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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
Hip flexion muscles
Iliopsoas Sartorius Rectus femoris Pectineus
26
Knee flexion muscles
Biceps femoris Semitendinosus Semimembranosus
27
Knee extension muscles
Rectus femoris Vastus lateralis Vastus medialis Vastus intermedius
28
Vastus lateralis
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
Vastus medialis
O: intertorchanteric line and medial lip of linea aspera I: base of patella N: femoral nerve (L2-L4) A: extends leg at knee
30
Vastus intermedius
O: anterior and lateral surfaces of shaft of femur I: base of patella N: femoral nerve (L2-L4) N: extends leg at knee
31
Arcuate ligament complex
``` Arcuate ligament Oblique popliteal ligament LCL Popliteus Lateral head of gastroc ```
32
Plantarflexors
``` Tibialis posterior Gastrocnemius Soleus Peroneus longus Peroneus brevis Plantaris Flexor hallucis ```
33
Tibialis posterior
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
Gastrocnemius
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
Soleus
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
Plantaris
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
Peroneus longus
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
Peroneus brevis
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
Flexor hallucis
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
Dorsiflexors of ankle
Tibialis anterior Extensor hallucis longus Extensor digitorum longus Peroneus tertius
41
Extensor digitorum longus
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
Extensor hallucis longus
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
Tibialis anterior
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
Fibularis tertius
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
Inversion muscles of the foot
Tibialis posterior Tibialis anterior Flexor digitorum longus
46
Flexor digitorum longus
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
Eversion muscles of foot
Peroneus longus Peroneus brevis Peroneus tertius

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