Lab 4 Part 2: Origins, Insertions, Actions

Question 1

what is the origin of the biceps brachii?

Answer 1

-scapula

Question 2

what is the insertion of the biceps brachii?

Answer 2

-radius

Question 3

what is the action of the biceps brachii?

Answer 3

-flexes the arm and forearm @ shoulder joint

Question 4

what is the origin of the brachialis?

Answer 4

-humerus

Question 5

what is the insertion of the brachialis?

Answer 5

-ulna

Question 6

what is the action of the brachialis?

Answer 6

-flexes forearm

Question 7

what is the origin of the triceps brachii?

Answer 7

-long head: infraglenoid tubercle (scapula)
-lateral head + medial head: humerus

Question 8

what is the insertion of the triceps brachii?

Answer 8

-ulna

Question 9

what is the action of the triceps brachii?

Answer 9

-extends arm + forearm

Question 10

what is the origin of the brachioradialis?

Answer 10

-humerus

Question 11

what is the insertion of the brachioradialis?

Answer 11

-radius

Question 12

what is the action of the brachioradialis?

Answer 12

-flexes forearm

Question 13

what is the origin of the extensor carpi radialis brevis?

Answer 13

-humerus

Question 14

what is the insertion of the extensor carpi radialis brevis?

Answer 14

-metacarpal 3

Question 15

what is the action of the extensor carpi radialis brevis?

Answer 15

-extends + abducts hand

Question 16

what is the origin of the extensor carpi radialis longus?

Answer 16

-humerus

Question 17

what is the insertion of the extensor carpi radialis longus?

Answer 17

-metacarpal 2

Question 18

what is the action of the extensor carpi radialis longus?

Answer 18

-extends + abducts hand

Question 19

what is the origin of the extensor carpi ulnaris?

Answer 19

-humerus
-ulna

Question 20

what is the insertion of the extensor carpi ulnaris?

Answer 20

metacarpal 5

Question 21

what is the action of the extensor carpi ulnaris?

Answer 21

-extends + adducts hand

Question 22

what is the origin of the extensor digitorum?

Answer 22

-humerus

Question 23

what is the insertion of the extensor digitorum?

Answer 23

-distal + middle phalanges

Question 24

what is the action of the extensor digitorum?

Answer 24

-extends distal and middle phalanges

Question 25

what is the origin of the flexor carpi radialis?

Answer 25

-humerus

Question 26

what is the insertion of the flexor carpi radialis?

Answer 26

-metacarpals 2+3

Question 27

what is the action of the flexor carpi radialis?

Answer 27

-flexes and abducts hand

Question 28

what is the origin of the flexor carpi ulnaris?

Answer 28

-humerus -ulna

Question 29

what is the insertion of the flexor carpi ulnaris?

Answer 29

-metacarpal 5

Question 30

what is the action of the flexor carpi ulnaris?

Answer 30

-flexes and adducts hand

Question 31

what is the origin of the palmaris longus?

Answer 31

-humerus

Question 32

what is the insertion of the palmaris longus?

Answer 32

-flexor retinaculum -palmar aponeurosis -(hand/palm)

Question 33

what is the action of the palmaris longus?

Answer 33

-weakly flexes hand

Question 34

what is the origin of the pronator teres?

Answer 34

-humerus -ulna

Question 35

what is the insertion of the pronator teres?

Answer 35

-radius

Question 36

what is the action of the pronator teres?

Answer 36

-pronates and weakly flexes the forearm