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Flashcards in Muscles Deck (75):
0

frontalis

raises the eyebrows

1

corrugator

eyebrows together

2

procerus

wrinkles nose

3

orbicularis oris

closes the mouth

4

zygomaticus

raises corners of mouth, superior lateral (real smile)

5

dilator nares

opens nostrils

6

compressor nares

closes nostrils

7

risorius

fake smile

8

levator labii superioris

raises upper lip

9

levator anguli oris

raises corner of mouth

10

depressor anguli oris

depress corner of mouth

11

depressor labii inferioris

depress lower lip

12

buccinator

compress cheeks

13

orbicularis oculi

closes the eye

14

levator palpebrae superioris

elevates eyelid

innervated by oculomotor CN III

15

muscles of facial expression innvervated by

facial nerve CN VII

16

sternocleidomastoid

O: sternal head - anterior surface of manubrium
clavicular head - medial 1/3 of clavicle

IN: lateral surface of mastoid process, lateral 1/2 of the superior nuchal line

INN: CN XI spinal accessory

A: flexes neck, extends head, ipsi side bend, contra rotation

17

splenius capitus

O: ligamentum nuchae
superior 6 thoracis vertebrae T1-T6

IN: mastoid process, superior nuchale line

INN: dorsal rami

A: ipsi head rotation & side bend
extend head & neck when acting together

18

scalenes

O: transverse processes C2-C6

IN: middle & anterior - rib 1
posterior - rib 2

INN: ventral rami

A: elevate ribs to aid in respiration
ipsi side bend head
contra rotate head

19

levator scapulae

O: posterior tubercle of 1st 4 transverse processes

IN: superior angle of scapula

INN: dorsal scapula nerve

A: in C-spine - ipsi side bend & rotation
in sagittal plane - tilt head back, head & neck extension

20

suprahyoids

mylohyoid
geniohyoid
stylohyoid
digastric - INN - 2 CN (non-specified)

A: elevate the hyoid bone

21

infrahyoids

sternohyoid
sternothyroid
thyrohyoid - INN CN XII
omohyoid

INN: ansa cervicalis

A: depress hyoid

22

iliopsoas

O: iliacus - iliac crest & fossa
psoas major - T12-L5

IN: lesser trochanter

INN: femoral nerve

A: hip flexion

23

sartorius

O: ASIS

IN: pes anserine

INN: femoral nerve

A: hip Flexion, ABduction, External Rotation (FABER)

24

tensor fascia lata (TFL)

O: ASIS, lateral aspect iliac crest

IN: iliotibial band (inserts on Gerdy's tubercle)

INN: superior gluteal nerve

A: hip flexion, ABduction, internal rotation

25

rectus femoris

O: AIIS

IN: tibial tuberosity via patella tendon

INN: femoral nerve

A: extend knee, flex hip

26

vastus lateralis

O: lateral lip linear aspera

IN: tibial tuberosity via patella tendon

INN: femoral nerve

A: extend knee

27

vastus medialis

O: medial lip linear aspera

IN: tibial tuberosity via patella tendon

INN: femoral nerve

A: extend knee

28

vastus intermedius

O: anterior lateral shaft of femur

IN: tibial tuberosity via patella tendon

INN: femoral nerve

A: extend knee

29

pectineus

O: body of pubic bone (pectin pubis)

IN: pectineal line on proximal femur

INN: femoral OR obturator nerve

A: hi ADDuction, hip flexion

30

ADDuctor longus

O: superior pubic rami

IN: middle aspect of linea aspera (inferior to pectineus)

INN: obturator nerve

A: hip ADDuction, hip flexion OR extension

31

ADDuctor brevis

O: inferior pubic ramus

IN: pectineal line, proximal aspect of femur

INN: obturator nerve

A: hip ADDuction

32

ADDuctor magnus

O: anterior - inferior pubic ramus
posterior - ischial tuberosity

IN: distal end medial aspect femur, ADDuctor tubercle of femur

INN: obturator AND sciatic nerves

A: hip ADDuction, hip extension

33

gracilis

O: inferior pubic ramus

IN: superior medial aspect of tibia

INN: obturator nerve

A: hip ADDuction
synergist for knee flexion

34

obturator externus

O: obturator foramen

IN: trochanteric fossa on femur

INN: obturator nerve

A: hip external roation

35

femoral triangle

base - inguinal ligament
lateral border - sartorius
medial border - ADDuctor longus
floor - lateral: iliopsoas; medial: pectineus
roof - fascia lata

contents:
femoral vein, artery, nerve

36

gluteus maximus

O: sacrum, coccyx, posterior aspect of ilium

IN: posterior aspect of ITB

INN: inferior gluteal nerve

A: hip extension, hip external rotation

37

gluteus medius

O: posterior aspect of ilium

IN: lateral aspect of greater trochanter

INN: superior gluteal nerve

A: hip ABduction, hip internal rotation

38

gluteus minimus

O: posterior ilium

IN: anterior aspect of greater trochanter

INN: superior gluteal nerve

A: hip ABduction, hip internal rotation

39

piriformis

O: anterior sacrum

IN: superior aspect of greater trochanter

INN: nerve to piriformis

A: hip external rotation

40

superior gemellus

O: ischial spine

IN: medial aspect of greater trochanter

INN: nerve to obturator internus

A: hip external rotation

41

obturator internus

O: obturator foramen

IN: medial aspect of greater trochanter

INN: nerve to obturator internus

A: hip external rotation

42

inferior gemellus

O: ischial tuberosity

IN: medial aspect of greater trochanter

INN: nerve to quadratus femoris

A: hip external rotation

43

quadratus femoris

O: ischial tuberosity

IN: medial aspect of greater trochanter

INN: nerve to quadratus femoris

A: hip external rotation

44

semimembranosis

O: ischial tuberosity

IN: posterior medial tibia, medial meniscus

INN: sciatic nerve

A: hip extension, knee flexion

45

semitendinosis

O: ischial tuberosity

IN: pes anserine

INN: sciatic nerve

A: hip extension, knee flexion

46

biceps femoris

O: LH - ischial tuberosity
SH - posterior femur

IN: fibular head

INN: sicatic nerve

A: LH - hip extension, knee flexion
SH - knee flexion

47

popliteal fossa

superior lateral - biceps femoris
superior medial - semitendinosis, semimembranosis
inferior lateral - lateral gastrocnemius
inferior medial - medial gastrocnemius

contents:
popliteal artery & vein
tibial nerve
common fibular nerve
posterior femoral cutaneous nerve

48

tibialis anterior

O: lateral condyle tibia, proximal 1/2 shaft of tibia, interosseus membrane

IN: 1st metatarsal, medial aspect medial cuneiform

INN: deep fibular nerve

A: dorsiflexion, inversion

49

extensor digitorum longus

O: proximal 3/4 lateral surface of fibula, interosseus membrane

IN: 4 tendons - middle & distal phalanges digits 2-5

INN: deep fibular nerve

A: extend toes

50

extensor hallucis longus

O: middle 1/2 anterior fibula, interosseus membrane

IN: distal phalanx digit 1

INN: deep fibular nerve

A: extend big toe

51

fibularis tertiarius

O: lateral 1/3 fibula

IN: tuberosity of 5th metatarsal

INN: deep fibular nerve

A: dorsiflexion, eversion

52

fibularis longus

O: proximal 2/3 lateral aspect fibula

IN: 1st metatarsal, lateral aspect medial cuneiform

INN: superficial fibula nerve

A: eversion
synergist for plantar flexion

53

fibularis brevis

O: distal 2/3 fibula

IN: tuberosity of 5th metatarsal

INN: superficial fibula nerve

A: eversion
synergist for plantar flexion

54

gastrocnemius

O: medial - medial femoral condyle
lateral - lateral femoral condyle

IN: Achilles' tendon

INN: tibial nerve

A: ankle - plantar flexion
knee - flexion

55

soleus

O: posterior aspect fibular including head, posterior medial border tibia

IN: Achilles' tendon

INN: tibial nerve

A: plantar flexion

56

plantaris

O: oblique popliteal ligament

IN: Achilles' tendon

INN: tibial nerve

A: plantar flexion

57

flexor hallucis longus

O: inferior posterior lateral surface fibula, interosseus membrane

IN: distal phalanx digit 1

INN: tibial nerve

A: flex big toe
synergist for plantar felxion

58

flexor digitorum longus

O: posterior surface tibia & fibula

IN: distal phalanges digits 2-5

INN: tibial nerve

A: flexes digits 2-5
assists with plantar flexion

59

tibialis posterior

O: posterior fibula, interosseus membrane, posterior aspect tibia inferior to soleal line

IN: metatarsal 1, navicular, cuboid, all cuneiforms, sometimes metatarsals 2, 3, 4

INN: tibial nerve

A: plantar flexion, inversion

60

popliteus

O: lateral condyle of femur, lateral meniscus

IN: posterior surface tibia superior to soleal line

INN: tibial nerve

A: unlocks knee, flexes knee

61

ABductor hallucis

O: medial tubercle calcaneus, flexor retinaculum, plantar aponeurosis

IN: medial aspect base of proximal phalanx digit 1

INN: medial plantar nerve

A: ABduct digit 1
assista with flexion digit 1

62

ABductor digiti minimi

O: medial/lateral tubercles of calcaneus, plantar aponeurosis

IN: lateral aspect base of proximal phalanx digit 5

INN: lateral plantar nerve

A: ABduct digit 5
helps flex digit 5

63

flexor digitorum brevis

O: medial tubercle calcaneus, flexor retinaculum, plantar aponeurosis

IN: both sides middle phalanges lateral 4 digits

INN: median plantar nerve

A: flexes digits 2-5

64

quadratus plantae

A: medial/lateral aspect plantar surface calcaneus

IN: tendons of FDL

INN: lateral plantar nerve

A: flexes digits 2-5 with FDL

65

lumbricals

O: tendons of FDL

IN: medial aspect extensor expansions digits 2-5

INN: L1 - medial plantar nerve
L2-L4 - lateral plantar nerve

A: flex MTP, extend IP

L1 - unipennate
L2-L4 - bipennate

66

flexor digiti minimi brevis

O: base of 5th metatarsal

IN: base proximal phalanx 5th digit

INN: lateral plantar nerve

A: flexes digit 5

67

flexor hallucis brevis

O: plantar surface cuboid, lateral cuneiform

IN: both sides bases proximal phalanx digit 1

INN: medial plantar nerve

A: flexes proximal phalanx digit 1

68

ADDuctor hallucis

O: oblique head, bases metatarsals 2-4, transverse head, ligaments of MTP

IN: tendons of both heads attach to lateral side base of proximal phalanx digit 1

INN: lateral plantar nerve

A: ADDucts digit 1

69

DABS

O: adjacent sides metatarsals 1-5

IN: D1 - medial side proximal phalanx digit 2
D2-D4 - lateral sides digits 2-4

INN: lateral plantar nerve

A: ABducts digits
flex MTP

70

PADS

O: medial sides metatarsals 3-5

IN: medial side bases proximal phalanges 3-5

INN: lateral plantar nerve

A: ADDucts digits
flex MTP

71

rectus abdominis

O: ribs 5, 6, 7

IN: pubic tubercle

INN: ventral rami T8/9-T10/11

A: trunk flexion

72

external abdominal oblique

O: lower 8 ribs

IN: ASIS, pubic tubercle via inguinal ligament (interdigitate with serratus anterior)

INN: ventral rami T8/9-T10/11

A: contra trunk rotation

73

internal oblique

O: inguinal ligament

IN: linea alba, lower 4-5 ribs

INN: ventral rami T8/9-T10/11

A: ipsi trunk rotation

74

transverse abdominis

O: deepest layers thoracolumbar fascia

INN: ventral rami T8/9-T10/11

A: compress & support abdominal viscera