Arm and Cubital Fossa Muscles Flashcards Preview

S1 Anatomy > Arm and Cubital Fossa Muscles > Flashcards

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

what are the muscles of the arm

A
biceps brachii
brachialis
coracobrachialis
triceps brachii
anconeus
2
Q

biceps brachii

-origin

A

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

3
Q

biceps brachii

-insertion

A

tuberosity of radius

fdascia of forearm via bicipital aponeurosis

4
Q

biceps brachii

-actions

A

supinates pronated forearm
flexes supine forearm
flexes arm

5
Q

biceps brachii

-innervation

A

musculocutaneous nerve (C5-7)

6
Q

brachialis

-origin

A

distal 1/2 of anterior surface of humerus

7
Q

brachialis

-insertion

A

coronoid process of ulna

8
Q

brachialis

-actions

A

flexes forearm in all positions

main flexor of forearm

9
Q

brachialis

-innervation

A

musculocutaneous nerve (C5, C6)

10
Q

coracobrachialis

-origin

A

tip of coracoid process

11
Q

coracobrachialis

-insertion

A

middle 1/3 of medial surface of humerus

12
Q

coracobrachialis

-actions

A

arm flexion

arm adduction

13
Q

coracobrachialis

-innervation

A

musculocutaneous nerve (C5, C6)

14
Q

triceps brachii

-origin

A

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
Q

triceps brachii

-insertion

A

proximal end of olecranon of ulna

fascia of forearm

16
Q

triceps brachii

-actions

A
extends forearm
-chief extensor of forearm
long head
-steadies head of abducted humerus
-assists in extension and adduction of arm
17
Q

triceps brachii

-innervation

A

radial nerve (C6-C8)

18
Q

anconeus

-origin

A

lateral epicondyle of humerus

19
Q

anconeus

-insertion

A

lateral surface of olecranon process

superior part of posterior surface of ulna

20
Q

anconeus

-actions

A

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

21
Q

what are the muscles of the cubital region

A

supinator
brachioradialis
pronator teres

22
Q

supinator

-origin

A
lateral epicondyle of humerus
radial collateral ligament
annular ligament
supinator fossa
crest of ulna
23
Q

supinator

-insertion

A

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

24
Q

supinator

-actions

A

supinates pronated forearm

25
Q

supinator

-innervation

A

deep branch of radial nerve (C7, C8)

26
Q

brachioradialis

-origin

A

proximal 2/3 of lateral supraepicondylar ridge of humerus

27
Q

brachioradialis

-insertion

A

lateral surface of distal end of radius proximal to styloid process

28
Q

brachioradialis

-actions

A

flexes forearm

29
Q

brachioradialis

-innervation

A

radial nerve (C5-C7)

30
Q

pronator teres

-origin

A

medial epicondyle of humerus

coronoid process of ulna

31
Q

pronator teres

-insertion

A

middle of lateral surface of radius

32
Q

pronator teres

-actions

A

pronates forearm

assists in flexion of forearm

33
Q

pronator teres

-innervation

A

median nerve (C6, C7)