Muscles of Upper Limb: Arm, Forearm, and Hand Flashcards Preview

Anatomy 2201 > Muscles of Upper Limb: Arm, Forearm, and Hand > Flashcards

Flashcards in Muscles of Upper Limb: Arm, Forearm, and Hand Deck (16)
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1

Anterior Compartment of Arm: 3 Muscles

biceps brachii, brachialis, coracobrachialis

all are flexors of either arm or forearm

2

Coracobrachialis

action: flexes and adducts arm

Origin: scapula
Insertion: humerus

3

Brachialis

action: flexes forearm

Origin: humerus
Insertion: ulna

4

Biceps Brachii

2 heads: short and long

Actions: flexes and supinates forearm

Origin: humerus
Insertion: radial tuberosity

5

What's the only muscle in the posterior compartment of the arm?

Triceps brachii

6

Triceps Brachii

3 heads: long, medial, lateral

actions:
--long head: extends forearm and arm
--medial and lateral heads: extend forearm

Origin:
--long head: scapula
--medial and lateral heads: humerus
Insertion (all 3 heads): ulna - olecranon

7

Brachioradialis

primarily located in anterior compartment of forearm

action: flexes forearm

Origin: humerus
Insertion: radius

8

What are the 2 forearm muscles?

Flexor muscles
Extensor muscles

9

Flexor Muscles (anterior compartment)

forearm muscles

action: flex wrist and digits

Origin: humerus medial epicondyle and forearm
Insertion: wrist and digits

10

Extensor Muscles (posterior compartment)

forearm muscles

action: extend wrist and fingers

Origin: humerus lateral epicondyle and forearm
Insertion: wrist and digits

11

Tennis Elbow (Lateral Epicondylitis)

The extensor muscles of the forearm attach to lateral epicondyle of humerus.

Overuse or trauma

12

What are the 3 intrinsic muscles of the hand?

Thenar group
Hypothenar group
Interossei

13

Thenar Group

intrinsic muscles of the hand

action: move thumb, opposes to digits

Origin: wrist
Insertion: pollex

14

Hypothenar Group

intrinsic muscles of the hand

action: move digit 5, opposes to thumb

Origin: wrist
Insertion: 5th digit

15

Interossei

intrinsic muscles of the hand

action: abducts and adducts digits

Origin: metacarpals 2-5
Insertion: phalanges 2-5

16

Golfer's Elbow (Medial Epicondylitis)

The flexor muscles of the the forearm attach to medial epicondyle of humerus.

Overuse or trauma