Muscles to Memorize (Upper)

Question 1

Brachialis and Brachioradialis

Answer 1

Both originate at distal humerus, brachialis inserts into radial styloid process and brachioradialis inserts into coronoid process of ulna. They flex elbow and brachioradialis supinates also.

Question 2

Biceps Brachii

Answer 2

Originates at coronoid process and glenoid cavity
Inserts radial tuberosity
Action flex elbow/shoulder, supinate

Question 3

Triceps Brachii

Answer 3

Origin scapula/humerus shaft
Insert olecranon process of ulna
Action extend elbow, adduct shoulder

Question 4

Biceps brachii synergists

Answer 4

At shoulder: pec major, coracobrachialis
At elbow: pronator teres, brachialis, brachioradialis

Question 5

Subscapularis

Answer 5

(Rotator Cuff)
Origin subscapular fossa
Insert humerus lesser tubercle
Action rotate arm laterally

Question 6

Biceps brachii antagonists

Answer 6

At shoulder: latissimus dorsi
At elbow: triceps brachii

Question 7

Latissimus Dorsi

Answer 7

Origin Thoracic/lumbar vert, iliac crest
Insert Humerus Intertubercular groove
Action Extend/Adduce arms

Question 8

Deltoid

Answer 8

Origin clavicle/acromion process/scapula spine
Insert Humerus deltoid tuberosity
Action Rotation/Abduction

Question 9

Supraspinatus/Infraspinatus

Answer 9

(Rotator Cuff)
Originate at the supraspinous/infraspinous fossa of scapula
Insert Humerus greater tubercle
Action Both rotate laterally, supra also abducts

Question 10

Teres Minor

Answer 10

(Rotator Cuff)
Origin Scapula inferior angle
Insert Intertubercular sulcus
Action Adduct, medial rotation

Question 11

Serratus Anterior Action

Answer 11

Pull scap upward, glenoid cavity upward

Question 12

Rhomboids

Answer 12

Origin: thoracic vert
Insertion: scap medial border
Action: Abduction/medial rotation of scapula

Question 13

Pectoralis Minor Action

Answer 13

Pull scap forward, glenoid cavity down

Question 14

Trapezius Action

Answer 14

Elevate scapula, extend neck

Question 15

Radioulnar Muscle Actions

Answer 15

Flexor Digitorum/Extensor Digitorum

Flexor Carpi Ulnaris/Extensor Carpi Ulnaris also Adduct/Abduct

Palmaris Longus flexes

Flexor Carpi Radialis/Extensor Carpi Radialis also Abducts