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anatomy > LE Muscles > Flashcards

LE Muscles Flashcards

1
Q

Iliopsoas is a combination of what two muscles?

A

Ilacus, psoas major

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2
Q

Iliacus attachments

A

iliac fossa, iliac crest, sacral ala, sacroiliac ligaments
to
lesser trochanter of femer

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3
Q

Iliacus actions

A

Flexion and stabilization of hip joint

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4
Q

Peripheral and segmental innervation of iliacus

A

femoral nerve

L2, 3, 4

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5
Q

Name attachments, actions, peripheral and segmental innervation
Psoas major

A

anterior transverse processes, vertebral bodies, & discs of T12-L5
to
lesser trochanter of femur

flexion and stabilization of hip joint

ventral rami of L1-L4
L1,2,3,4

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6
Q

Name attachments, actions, peripheral and segmental innervation
Rectus Femoris

A

AIIS, groove superior to acetabulum
to
base of patella

flexion of hip, extension of knee

femoral nerve
L2,3,4

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7
Q

Name attachments, actions, peripheral and segmental innervation
Sartorius

A

ASIS to medial aspect of proximal tibia (pes anserine)

Flexion, abduction, lateral rotation of hip, flexion & assists of medial rotation of knee

Femoral nerve
L2-3

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8
Q

Name attachments, actions, peripheral and segmental innervation
Tensor Fasciae Latae

A

ASIS & external lip of iliac crest to IT tract

Abduction, flexion & medial rotation of hip, assists in maintaining knee extension

Superior gluteal nerve
L4,5,S1

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9
Q

Name attachments, actions, peripheral and segmental innervation
Vastus Intermedius

A

Anterior aspect of proximal 2/3 femoral shaft to lateral border of patella

Extension of knee

Femoral nerve
L2,3,4

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10
Q

Name attachments, actions, peripheral and segmental innervation
Vastus Lateralis

A

intertrochanteric line, greater trochanter, gluteal tuberosity, linea aspera to base & lateral patella

Knee extension

Femoral nerve
L2,3,4

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11
Q

Name attachments, actions, peripheral and segmental innervation
Vastus Medialis

A

intertrochanteric line, spiral line, linea aspera, supracondylar line to base and medial patella

Extend leg

Femoral nerve
L2,3,4

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12
Q

Name attachments, actions, peripheral and segmental innervation
Articularis genu

A

distal anterior shaft of femur to proximal portion of synovial membrane of knee joint

Pulls articular capsule proximally

Femoral nerve
L2,3,4

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13
Q

Name attachments, actions, peripheral and segmental innervation
Adductor brevis

A

inferior pubic ramus to distal 2/3 pectineal line and medial lip of linea aspera

Adduction and flexion of hip

Obturator nerve
L2,3,4

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14
Q

Name attachments, actions, peripheral and segmental innervation
Adductor longus

A

pubic crest to medial lip of linea aspera

Adducts, medially rotates, and flexes hip

obturator nerve
L2,3,4

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15
Q

Name attachments, actions, peripheral and segmental innervation
Adductor magnus

A

inferior pubic ramus, ischial ramus & tuberosity to gluteal tuberosity, linea aspera (adductor part), medial supracondylar ridge, adductor tubercle of femur (hamstring part)

Adduction, flexion (adductor part), extension (hamstring part) of hip

Adductor part: obturator nerve, L2,3,4
Hamstring part: tibial division of sciatic nerve, L4,5,S1

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16
Q

Name attachments, actions, peripheral and segmental innervation
Gracilis

A

body of pubis & inferior pubic ramus to pes anserine

Flexion and medial rotation of knee, adduction of hip

Obturator nerve
L2,3,4

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17
Q

Name attachments, actions, peripheral and segmental innervation
Pectineus

A

superior pubic ramus to femur between lesser trochanter & linea aspera

Adducts, flexes hip

Femoral nerve & obturator nerve
L2,3,4

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18
Q

Name attachments, actions, peripheral and segmental innervation
Obturator externus

A

from rami of the pubis and ischium, external surface obturator membrane to trochanteric fossa

lateral rotation of hip

obturator nerve
L3,4

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19
Q

Name attachments, actions, peripheral and segmental innervation
Superior gemellus

A

external surface spine of ischium via obturator internus tendon to greater trochanter

lateral rotation of hip

sacral plexus
L5, S1,2

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20
Q

Name attachments, actions, peripheral and segmental innervation
Inferior gemellus

A

proximal ischial tuberosity via obturator internus tendon to greater trochanter

lateral rotation of hip

sacral plexus
L4,5, S1

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21
Q

Name attachments, actions, peripheral and segmental innervation
Gluteus maximus

A

aponeurosis of the erector spinae, sacrum, sacrotuberous ligament & posterior gluteal line to greater trochanter, gluteal tuberosity of the femu & IT tract

extension and lateral rotation of hip

inferior gluteal nerve
L5, S1-2

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22
Q

Name attachments, actions, peripheral and segmental innervation
Gluteus medius

A

from external iliac surface to the oblique ridge on the lateral aspect of the greater trochanter to gluteal aponeurosis

abduction and medial rotation of hip; keeps the pelvic level when opposite leg is raised

superior gluteal nerve
L4, 5, S1

23
Q

Name attachments, actions, peripheral and segmental innervation
Gluteus minimus

A

external iliac surface and margin of the greater sciatic notch to the anterolateral aspect of the greater trochanter

abduction and medial rotation of hip; keeps pelvis level when opposite leg is raised

superior gluteal nerve
L4, 5, S1

24
Q

Name attachments, actions, peripheral and segmental innervation
Obturator internus

A

anterolateral wall of the pelvis & obturator membrane to the medial surface of the greater trochanter

lateral rotation of hip

nerve to he obturator internus from sacral plexus
L5, S1-2

25
Q

Name attachments, actions, peripheral and segmental innervation
Piriformis

A

anterolateral sacrum & posterior inferior iliac spine to the upper border of the greater trochanter

abduction and lateral rotation of hip

nerve to piriformis
S1-2

26
Q

Name attachments, actions, peripheral and segmental innervation
Quadratus femoris

A

from the ischial tuberosity to the quadrate tubercle of the femur

lateral rotation of hip

nerve to the quadratus femoris from sacral plexus
L4, 5, S1

27
Q

Name attachments, actions, peripheral and segmental innervation
Biceps femoris

A

ischial tuberosity & sacrotuberous ligament (long head); lateral lip of linea aspera & lateral supracondylar line (short head) to the lateral side of fibular head

flexion and lateral rotation of the knee (both heads)
extension of hip (long head only)

tibial division of sciatic (long head), fibular division of sciatic nerve (short head)

long head: L5, S1,2,3
short head: L5, S1,2

28
Q

Name attachments, actions, peripheral and segmental innervation
Semimembranosus

A

ischial tuberosity to posterior aspect of the medial tibial condyle

extension of hip, flexion and medial rotation of knee

tibial division of the sciatic nerve
L4, 5, S1, 2

29
Q

Name attachments, actions, peripheral and segmental innervation
Semitendinosus

A

ischial tuberosity to the proximal, medial tibia (pes anserine)

extension of hip, flexion and medial rotation of knee

tibial division of the sciatic nerve
L4, 5, S1, 2

30
Q

Extensor digitorum longus

A

lateral tibial condyle, proximal 3/4 of fibula and interosseous membrane to the dorsal digital expansions of toes 2-5

ankle dorsiflexion, extension of 2-5 (IP & MP)

deep fibular nerve
L4, 5, S1

31
Q

Extensor hallucis longus

A

middle 1/2 of fibular surface & interosseous membrane to the distal phalangeal base of 1st toe

ankle dorsiflexion, extends great toe (MP & IP)

deep fibular nerve
L4, 5, S1

32
Q

Fibularis tertius

A

distal fibula and interosseous membrane to base of 5th metatarsal

ankle dorsiflexion, eversion

deep fibular nerve
L4, 5, S1

33
Q

Tibialis anterior

A

lateral condyle and proximal 2/3 of the tibia’s lateral surface and interosseous membrane to the medial cuneiform and adjacent 1st metatarsal

ankle dorsiflexion, inversion

deep fibular nerve
L4, 5, S1

34
Q

Fibularlis longus

A

head & proximal 2/3 of fibula to the lateral aspect of 1st metatarsal and adjacent medial cuneiform

eversion, anke plantarflexion, depresses 1st metatarsal head

superficial fibular nerve
L4, 5, S1

35
Q

Fibularis brevis

A

distal 2/3 of tibula to lateral base of 5th metatarsal

eversion, plantarflexion

superficial fibular nerve
L4, 5, S1

36
Q

Flexor digitorum longus

A

posterior tibia distal to the soleal line to the plantar surface of the distal phalangeal bases

plantarflexion, flexion of digits 2-5 (MP & IP)

tibial nerve
L5, S1, 2

37
Q

Flexor hallucis longus

A

distal 2/3 of posterior fibular surface and interosseous membrane to the plantar aspect of the distal phalangeal base of the 1st toe

plantarflexion, great toe flexion (MP & IP)

tibial nerve
L5, S1, 2

38
Q

Gastrocnemius

A

posterior aspect of the femoral condyles and joint capsule to the posterior calcaneal surface

knee flexion, ankle plantarflexion

tibial nerve
S1, 2

39
Q

Plantaris

A

lateral supracondylar line to posterior calcaneal surface

knee flexion, ankle plantarflexion

tibial nerve
L4, 5, S1

40
Q

Popliteus

A

lateral femoral condyle and oblique popliteal ligament to the soleal line of the tibia

NWB: medial rotation of tibia and knee flexion
WB: insertion is fixed; lateral rotation of femur and knee flexion
Unlocks the knee from extension into early flexion

tibial nerve
L4, 5, S1

41
Q

Soleus

A

posterior aspect of the head & proximal 1/4 of fibula and tibial soleal line to the posterior calcaneal surface

plantarflexion

tibial nerve
L5, S1, 2

42
Q

Tibialis posterior

A

interosseous membrane, lateral tibial surface & medial fibular surface to the navicular, medial & intermediate cuneiforms and bases of metatarsals 2-4

inversion, plantarflexion

tibial nerve
L4, 5, S1

43
Q

Abductor digiti minimi

A

calcaneal tuberosity to lateral side of proximal phalangeal base of 5th digit

abduction and flexion of 5th digit

lateral plantar nerve
S1-2

44
Q

Abductor hallucis

A

medial calcaneal tuberosity to medial side of proximal phalangeal base of great toe

flexion and abduction of great toe

medial plantar nerve
L4, 5, S1

45
Q

Adductor hallucis

A

from 2-4th metatarsal bases (oblique head) and distal ends of 3-5 metatarsal (transverse head) to lateral base of the proximal phalanx of great toe

adduction of great toe

lateral plantar nerve
S1-2

46
Q

Extensor digitorum brevis

A

anterolateral calcaneus to dorsal aspect of the base of the proximal phalanx

extension of digits 2-5 (MP & IP)

deep fibular nerve
L4, 5, S1

47
Q

Extensor hallucis brevis

A

extensor digitorum brevis to dorsal aspect of the base of the proximal phalanx of the hallux

extension of great toe at MTP joint

deep fibular nerve
L4, 5, S1

48
Q

Quadratus plantae

A

medial surface of calcaneus and lateral process of calcaneal tuberosity to long flexor tendons

assists with flexor digitorum longus

lateral plantar nerve
S1-2

49
Q

Flexor digitorum brevis

A

medial process of calcaneal tuberosity to sides of intermediate phalanges of digits 2-5

flexion of toes (proximal IP)

medial plantar nerve
L4, 5, S1

50
Q

Flexor digiti minimi brevis

A

5th metatarsal base to proximal phalangeal base

flexion of 5th digit (MP)

lateral plantar nerve
S1-2

51
Q

Flexor hallucis brevis

A

cuboid & tendon of tibialis posterior to base of the proximal phalanx of great toe

flexion of great toe (MP)

medial plantar nerve
L4, 5, S1

52
Q

Dorsal interossei

A

metatarsal shafts to proximal phalangeal bases & dorsal digital expansion of digits 2-4

abduction (MP) and flexion (MP) of digits 2-4

lateral plantar nerve
S1-2

53
Q

Plantar interossei

A

plantar surface of base of metatarsals to dorsal digital expansions of digits 3-5

adduction and flexion (MP) of digits 3-5

lateral plantar nerve
S1-2

54
Q

Lumbricals

A

tendons of flexor digitorum longus to medial sides of dorsal expansions of digits 2-5

flexion of proximal phalanges (MP) and extension of IP joints

1: medial plantar nerve
2-4: lateral plantar nerve

anatomy (17 decks)

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