Exam 2: Muscles of the Upper Limb Flashcards Preview

Anatomy A-215 > Exam 2: Muscles of the Upper Limb > Flashcards

Flashcards in Exam 2: Muscles of the Upper Limb Deck (41):
1

Trapezius

-elevates and retracts scapula

   

2

 Rhomboids (major, minor)

 -elevate and retract scapula

 

3

    Levator Scapulae

-elevates scapula

    

4

Pectoralis Minor

-protracts and depresses scapula

 

5

Serratus Anterior

-protracts and depresses scapula 

6

Pectoralis Major

-flexes and adducts arm/humerus at glenohumeral joint/arm

      -originates on axial skeleton 

7

 Latissimus Dorsi

- extends and adducts arm at glenohumeral joint/arm

-originates on axial skeleton

8

Deltoid

-abducts, flexes and extends arm

-originates on scapula

9

Coracobrachialis

-flexes and adducts arm

        
 

10

Teres Major

-extends and adducts arm

11

Rotator Cuff Muscles

-provide main support for glenohumeral joint

12

Subscapularis

 -medially rotates arm

-rotator cuff muscle

-wind up for pitch

    

13

    Supraspinatus 

-abducts arm

-rotator cuff muscle

-execute pitch

 

       

14

 Infraspinatus 

-laterally rotates arm

-rotator cuff muscle

-execute pitch

        

15

Teres Minor

- laterally rotates arm, extend arm/shoulder joint

-rotator cuff muscle

-finsih pitch, slow down pitching arm

16

Anterior Arm Muscles

-flexors of forearm/elbow joint 

-biceps brachii

-brachialis

-brachioradialis

17

Posterior Arm Muscles

-extensors of the forearm/elbow joint

-triceps brachii

-anconeus

18

Forearm Muscles

-Anterior forearm contains pronator and flexor muscles

19

Pronators 

-pronator teres (more superficial)

-pronator quadratus (deep)

20

Flexors

-flex wrist MP joints (knuckles) and/or IP joints

-most originate from medial epicondyle of humerus 

21

Flexor Retinaculum

-band of dense irregular connective tissue to hold flexor tendons close to bone. 

-space underneath is carpal tunnel 

22

Flexor Carpi Radialis

-flexes wrist and abducts hand

-superficial group          

23

  Palmaris Longus

-flexes wrist

-superficial group

           

24

 Flexor Carpi Ulnaris

-flexes wrist and adducts hand 

-superficial group

25

Flexor Digitorum Superficialis

-flexes wrist and flexes digits 2 through 5 at the MP and PIP joints (MP=metacarpal-phalangeal PIP=proximal interphalangeal)

-does not move DIP joint

-tendons attach to middle phalanges 

-intermediate group

26

Flexor Digitorum Profundus

- flexes wrist and digits 2-5 at the MP, PIP and DIP joints (DIP=distal interphalangeal)

-tendons attach to distal phalanges 

-deep group

27

Flexor Pollicis Longus

-flexes wrist MP joint, IP joint of thumb

-deep group

28

Supinator

-supinates forearm 

-biceps brachi supinates too 

29

Extensors

-extend wrist MP joints and/or IP joints, most originate from lateral epicondyle of humerus 

30

Extensor Retinaculum

-holds tendons down

-keeps them from bowing out

31

Extensor Carpi Radialis Longus

-extends wrist and abducts hand

-superficial group

            

 

32

Extensor Carpi Radialis Brevis

-extends wrist and abducts hand

-superficial group

           

33

 Extensor Digitorum

-extends wrist and extends digits 2-5 at MP, PIP, and DIP joints

-superficial group

34

  Extensor Carpi Ulnaris

-extends wrist and adducts hand

-superficial group

35

 Extensor Pollicis Longus

-:extends thumb

-deep group

          

36

  Extensor Pollicis Brevis

-extends thumb

-deep group

37

Abductor Pollicis Longus 

-abducts thumb

-deep group

38

Thenar muscles

-move the thumb

    

39

Hypothenar muscles

-move little finger

40

Midpalmar muscles

-move fingers 2-5

-all of these muscles flex the MP joints and extend the PIP/DIP joints

            1. Lumbricals: (4) thin, narrow band of muscles

 2. Palmar Interossei: (3) also adduct fingers

            3. Dorsal Interossei: (4) also abduct fingers

41

PAD-DAB

Palmer Interossei ADduct, Dorsal Interossei ABduct