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