?

Answer 4

T7-S5, ribs 9-12, inferior angle scapula to intertubercular groove of humerus

Question 5

What are the actions of latissimus dorsi?

Answer 5

adduction, medial rotation and extension

Question 6

What are the three parts of the deltoid?

Answer 6

posterior, middle and anterior

Question 7

What are the attachments of the deltoid?

Answer 7

scapula spine, acromion, clavicle to deltoid tuberosity on humerus

Question 8

What are the action of the deltoid?

Answer 8

superior= extension, abduction, external rotation
middle= abduction
anterior= flexion, abduction

Question 9

What are the attachments of teres major?

Answer 9

scapula to intertubercular groove on humerus

Question 10

What are the attachments of the coracobrachialis?

Answer 10

coracoid process to mid shaft of humerus

Question 11

What are the actions of the coracobrachialis?

Answer 11

adduction and flexion

Question 12

What are the attachments of biceps brachii?

Answer 12

long head= supraglenoid tubercle to radial tuberosity

short head= coracoid process to radial tuberosity

Question 13

What are the actions of biceps brachii?

Answer 13

flexion of glenohumeral joint, elbow flexion and forearm supination

Question 14

What are the attachments of triceps brachii?

Answer 14

long head= scapula-infraglenoid tubercle to olecranon process of elbow
lateral head= superior of radial groove to olecranon
medial head= inferior to radial groove to olecranon

Question 15

What are the actions of triceps brachii?

Answer 15

extension of shoulder and elbow

Question 16

What are the attachments of the trapezius?

Answer 16

T1-T12 to clavicle, acromion and spine of scapula

Question 17

What are the actions of the trapezius?

Answer 17

upper= elevation and lateral rotation of scapula
middle= retraction of scapula
lower= retraction and lateral rotation of scapula

Question 18

What is the attachment of levator scapulae?

Answer 18

C1-C4 to medial border of scapula

Question 19

What are the actions of levator scapulae?

Answer 19

elevation of scapula

Question 20

What is the attachment of rhomboid minor?

Answer 20

C7-T1 to medial border of scapula

Question 21

What are the actions of rhomboid minor?

Answer 21

retract scapula

Question 22

What is the attachment of rhomboid major?

Answer 22

T2-T5 to medial border of scapula

Question 23

What are the actions of rhomboid major?

Answer 23

retract scapula

Question 24

What are the attachments of pectoralis minor?

Answer 24

ribs 3-5 to coracoid process

Question 25

What are the actions of pectoralis minor?

Answer 25

protraction, medial rotation and forward tilting of scapula

Question 26

What are the attachments of serratus anterior?

Answer 26

ribs 1-9 to medial border and inferior angle of scapula

Question 27

What are the actions of serratus anterior?

Answer 27

lateral rotation and protraction of scapula

Question 28

What are the attachments of the supraspinatus?

Answer 28

supraspinous fossa to greater tubercle

Question 29

What are the actions of supraspinatus?

Answer 29

external rotation and abduction

Question 30

What are the attachments of infraspinatus?

Answer 30

infraspinous fossa on posterior border of scapula to greater tubercle

Question 31

What are the actions of infraspinatus?

Answer 31

externa rotation of humerus

Question 32

What are the attachments of teres minor?

Answer 32

lateral border of scapula to greater tubercle

Question 33

What are the actions of teres minor?

Answer 33

external rotation of humerus

Question 34

What are the attachments of subscapularis?

Answer 34

anterior surface of scapula (subscapular fossa) to lesser tubercle

Question 35

What are the actions of the subscapularis?

Answer 35

internal rotation of humerus

Question 36

What are the different skeletal muscle attachments?

Answer 36

tendons (cord), aponeurosis (sheet), 'fleshy' (epimysium) and raphe (directly attach to another muscle)