Arm and Cubital Fossa Muscles Flashcards Preview

S1 Anatomy > Arm and Cubital Fossa Muscles > Flashcards

Flashcards in Arm and Cubital Fossa Muscles Deck (33):
1

what are the muscles of the arm

biceps brachii
brachialis
coracobrachialis
triceps brachii
anconeus

2

biceps brachii
-origin

short head
-tip of coracoid process (with coracobrachialis)
long head
-supraglenoid tubercle of scapula

3

biceps brachii
-insertion

tuberosity of radius
fdascia of forearm via bicipital aponeurosis

4

biceps brachii
-actions

supinates pronated forearm
flexes supine forearm
flexes arm

5

biceps brachii
-innervation

musculocutaneous nerve (C5-7)

6

brachialis
-origin

distal 1/2 of anterior surface of humerus

7

brachialis
-insertion

coronoid process of ulna

8

brachialis
-actions

flexes forearm in all positions
main flexor of forearm

9

brachialis
-innervation

musculocutaneous nerve (C5, C6)

10

coracobrachialis
-origin

tip of coracoid process

11

coracobrachialis
-insertion

middle 1/3 of medial surface of humerus

12

coracobrachialis
-actions

arm flexion
arm adduction

13

coracobrachialis
-innervation

musculocutaneous nerve (C5, C6)

14

triceps brachii
-origin

long head
-infraglenoid process of scapula
lateral head
-posterior surrface of humerus, superior to radial groove
medial head
-posterior surface of humerus, inferior to radial groove

15

triceps brachii
-insertion

proximal end of olecranon of ulna
fascia of forearm

16

triceps brachii
-actions

extends forearm
-chief extensor of forearm
long head
-steadies head of abducted humerus
-assists in extension and adduction of arm

17

triceps brachii
-innervation

radial nerve (C6-C8)

18

anconeus
-origin

lateral epicondyle of humerus

19

anconeus
-insertion

lateral surface of olecranon process
superior part of posterior surface of ulna

20

anconeus
-actions

assists triceps in extending forearm
stabilizes elbow joint
abducts ulna during pronation

21

what are the muscles of the cubital region

supinator
brachioradialis
pronator teres

22

supinator
-origin

lateral epicondyle of humerus
radial collateral ligament
annular ligament
supinator fossa
crest of ulna

23

supinator
-insertion

lateral, posterior, and anterior surfaces of proximal 1/3 of radius

24

supinator
-actions

supinates pronated forearm

25

supinator
-innervation

deep branch of radial nerve (C7, C8)

26

brachioradialis
-origin

proximal 2/3 of lateral supraepicondylar ridge of humerus

27

brachioradialis
-insertion

lateral surface of distal end of radius proximal to styloid process

28

brachioradialis
-actions

flexes forearm

29

brachioradialis
-innervation

radial nerve (C5-C7)

30

pronator teres
-origin

medial epicondyle of humerus
coronoid process of ulna

31

pronator teres
-insertion

middle of lateral surface of radius

32

pronator teres
-actions

pronates forearm
assists in flexion of forearm

33

pronator teres
-innervation

median nerve (C6, C7)