Finals Study Guide

Question 1

ORIGIN
of the
Biceps Brachii

Answer 1

Long head: supraglenoid tubercle of the scapula

Short head: coracoid process of the scapula

Question 2

ORIGIN
of the
Brachialis

Answer 2

Distal anterior humerus

Question 3

INSERTION
of the
biceps brachii

Answer 3

Tuberosity of the radius and the bicipital aponeurosis

Question 4

Action of the biceps brachii

Answer 4

Flexion of the elbow, supination of the forearm, and flexion of the glenohumeral joint

Question 5

Origin of the pectoralis major

Answer 5

Clavicular fibers: anteromedial clavicle

Sternal fibers: sternum and it costal cartilage of ribs one through six

Question 6

Insertion of the pectoralis major

Answer 6

Lateral lip of the inter-tubercular groove

Question 7

Action of the pectoralis major

Answer 7

All fibers: horizontal adduction and medial rotation of the glenohumeral joint

clavicular fibers: flexion, adduction from less than 90° abducted position, abduction from greater than 90° abducted position of the glenohumeral joint

Sternal fibers: extension from a flexed position back to neutral, flexion from an extended position back to neutral, and adduction of the glenohumeral joint

Question 8

Origin of the infraspinatus

Answer 8

Infraspinous fossa of the scapula

Question 9

Insertion of the infraspinatus

Answer 9

Posterior greater tubercle of the humerus

Question 10

Action of the infraspinatus

Answer 10

Lateral rotation, horizontal abduction and and stabilization of the glenohumeral joint

Question 11

Origin of the pronator quadratus

Answer 11

Distal anterior Ulna

Question 12

Insertion of the pronator quadratus

Answer 12

Distal anterior radius

Question 13

Action of the pronator quadratus

Answer 13

Pronation of the forearm

Question 14

Origin of the brachialis

Answer 14

Distal anterior humerus

Question 15

Insertion of the brachialis

Answer 15

Coronoid process and tuberosity of the ulna

Question 16

Action of the brachialis

Answer 16

Flexion of the elbow

Question 17

Origin of the brachioradialis

Answer 17

Lateral supracondylar ridges of the humerus

Question 18

Insertion of the brachioradialis

Answer 18

Styloid process of the radius

Question 19

Action of the brachioradialis

Answer 19

From a pronated position, supination of the forearm to neutral, from a supinated position, pronation of the forearm to neutral, flexion of the elbow especially in the neutral position

Question 20

Origin of the pronator teres

Answer 20

Medial epicondyles of the humerus and coronoid process of the ulna

Question 21

Insertion of the pronator teres

Answer 21

Intermediate lateral radius

Question 22

Action of the pronator teres

Answer 22

Pronation of the forearm

Question 23

Origin of the triceps brachii

Answer 23

Long head: infraglenoid tubercle of the scapula

lateral head: proximal posterolateral humerus

medial head: distal posteromedial humerus

Question 24

Insertion of the triceps brachii

Answer 24

Olecranon process of the ulna

Question 25

Action of the triceps brachii

Answer 25

All heads: extension of the elbow

long head: extension and adduction of the glenohumeral joint

Question 26

Origin of the deltoid

Answer 26

Anterior fibers: anterolateral clavicle

middle fibers: lateral acromion process of the scapula

posterior fibers: inferior aspect of the scapular spine

Question 27

Insertion of the deltoid

Answer 27

Deltoid tuberosity of the humerus

Question 28

Action of the deltoid

Answer 28

All fibers: ab duction of the glenohumeral joint

anterior fibers: flexion, medial rotation, and horizontal adduction of the glenohumeral joint

posterior fibers: extension, lateral rotation, and horizontal abduction of the glenohumeral joint

Question 29

Origin of the temporalis

Answer 29

Temporal fossa

Question 30

Insertion of the temporalis

Answer 30

Coronoid process and ramus of the mandible

Question 31

Action of the temporalis

Answer 31

Elevate and retracts mandible at the temporomandibular joint