Muscle Actions- Lecture Unit 2 Exam

Question 1

Trapezius- A

Answer 1

Stabilizes the Scapula
Upper Portion: Elevates scapula
Middle & Lower Portion: Adducts the scapula

Question 2

Rhomboid Major- A

Answer 2

Elevate & Adducts Scapula

Helps Stabilize the Scapula

Question 3

Rhomboid Minor- A

Answer 3

Elevate & Adducts Scapula

Helps Stabilize Scapula

Question 4

Levator Scapula- A

Answer 4

Elevate Scapula
Adducts Scapula
Stabilize Scapula

Question 5

Latissimus Dorsi- A

Answer 5

Extends, Adduct & Medially Rotate the Humerus

Involved in forced Expiration

Question 6

Serratus Anterior- A

Answer 6

Abduction/Protraction of Scapula
Stabilizes Scapula
Involved w/ Forced Inspiration (when humerus is abducted)

Question 7

Deltoid- A

Answer 7

Anterior Portion: Flexes & Medially Rotates Arm
Middle Portion: Abducts Arm
Posterior Portion: Extends & Laterally Rotates Arm

Question 8

Supraspinatus- A

Answer 8

Initiates Abduction of Arm
Helps Laterally Rotate Humerus
Helps Stabilize Shoulder Joint

Question 9

Infraspinatus- A

Answer 9

Laterally rotates the Humerus

Stabilizes Shoulder Joint

Question 10

Subscapularis- A

Answer 10

Medially Rotates Humerus

Stabilizes Shoulder Joint

Question 11

Teres Major- A

Answer 11

Adducts Humerus
Stabilizes Shoulder Joint
Medially Rotates Humerus

Question 12

Teres Minor- A

Answer 12

Laterally Rotates Humerus

Stabilizes Shoulder Joint

Question 13

Biceps Brachii- A

Answer 13

Flexions of Forearm

Supinates the Radius

Question 14

Coracobrachialis- A

Answer 14

Flexion & Weak adduction of Arm (Shoulder Joint)

Stabilizes Shoulder Joint

Question 15

Brachialis- A

Answer 15

Flexes Forearm

Question 16

Triceps Brachii- A

Answer 16

Extension of Forearm

Question 17

Pronator Teres- A

Answer 17

Pronates Forearm at Superior RadioUlnar Joint

Assists flexion at Elbow Joint

Question 18

Flexor Carpi Radialis- A

Answer 18

Equal Prime Mover for Flexion of Hand at Wrist Joint

Assists in Abduction of Hand

Question 19

Palmaris Longus- A

Answer 19

Helps Flex Hand

Tightens Fascia of Palm/ Helps with Palmar Grip

Question 20

Flexor Carpi Ulnaris- A

Answer 20

Flexion of Hand at Wrist Joint

Adducts Hand

Question 21

Flexor Digitorum Superficialis- A

Answer 21

Flexes the PIP Joints of digits 2-5

Helps Flex Hand

Question 22

Flexor Digitorum Profundus- A

Answer 22

Flexes the DIP joints of digits 2-5

Helps Flex Hand

Question 23

Flexor Pollicis Longus- A

Answer 23

Flexes Digit 1 at IP Joint

Question 24

Pronator Quadratus- A

Answer 24

Pronation of Forearm at Inferior/Distal RadioUlnar Joint

Helps Stabilize the Distal Radio-ulnar Joint

Question 25

Brachioradialis- A

Answer 25

Helps flex forearm | Pronates and Supinates the forearm

Question 26

Extensor Carpi Radialis Longus- A

Answer 26

Extend the Hand | Abduct the Hand

Question 27

Extensor Carpi Radialis Brevis- A

Answer 27

Extend the Hand | Abduct the Hand

Question 28

Extensor Digitorum (Maximus)- A

Answer 28

Extends Digits 2-5 Extend Hand Abducts Digits 2, 4, 5

Question 29

Extensor Digiti Minimi- A

Answer 29

Extend digit 5

Question 30

Extensor Carpi Ulnaris- A

Answer 30

Extend Hand | Helps Adduct Hand

Question 31

Supinator- A

Answer 31

Supinates Forearm

Question 32

Abductor Pollicis Longus- A

Answer 32

Abducts Digit 1 at CM joint

Question 33

Extensor Pollicis Brevis- A

Answer 33

Extends Digit 1 at MP Joint

Question 34

Extensor Pollicis Longus- A

Answer 34

Extends Digit 1 at IP Joint

Question 35

Extensor Indicis- A

Answer 35

Extends Digit 2 at MP Joint

Question 36

Anconeus- A

Answer 36

Extends Forearm

Question 37

Abductor Pollicis Brevis- A

Answer 37

Abducts Digit 1 at MP Joint

Question 38

Opponens Pollicis- A

Answer 38

Medially Rotates 1st Metacarpal

Question 39

Flexor Pollicis Brevis- A

Answer 39

Flexes Digit 1 at MP Joint

Question 40

Adductor Pollicis- A

Answer 40

Adducts Digit 1

Question 41

Abductor Digiti Minimi- A

Answer 41

Abducts Digit 5

Question 42

Flexor Digiti Minimi- A

Answer 42

Flexes Digit 5 at MP Joint

Question 43

Opponens Digiti Minimi- A

Answer 43

Laterally Rotates 5th Metacarpal

Question 44

Lumbricales- A

Answer 44

Flexes MP Joint | Extends IP Joint

Question 45

Dorsal Interossei- A

Answer 45

Abduct Digits 2-4 Flex MP Joints Extends IP Joints

Question 46

Palmar Interossei- A

Answer 46

Adduct Digits 2, 4, & 5 Flex MP Joints Extends IP Joints