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Boards > LE Musculature > Flashcards

LE Musculature Flashcards

1
Q

Iliopsoas

A

O:
Psoas major: sides of T12-L5 vertebrae and discuss between, TP of all l/s
Iliacus: iliac crest, iliac fossa, all of sacrum,anterior sacroiliac ligaments
I: lesser trochanter of femur
N:
Psoas: anterior rami of lunar nerves (L1-L3)
iliacus: femoral nerve (L2,L3)
A: flexing thighs at the hip.

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2
Q

Sartorius

A

O:
ASIS
I: superior part of medial surface of tibia
N: Femoral nerve (L2/L3)
A: Flexes, abducts, and ER thigh. Flexes leg at knee joint

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3
Q

Rectus femoris

A

O: AIIS
I: base of patella
N: Femoral (L2-L4)
A: extends leg a knee, helps to flex thigh

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4
Q

Pectineus

A

O: superior Ramus of pubis
I: Pectineus line of femur, just inferior to lesser trochanter
N: Femoral nerve (L2,L3)
A: adducts and flexes thigh, assists in medial rotation

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5
Q

Hip extension muscles

A 
Gluteus Maximus
Gluteus mediums
Semitendinosus
Semimembranosus
Biceps femoris
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6
Q

Gluteus Maximus

A

O: ilium posterior to posterior gluteal line, dorsal surface of sacrum and coccyx, sacrotuberous ligament
I: lateral condyle of tibia, gluteal tuberosity of femur
N: inferior gluteal nerve (L5,S1,S2)
A: extends thought and assists in lateral rotation

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7
Q

Gluteus medius

A

O: external surface of ilium between anterior and posterior gluteal lines
I: lateral surface of greater trochanter of femur
N: superior gluteal nerve (L4,L5,S1)
A: abduct and medial rotate the thigh

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8
Q

Semitendinosus

A

O: ischial tuberosity
I: medial surface of superior part of tibia
N: tibial division of sciatic nerve (L5,S1,S2)
A: extend thigh, flex leg and rotate it medically when knee is flexed

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9
Q

Semimembranosus

A

O: ischial tuberosity
I: posterior part of medial condyle of tibia
N: tibial division of sciatic nerve (L5,S1,S2)
A: extend thigh, flex leg and rotate it medially when the knee is flexed

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10
Q

Biceps femoris

A

O:
Long head: ischial tuberosity
Short head: linea aspera and lateral supracondylar ridge of femur
I: lateral side of head of fibula
N: long head: tibial division of sciatic nerve (L5-S2), short head: fibular division of sciatic nerve (L5-S2)
A: flexes leg and rotates it laterally when the knee is flexed, extends thigh

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11
Q

Hip abduction muscles

A 
Gluteus medius
Gluteus minimus
Piriformis
Obturator internus
TFL
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12
Q

Gluteus minimus

A

O: external surface of ilium between anterior and inferior gluteal lines
I: anterior surface of greater trochanter of femur
N: superior gluteal nerve (L4,L5,S1)
A: abduct and medial rotate thigh

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13
Q

Piriformis

A

O: anterior surface of 2nd-4th sacral segments, superior margin of greater sciatic notch, sacrotuberous ligaments
I: superior border of greater trochanter of femur
N: Branches of anterior rami of S1, S2
A: laterally rotates extended thigh, abducts flexed thigh, stabilizes joint

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14
Q

Obturator internus

A

O: pelvic surface of ilium and ischium
I: medial surface of greater trochanter
N: nerve to obturator internus (L5,S1)
A: laterally rotates extended thigh, abducts flexed thigh, stabilizes joint

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15
Q

TFL

A

O: ASIS, anterior part of iliac crest
I: iliotibial tract, lateral condyle of tibia (Gerdy’s tubercle)
N: Superior gluteal nerve (L4,L5,S1)
A: flexes thigh

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16
Q

Hip adduction muscles

A

Adductor Magnus
Adductor longus
Adductor brevis
Gracilis

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17
Q

Adductor Magnus

A

O:
Adductor part: inferior Ramus of pubis, Ramus of ischium
Hamstring part: ischial tuberosity
I:
Adductor part: gluteal tuberosity, linea aspera
Hamstring part: adductor tubercle of femur
N: adductor part: obturator nerve (L2-L4)
Hamstring part: tibial part of sciatic nerve (L4)
A: adducts thigh
Adductor part flexes thigh
Hamstring part extends the thigh

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18
Q

Adductor longus

A

O: body of pubis inferior to pubic crest
I: middle third of linea aspera of femur
N: obturator nerve (L2-L4)
A: adducts thigh

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19
Q

Adductor brevis

A

O: body and inferior Ramus of pubis
I: Pectineal line and proximal part of linea aspera of femur
N: obturator nerve (L2-L4)
A: adducts thigh

20
Q

Gracilis

A

O: body and inferior Ramus of pubis
I: superior part of medial surface of tibia
N: Obturator nerve (L2,L3)
A: adducts thigh, flexes thigh, helps to medially rotate

21
Q

Hip medial rotation muscles

A 
TFL
Glut medius
Glut minimus
Pectineus
Adductor longus
22
Q

Hip lateral rotation muscles

A 
Glut Maximus
Obturator externus
Obturator internus
Piriformis
Gemelli
Sartorius
23
Q

Obturator externus

A

O: margins of Obturator forament and Obturator membrane
I: trochanteric fossa of femur
N: obturator nerve (L3,L4)
A: laterally rotates thigh; steadies head of femur in acetabulum

24
Q

Gemelli

A 
O: 
Superior: ischial spine
Inferior: ischial tuberosity
I: medial surface of greater trochanter
N: superior: Obturator internus 
inferior: quadratus femorus nerve
A: laterally rotates extended thigh, abduct flexed thigh, stabilizes joint
25
Q

Hip flexion muscles

A

Iliopsoas
Sartorius
Rectus femoris
Pectineus

26
Q

Knee flexion muscles

A

Biceps femoris
Semitendinosus
Semimembranosus

27
Q

Knee extension muscles

A

Rectus femoris
Vastus lateralis
Vastus medialis
Vastus intermedius

28
Q

Vastus lateralis

A

O: greater trochanter and lateral lip of linea aspera
I: base of patella
N: femoral nerve (L2-L4)
A: extends leg at knee joint

29
Q

Vastus medialis

A

O: intertorchanteric line and medial lip of linea aspera
I: base of patella
N: femoral nerve (L2-L4)
A: extends leg at knee

30
Q

Vastus intermedius

A

O: anterior and lateral surfaces of shaft of femur
I: base of patella
N: femoral nerve (L2-L4)
N: extends leg at knee

31
Q

Arcuate ligament complex

A 
Arcuate ligament
Oblique popliteal ligament
LCL
Popliteus
Lateral head of gastroc
32
Q

Plantarflexors

A 
Tibialis posterior
Gastrocnemius
Soleus
Peroneus longus
Peroneus brevis
Plantaris
Flexor hallucis
33
Q

Tibialis posterior

A

O: interosseous membrane,posterior surface of tibia inferior to soleal line, posterior surface of fibula
I: tuberosity of navicular, cuneiforms, cuboid, bases of 2nd-4th metatarsals
N: tibial nerve (L4,L5)
A: plantar flexes ankle, inverts foot, supports medial longitudinal arch of foot

34
Q

Gastrocnemius

A

O:
Lateral head: lateral aspect of lateral condyle of femur
Medial: popliteal surface of femur superior to medial condyle
I: calcaneal tendon
N: tibial nerve (S1,S2)
A: plantar flexes ankle when knee is extended, flexes leg at knee

35
Q

Soleus

A

O: posterior aspect of head of fibula, superior quarter of posterior surface of fibula, soleal line, medial border of tibia
I: calcaneal tendon
N: tibial nerve (S1,S2)
A: plantar flexes ankle, steadies leg on foot

36
Q

Plantaris

A

O: inferior end of lateral supracondylar line of femur and oblique popliteal ligament
I: calcaneal tendon
N: tibial nerve (S1, S2)
A: weak in plantarflexion

37
Q

Peroneus longus

A

O: head and superior two thirds of lateral surface of fibula
I: base of 1st metatarsal and medial cuneiform
N: superficial fibular nerve (L5-S2)
A: evert foot, weakly plantarflex ankle, supports transverse arch

38
Q

Peroneus brevis

A

O: inferior 2/3 of lateral surface of fibula
I: dorsal surface of tuberosity of base of 5th metatarsal
N: superficial fibular nerve (L5-S2)
A: everts foot and weakly plantarflexes

39
Q

Flexor hallucis

A

O: inferior 2/3 of posterior surface of fibula and inferior part of interosseous membrane
I: base of distal phalanx of great toe
N: tibial nerve (S2,S3)
A: flexes great toe at all joints, weakly plantarflexes ankle, supports medial longitudinal arch

40
Q

Dorsiflexors of ankle

A

Tibialis anterior
Extensor hallucis longus
Extensor digitorum longus
Peroneus tertius

41
Q

Extensor digitorum longus

A

O: lateral condyle of tibia and superior 3/4 of anterior surface of interosseous membrane
I: middle and distal phalanges of lateral 4 digits
N: deep fibular nerve (L5, S1)
A: extends lateral 4 digits, dorsiflexes ankle

42
Q

Extensor hallucis longus

A

O: middle part of anterior surface of fibula and interosseous membrane
I: dorsal aspect of base of distal phalanx of great toe
N: deep fibular nerve (L5,S1)
A: extends great toe, dorsiflexes ankle

43
Q

Tibialis anterior

A

O: lateral condyle and superior half of lateral surface of tibia and interosseous membrane
I: medial and inferior surfaces of medial cuneiform and base of 1st metatarsal
N: deep fibular nerve (L4,L5)
A: dorsiflexes ankle, inverts foot, supports medial longitudinal arch of foot

44
Q

Fibularis tertius

A

O: inferior third of anterior surface of fibula and interosseous membrane
I: dorsum of base of 5th metatarsal
N: deep fibular nerve (L5,S1)
A: dorsiflexes ankle; aids in eversion of foot

45
Q

Inversion muscles of the foot

A

Tibialis posterior
Tibialis anterior
Flexor digitorum longus

46
Q

Flexor digitorum longus

A

O: medial part of posterior surface of tibia inferior to soleal line
I: bases of distal phalanges of lateral 4 digits
N: tibial nerve (S2,S3)
A: flexes lateral 4 digits, PF ankle, supports longitudinal arches of foot

47
Q

Eversion muscles of foot

A

Peroneus longus
Peroneus brevis
Peroneus tertius

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