Thoracic Limb Muscle Functions

Question 1

CUTANEUS TRUNCI M.

Answer 1

Twitches skin

Question 2

SUPERFICIAL PECTORAL M.

Answer 2

Adduct limb

Question 3

DEEP PECTORAL M.

Answer 3

Adduct limb

Question 3

BRACHIOCEPHALICUS M.

Answer 3

Extend shoulder joint; draw head and neck to the side

Question 4

OMOTRANSVERSARIUS M.

Answer 4

Advance the limb; flex neck laterally

Question 4

SERRATUS VENTRALIS M.

Answer 4

Support the trunk

Question 5

TRAPEZIUS M.

Answer 5

Draw scapula dorsally (elevate scapula/limb)

Question 5

RHOMBOIDEUS M.

Answer 5

Draw scapula dorsally
(elevate scapula/limb)

Question 6

LATISSIMUS DORSI M.

Answer 6

Flex shoulder joint; draw free limb caudally, as in digging action.

Question 7

STERNOCEPHALICUS M.

Answer 7

To draw the head and neck to the side

Question 8

STERNOHYOIDEUS M.

Answer 8

Pull tongue & larynx caudally

Question 9

OMOHYOIDEUS M.

Answer 9

‘Backstop muscle’ of jugular groove in cranial neck.

Question 9

CUTANEUS COLLI M.

Answer 9

Covers external jugular v. in caudal neck.

Question 10

SUPRASPINATUS M.

Answer 10

Extend shoulder joint/shoulder stabilization

Question 10

STERNOTHYROIDEUS M.

Answer 10

Pull tongue & larynx caudally

Question 10

SUBCLAVIUS M.

Answer 10

Extra pectoral muscle.

Question 11

Infraspinatus m. bursa

Answer 11

Protect tendon as passing over bone

Question 11

INFRASPINATUS M.

Answer 11

Extend shoulder joint/shoulder stabilization

Question 12

SUBSCAPULARIS M.

Answer 12

Extend shoulder joint/shoulder stabilization

Question 13

DELTOIDEUS M.

Answer 13

Flex shoulder joint

Question 14

TERES MINOR M.

Answer 14

Flex shoulder joint; rotate shoulder laterally

Question 15

TENSOR FASCIAE ANTEBRACHII M.

Answer 15

Extend elbow joint (weak)

Question 16

TRICEPS BRACHII M. (LONG HEAD)

Answer 16

Extend elbow joint (secondary: flex shoulder joint)

Question 16

TERES MAJOR M.

Answer 16

Flex shoulder joint

Question 17

TRICEPS BRACHII M. (LATERAL HEAD)

Answer 17

Extend elbow joint

Question 18

TRICEPS BRACHII M. (ACCESSORY HEAD)

Answer 18

Extend elbow joint

Question 19

TRICEPS BRACHII M. (MEDIAL HEAD)

Answer 19

Extend elbow joint

Question 19

BICEPS BRACHII M.

Answer 19

Flex elbow joint (secondary: extend shoulder joint)

Question 20

Intertubercular (bicipital) bursa

Answer 20

Protects tendon passing over point of shoulder

Question 21

BRACHIALIS M.

Answer 21

Flex elbow joint

Question 22

EXTENSOR CARPI RADIALIS M.

Answer 22

Extend carpus

Question 22

COMMON DIGITAL EXTENSOR M.

Answer 22

Extend digits and carpus

Question 23

LATERAL DIGITAL EXTENSOR M.

Answer 23

Extend digits and carpus

Question 24

ABDUCTOR DIGITI I LONGUS M.(ABDUCTOR POLLICIS LONGUS)

Answer 24

Abduct first digit (as exists) and extend carpus

Question 25

ULNARIS LATERALIS M.

Answer 25

Flex carpus; abduct manus at carpus

Question 25

Extensor retinaculum

Answer 25

Binds down extensor tendons

Question 26

FLEXOR CARPI RADIALIS M.

Answer 26

Flex carpus

Question 27

SUPERFICIAL DIGITAL FLEXOR M.

Answer 27

Flex proximal interphalangeal joints; flex carpus and metacarpophalangeal joints)

Question 28

DEEP DIGITAL FLEXOR M. (Humeral, Ulnar, Radial heads)

Answer 28

Flex digits and carpus

Question 29

Flexor retinaculum

Answer 29

Binds digital flexors within carpal canal

Question 30

FLEXOR CARPI ULNARIS M. (Humeral and Ulnar heads)

Answer 30

Flex carpus

Question 31

BRACHIORADIALIS M

Answer 31

Supination

Question 32

PRONATOR TERES M.

Answer 32

Pronation of the distal limb (and flex elbow)

Question 32

SUPINATOR M.

Answer 32

Supination of distal limb (and flex elbow)

Question 33

PRONATOR QUADRATUS M.

Answer 33

Pronation of the distal limb