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Anatomy and Physiology > Muscles > Flashcards

Flashcards in Muscles Deck (70):
1

Orbicularis oris

Muscle of facial expression (kissing muscle)
-Closes and protrudes lips

2

Orbicular oculi

Muscle of facial expression (blink and sleep)
-closes eyelids

3

Zygomaticus (major and minor)

Muscle of facial expression (smile)
-Raises angle of mouth to smile

4

Buccinator

Muscle of facial expression
-Compress cheek; blowing and sucking

5

Platysma

Muscle of facial expression
Superficial plate down neck
-deperesses mandible, draws lips down, tightes/wrinkles neck: opens mouth

6

Frontalis

Muscle of facial expression (on eyebrow sheet like)
-Raises eyebrow, wrinkles forehead, draws scalp forward

7

Masseter*

Muscle of mastication (pitbull jaw)
o= Zygomatic Arch
I= Ramus of mandible
a= elevates mandible (chewing)

8

Temporalis

Muscle of mastication
a=elevates and retracts mandible

9

Hyoid bone

Muscle of mastication
-Elevates hyoid and larynx, depresses mandible

10

Sernocleidomastoid

Muscle that moves head (carrots in neck)
-If both sides contract, flexes neck
-if one side contracts, ratates head towards opposite side

11

Splenius capitus

Muscle that moves head
-Both sides=extends head (hyperestend too)
-one side= rotates heas ot the same side as the contracting muscle

12

Serratus Anterior

Muscle that moves shoulder (hug yourself)
-Abducts scapula

13

Pectoralis minor

Muscle that moves shoulder
-depresses and protracts scapula

14

Rhomboideus (major and minor)

Muscle that moves shoulder (touch elbows together)
-Adducts scapula

15

Trapezius*

Muscle that moves shoulder
o=occipital bone, ligamentum nache spines of c7-t12
i=clavical, acromian, and spine of scapula
a= elevates (upper portion) or depresses (lower portion) scapula, adducts scaplua, extends head

16

Pectoralis major*

Muscle that moves shoulder (anterior)
o=clavical, sternum, costal cartilage of ribs 2-6
i=greater tubercle of humerus
a=flexes, adducts, and medially rotates arm

17

Latissimus dorsi*

Muscle that moves shoulder (armpit muscle)
o= spinous process of t7 through all lumbar and sacrum, posterior iliac crest, lumbodarsal fascia
i=intertubercular grove of humerus
a= extends, adducts, and medially rotates arm

18

Deltoid*

Muscle that moves shoulder
o= clavical, acromion, spine of scapula
i= deltoid tuberosity of humerus
a= abducts arm

19

Supraspinatus*

Muscle that moves shoulder (rotator cuff)
o= supraspinous fossa
i= greater tubercle of humerus
a=abducts arm

20

infraspinatus*

Muscle that moves shoulder (rotator cuff)
o=infraspinous fossa
i= greater tubercle of humerus
a= rotates arm laterally

21

subscapularis*

Muscle that moves shoulder (rotator cuff)
o=subscapular fossa
i= lesser tubercle of humerus
a= rotates arm medially

22

teres major

Muscle that moves shoulder (rotator cuff)
-medial rotates and adducts arm

23

Teres minor

Muscle that moves shoulder (rotator cuff)
-rotates arm laterally

24

Biceps brachii*

Muscle that moves the forearm
o= above the glenoid fossa, coracoid process of the scapula
i=radial tuberosity
a=flexes forearm (elbow) and supinates forearm

25

Branchialis

Muscle that moves the forearm
-flexes forearm

26

Triceps brachii*

Muscle that moves the forearm
o= long head-below glenoid fossa, lateral head- lateral and posterior shaft of humerus procimally; medial head- posterior surface of humerus distally
i=olecranon process of the ulna
a=extends forearm (elbow)

27

supinator

Muscle that moves the forearm (palms up)
-Supinates forearm

28

pronator teres

Muscle that moves the forearm (palms down)
-pronates forearm

29

pronator quadratus

Muscle that moves the forearm
-pronates forearm

30

Flexor carpi radialis*

Muscle that moves the wrist and digits (fist, the tendon that pops out)
o=medial epicondyle of humerus
i=ventral surface of metacarpals II, III
a=flexes and abducts palm

31

flexor carpi ulnaris

Muscle that moves the wrist and digits
-flexes and adducts palm

32

Palmaris longus

Muscle that moves the wrist and digits
-flexes palm

33

flexor digitorum superficialis

Muscle that moves the wrist and digits
-flexes phalanges

34

Flexor digitorum profundus

Muscle that moves the wrist and digits
-flexes phalanges

35

extensor carpi radialis (longus)

Muscle that moves the wrist and digits
-extends and abducts palm

36

extensor carpi ulnaris

Muscle that moves the wrist and digits
-extends and adducts palm

37

Extensor digitorum*

Muscle that moves the wrist and digits
o=lateral epicondyle of humerus
i= dorsal surface of phalanges
a= extends phalanges and palms

38

Gluteus maximus*

Muscle that moves the thigh (posterior muscle)
o=iliac crest, sacrum, coccyx
i= gluteal tuberosity of femur
a= Extends thigh (hip joint) and laterally rotates thigh (pulls posterior)

39

Gluteus Medius

Muscle that moves the thigh (deep to the maximus in front of the hip joint)
-abducts and medially rotates thigh

40

Gluteus Minimus

Muscle that moves the thigh (deep to medius in front of hip joint)
-abducts and medially rotates thigh

41

Tensor fasciae of tibia

Muscle that moves the thigh (very lateral muscle, pulls thigh outward)
-tenses lateral fascia, flexes thigh (hip) and abducts thigh

42

Adductor longus*

Muscle that moves the thigh (runs down medial side)
o=pubis
i= linia aspera of femur
a= adducts thigh

43

Adductor magnus

Muscle that moves the thigh
-Adducts thigh

44

adductor Brevis

Muscle that moves the thigh
-adducts thigh

45

Quadraceps femoris*

Muscle that act on the leg (all muscles insert on tibial tuberosity, 4 different orgins)
-rectus femoris
-vastus lateralis
-vastus lateralis
-vastus medialis
-vastus intermedius

46

Rectus femoris*

Muscle that act on the leg (Quadraceps femoris)
o= anterior inferior iliac spine (only one that originates on the coxal bone
i= tibial tuberosity fia patellar ligament
a= extends knee, flexes thigh (hip) (only quad with action at hip joint, pulls hip forward)

47

Vastus Lateralis*

Muscle that act on the leg (Quadraceps femoris)
o= greater trochanter and lateral to aspera of femer
i= tibial tuberosity via patellar ligament
a= extends leg (straightens knee)

48

Vastus midalis*

Muscle that act on the leg (Quadraceps femoris)
o=medial to linea aspera of femur
i=tibial tuberosity via patellar ligament
a=extends leg

49

Vastus intermedius*

Muscle that act on the leg (Quadraceps femoris)
o=anterior surface of femur
i=tibial tuberosity via patellar ligament
a=extends leg

50

Hamstrings*

Muscle that act on the leg ( posterior thigh muscle 3 muscles make up)
-Biceps femoris
-semitendinosus
-semimembranosus

51

Biceps Femoris*

Muscle that act on Leg (part of hamstring)
o= ischial tuberosity and linea aspera (2 orgins)
i= lateral condyle of tibia and head of fibula (lateral shin bone)
a=flexes leg (knee), extends thigh (hip)

52

Semitendinosus*

Muscle that act on Leg (part of hamstring)
o= Ischial tuberosity
i= Medial surface of proximal tibia
a= Flexes leg and extends thigh

53

Semimembranosus*

Muscle that act on Leg (part of hamstring) (most medial "more m's in the name)
Most medial on thigh
o= ischial tuberosity
i= medial condyle of dibia
a= flexes leg and extends thigh

54

Gracilis

Muscle that act on Leg (long medial muscle running the inner thigh)
a= flexes leg and adducts thigh

55

Satorius

Muscle that act on Leg (crisscross)
a= flex thigh and leg, rotates thigh laterally

56

Tibialis Anterior

Muscle that moves the foot and toes (antagonist of gastrocnemius)
a=dorsiflex foot

57

Extensor digitorum longus* Longus=leg

Muscle that moves the foot and toes
o= Lateral condyle of tibia, anterior surface of fibula
i= dorsal surface of phalanges 2-5
a= extends toes, dorsiflex foot

58

Peroneus longus

Muscle that moves the foot and toes (aka fibularis)
a= planter flexes (stand on toes)

59

Gastrocnemius*

Muscle that moves the foot and toes (huge calf muscle)
o=Above lateral and medial condyles of femur
i= calcaneus by way of achilles tendon
a=planter flexes foot and flexes knee

60

Soleus

Muscle that moves the foot and toes (deep to gastrocnemius)
a= planter flexes foot

61

Flexor digitorum longus*

Muscle that moves the foot and toes
o=posterior surface of tibia
i= distal phalanges 2-5
a= flexes toes (curls toes), planter flexes foot

62

External abdominal oblique*

Muscle of the abdominal wall (most superficial)
o= lower 8 ribs
i= linia alba and iliac crest
a=compresses abdomen (sucking it in), flexes spine (doesnt attach but allows movement), depresses ribs

63

Internal abdominal oblique (@ angle)

Muscle of the abdominal wall (deep to external)
a=compresses abdomen, flexes spine, depresses ribs

64

Transversus Abdominis

Muscle of the abdominal wall
a= compresses abdomen

65

Rectus Abdominis*

Muscle of the abdominal wall (deep to the oblique, aka 6 pack, covered in apanorisis)
o= xiphoid process and costal cartilages of ribs 5-7
i= symphysis pubis
a= compresses abdomen, flexes vertebral column, depresses ribs

66

Diaphragm

Muscle used in breathing
a= increases size of thoracic cavity for breathing

67

External intercostals*

Muscle used in breathing
o=one rib
i=to the next
a= breathing (elevates ribs)

68

Internal intercostals*

Muscle used in breathing
o=one rib
i=to the next
a= breathing (elevates ribs)

69

Erector Spinae

Muscles that move the vertebral column
a= extends the vertebral column

70

occipitalis

Muscle of facial expression
a=draws scalp backward