Appendicular Musculature (Ch 12) Flashcards Preview

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Flashcards in Appendicular Musculature (Ch 12) Deck (60):
1

What are the muscles that move the scapula?

1. Trapezius
2. Serrates Anterior

2

Trapezius

action:
-upper fibers elevate scapula
-middle fibers retract scapula
-lower fibers depress scapula
-all work together to rotate scapula

attachments: (O) C1-T12 vertebrae and (I) scapular spine/clavicle

3

Serrates Anterior

action: protracts and rotates scapula, holds scapula flat against body wall

attachments: (O) scapula and (I) ribs

4

What are the muscles that move the glenohumeral joint?

1. Pectoralis Major
2. Latissimus Dorsi
3. Teres Major

5

Pectoralis Major

actions: adducts, flexes, and medically rotates arm

attachments: (O) sternum, clavicle, ribs and (I) humerus

6

Latissimus Dorsi

actions: adducts, extends, and medially rotates arm

attachments: (O) lower back and (I) humerus

7

Teres Major

actions: adduct, extend, and medially rotate arm (same as latissimus dorsi)

attachment: (O) scapula and (I) humerus

8

What are the muscles of the shoulder?

1. Deltoid
2. Rotator Cuff
-Supraspinatus
-Infraspinatus
-Teres Minor
-Subscapularis

9

Deltoid

actions: abducts, flexes/extends, rotates arm

attachments: (O) scapular spine, clavicle and (I) humerus

10

Rotator Cuff

--> made up of four muscles (SITS)
-Supraspinatus
-Infraspinatus
-Teres Minor
-Subscapularis

11

Supraspinatus

*part of rotator cuff
actions: initiates abduction of arm (first 15 degrees)

attachments: (O) supraspinatus fossa of scapula and (I) humeral tuberosities

12

Infraspinatus

*part of rotator cuff
actions: laterally rotates arm

attachments: (O) infraspinatus fossa of scapula and (I) humeral tuberosities

13

Teres Minor

*part of rotator cuff
actions: laterally rotates arm

attachments: (I) infraspinatous fossa of scapula and (I) humeral tuberosities

14

Subscapularis

*part of rotator cuff
actions: medially rotates arm

attachments: (O) subscapular fossa of scapula and (I) humeral tuberosities

15

Shoulder Injuries

-common
-repetitive use/trauma
--> usually supraspinatus muscle

16

What are the three muscles of the anterior arm?

--> all are flexors of forearm/arm
1. Coracobrachialis
2. Brachialis
3. Biceps Brachii

17

Coracobrachialis

*anterior arm
actions: flexes arm

attachments: (O) scapula and (I) humerus

18

Brachialis

*anterior arm
actions: flexes forearm

attachments: (O) humerus and (I) ulna

19

Biceps Brachii

*anterior arm
actions: flexes and supinates forearm

attachments: (O) scapula and (I) radial tuberosity

20

What is the muscle of the posterior arm?

Triceps Brachii

21

Triceps Brachii

--> has long, medial, and lateral heads
actions:
long head- extends forearm/arm
medial/lateral heads- extends forearm

attachments:
long head- (O) scapula and (I) ulna (olecranon)
medal/lateral heads- (O) humerus and (I) ulna (olecranon)

22

Brachioradialis

--> primarily located in the anterior compartment of forearm
action: flexes forearm

attachments: (O) humerus and (I) radius

23

What are the forearm muscles?

1. Flexor Muscles (anterior compartment)
2. Extensor Muscles (posterior compartment)

24

Forearm Flexor Muscles

--> in anterior compartment
action: flex wrist/digits

attachments: (O) humerus medial epicondyle and forearm (I) wrist and digits

25

Forearm Extensor Muscles

-->in posterior compartment
action: extend wrist/digits

attachments: (O) humerus lateral epicondyle and forearm (I) wrist and digits

26

Tennis Elbow

a.k.a. Lateral Epicondyle
-extensor muscles of forearm attach to lateral epicondyle of humerus
-->overuse/trauma

27

What are the Intrinsic muscles of the hand?

1. Thenar group
2. Hypothenar group
3. Interossei

28

Thenar Group

*intrinsic muscles of the hand
actions: move thumb, opposes to digits

attachments: (O) wrist and (I) pollex

29

Hypothenar Group

*intrinsic muscles of the hand
actions: move digit 5, opposes to thumb

attachments: (O) wrist and (I) 5th digit

30

Interossei

*intrinsic muscles of the hand
actions: abducts/adducts digits

attachments: (O) metacarpals 2-5 and (I) phalanges 2-5

31

What is the muscle that moves the hip?

Iliopsoas

32

Iliopsoas

-->made up of iliacus and psoas major
-easy to see in abdomen, hard to locate in thigh
action: flexes thigh and trunk ("bowing")

attachments: (O) ilium and lumbar vertebrae (I) femur

33

What are the muscles of the gluteal region?

1. Gluteus Maximus
2. Gluteus Medius
3. Gluteus Minimus
4. Tensor Fascia Lata
5. Iliotibial Band (CT/fasia)

34

Gluteus Maximus

actions: abduction, extension and lateral rotation of thigh

attachments: (O) ilium, sacrum and (I) femur

35

Gluteus Medius/Minimus

actions: abducts thigh

attachments: (O) ilium and (I) femur

36

Tensor Fascia Lata

*muscle
actions: flexes, abducts, and medially rotates thigh; steadies IT band

attachments: (O) ilium and (I) iliotibial band

37

Iliotibial Band

*tight band of CT/fascia
actions: stabilizes thigh/trunk during walking/running

38

What are the muscles of the quadriceps femoris group?

1. Rectus Femoris
2. Vastus Lateralis
3. Vastus Intermedius
4. Vastus Medialus

39

What are the muscles of the anterior compartment of the thigh?

1. Quadriceps (Rectus Femoris, Vastus Lateralis, Vastus Intermedius, Vastus Medialus)
2. Sartorius

40

Rectus Femoris

*muscle of anterior thigh (quadricep)
action: flex thigh and extend leg

attachments: (O) ilium and (I) tibia via patella

41

Vastus Lateralis/Intermedius/Medialus

*muscle of anterior thigh (quadricep)
action: extend leg

attachments: (O) femur and (I) tibia via patella

42

Sartorius

*muscle of anterior thigh
-"tailors muscle": crosses legs
actions: flexes, abducts, and laterally rotates thigh and flexes leg

attachment: (O) pubis and (I) tibia

43

What are the muscles in the posterior compartment of the thigh?

Hamstrings
1. Biceps Femoris
2. Semitendinosus
3. Semimembranosus

44

Biceps Femoris

*muscle of posterior thigh (hamstring)
action: extension of thigh, flexion of leg

attachments: (O) ischium and femur (I) tibia

45

Semitendinosus and Semimembranosis

*muscle of posterior thigh (hamstring)
action: extension of thigh, flexion of leg

attachments: (O) ischium and (I) tibia

46

What are the muscles of the medial compartment of the thigh?

1. Gracilus
2. Adductor Magnus
3. Adductor Longus

47

Gracilis

*medial compartment of the thigh
actions: adducts thigh, medially rotates flexed leg

attachments: (O) pubis and (I) tibia

48

Adductor Magnus/Adductor Longus

*medial compartment of thigh
actions: adduction of hip/thigh

attachments: (O) pubis and (I) femur

49

What is the muscle of the anterior compartment of the leg?

Tibialis Anterior

50

Tibialis Anterior

*muscle of the anterior compartment of the leg
actions: dorsiflexion and inversion of the foot
-->prevents plantar flexion during walking

attachments: (O) tibia and (I) dorsum of foot

51

What are the muscles of the lateral compartment of the leg?

1. Fibularis Longus
2. Fibularis Brevis

52

Fibulas Longus/Fibularis Brevis

*muscles of the lateral compartment of the thigh
actions: evert and plantar flex food

attachments: (O) fibula and (I) sole of foot

53

What are the muscles of the posterior compartment of the leg?

1. Gastrocnemius
2. Soleus
3. Flexor Hallucis Longus
4. Flexor Digitorum Longus

54

Gastrocnemius

*muscle of the posterior compartment of the thigh
actions: flexes leg, plantar flexion of food

attachments: (O) femur and (I) calcaneus

55

Soleus

*muscle of the posterior compartment of the thigh
actions: flexes leg, plantar flexion of foot (same as gastrocnemius)

attachments: (O) tibia and fibula (I) calcaneus

56

Flexor Hallucis Longus

*muscle of the posterior compartment of the thigh
actions: plantar flexes hallux/foot

attachments: (O) tibia and fibula (I) hallux

57

Flexor Digitorum Longus

*muscle of the posterior compartment of the thigh
actions: plantar flexes digits 2-5 and foot

attachments: (I) tibia and fibula (I) digits 2-5

58

What are the joints of inversion/eversion?

1. Subtalar Joint
2. Transverse Tarsal Joint

59

Subtalar Joint

*joint of inversion/eversion
between talus and calcaneus

60

Transverse Tarsal Joint

*joint of inversion/eversion
between talus and navicular bones medically
between calcaneus and cuboid bones laterally