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Lower Extremity Muscles Flashcards

1
Q

Superior Gemellus

A

O: ischial spine
I: medial surface of greater trochanter
N: nerve to obturator internus
A: lateral rotation of hip, abduction when flexed

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2
Q

Quadratas Femoris

A

O: prox surface of ischial tuberosity
I: quadrate tubercle
N: nerve to quadratas femoris
A: lateral rotation of hip

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3
Q

Gluteus Maximus

A

O: ilium, sacrum, coccyx, aponeurosis of erector spinae and glute medius, sacrotuberous ligament
I: gluteal tuberosity and IT tract
N: inferior gluteal nerve
A: hip extension, lateral hip rot, stabilizes knee
upper: abduct
lower: adduct

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4
Q

Gluteus Minimis

A

O: ilium b/t:anterior and inferior gluteal lines, margain of greater sciatic notch
I: anterior border of greater trochanter, hip joint capsule
N: superior gluteal nerve
A:hip abduction and medial rotation

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5
Q

Inferior Gemellus

A

O: prox part of ischial tuberosity
I: med surface of greater trochanter
N: nerve to quadratas femoris
A: lateral rotation of hip, abduction when hip flexed

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6
Q

Obturator Internus

A

O: ischiopubic ramus, margain of obturator foramen
I: med surface of greater trochanter
N:nerve to obturator internus
A: lateral rotation, abduction when hip is flexed

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7
Q

Piriformis

A

O: sacrum, ilium, SI joint, sacrotuberous ligament
I: superior border of greater trochanter
N: nerve to piriformis
A: lat rotation of hip joint, assists hip ext, abduction when hip is flexed

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8
Q

Gluteus Medius

A

O: ilium b/t anterior and posterior gluteal lines, gluteal aponeurosis
I: oblique ridge on lateral surface of greater trochanter
N: superior gluteal nerve
A: abducts hip
ant: med rot and hip flexion
post: lat rot and hip ext

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9
Q

Sartorius

A 
O: ASIS and notch below
I: pes anserine
N: femoral nerve 
A: hip: flexion, abduction, lateral rotation
  knee: flexion, medial rotation
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10
Q

Rectus Femoris

A

O: AIIS, acetabulum, hip joint capsule
I: base of patella
N: femoral
A: knee extension and hip flexion

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11
Q

Pectineus

A

O: pecten pubis
I: pectineal line of femur
N: femoral nerve
A: hip adduction, assist hip flexion

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12
Q

Tensor Fascia Lata (TFL)

A

O: iliac crest, and ASIS
I: IT band
N: superior gluteal nerve
A: hip flexion, medial rotation, abduction

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13
Q

Vastus Medialis

A

O: inertrochanteric line, medial lip of linea aspera
I: patella
N:femoral
A: knee extension

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14
Q

Vastus Intermedius

A

O: anterior, lateral, upper 2/3 of femur
I: patella
N: femoral
A: knee extension

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15
Q

Vastus Lateralis

A

O: gluteal tuberosity, intertrochanteric line, greater trochanter, lateral lip of linea aspera
I: patella
N:femoral
A: knee extension

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16
Q

Adductor Magnus (origin and insertion)

A

O: adductor: ischiopubic ramus
hamstring: ischial tuberosity
I: adductor: linea aspera, medial supracondylar ridge
hamstring: adductor tubercle

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17
Q

Adductor Magnus (innervation and action)

A

N: adductor: obturator
hamstring: sciatic
A: hip adduction, assist ext and flexion

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18
Q

Gracilis

A

O: inferior pubic ramus, ischial ramus
I: pes anserine
N: obturator nerve
A: hip adduction, knee flexion, medial rot of knee

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19
Q

Adductor Longus

A

O: pubis
I: middle 1/3 of med. lip linea aspera
N: obturator nerve
A: hip adduction, assists w/ flexion

20
Q

Adductor Brevis

A

O: inferior ramus and body of pubis
I: pectineal line of femur
N: obturator nerve
A: hip adduction, hip flexion

21
Q

Obturator Externus

A

O: ischiopubic ramus, margain of obturator foramen
I: trochanteric fossa of femur
N: obturator nerve
A: lat rotation of hip, assists w/ hip adduction

22
Q

Semitendinosus

A

O: ischial tuberosity
I: medial side of proximal tibial shaft
N: sciatic nerve- tibial division
A: knee flexion, medial rot, hip ext

23
Q

Biceps Femoris

A

O: long> ischial tuberosity, sacrotuberous ligament
short> lateral lip of linea aspera, lateral supracondylar
I: head of fibula, lateral tibial condyle
N: sciatic nerve- tibial nerve
A: knee flexion, lat rotation, hip extension

24
Q

Semimembranosus

A

O: ischial tuberosity
I: medial condyle of tibia
N: Sciatic nerve-tibial nerve
A: knee flexion, hip extension

25
Flexor Digitorum Longus
O:shaft of tibia I: distal phalanx 2-5 N: tibial n. A: flexes MP, PIP, DIP digits 2-5
26
Flexor Hallucis Longus
O: shaft of fibula I: distal phalanx of big toe N: tibial nerve A: flexes IP of big toe
27
Tibialis Posterior
O: tibia inferior to soleal line, shaft and head of fibula I: navicular, cuboid, cuneiforms, MT 2-4 N: tibial A: foot inversion
28
Soleus
O: soleal line, shaft and head of fibula I: calcaneus N: tibial A: plantar flexion
29
Plantaris
O: lateral supracondylar line I: calcaneus N: tibial A: assists plantar flexion and knee flexion
30
Popliteus
O: lat condyle of femur, capsule of knee joint, lat meniscus, arcuate popliteal ligament I: post. surface of tibia above soleal line N: tibial A: knee flexion nd med rotation
31
Gastrocnemius
O: lat: lat femoral condyle, femur shaft, lat supracondylar line, knee joint capsule med: med. femoral condyle and popliteal surface, knee joint capsule I: calcaneus N: tibial nerve A: ankle planter flexion
32
Tibialis Anterior
O: lateral tibial condyle and shaft I: medial cuneiform and 1st MT N: deep fibular nerve A: ankle dorsiflexion, foot inversion
33
Extensor Hallucis Longus
O: shaft of fibula I: distal phalanx of great toe N: deep fibular nerve A: extension of MP and IP of great toe
34
Extensor Digitorum Longus
O: lateral condyle of tibia, upper 3/4 of med. fibula I: dorsum of toes 2-5 N: deep fibular nerve A: MP extension of toes 2-5
35
Fibularis Longus
O:head and upper fibula I: medial cuneiform and 1st metatarsal N: superficial fibular nerve A: foot eversion
36
Fibularis Brevis
O: distal 2/3 fibula I: tuberosity of 5th metatarsal N: superficial fibular nerve A: foot eversion
37
Fibularis Tertius
O: distal 1/3 of med fibula I: dorsum of base of 5th metatarsal N: deep fibular nerve A: ankle dorsiflexion
38
Plantar Interossei
O: unipennate> metatarsals 3-5 I: proximal phalanx of same toes N: lateral plantar nerve A: adduction of toes 3-5
39
Dorsal Interossei
``` O: bipennate> metatarsals bones I: 1> proximal phalanx 2nd digit 2-4> proximal phalanges of toes 2-4 *all insert into extensor digitorum N:lateral plantar nerve A: abduction of toes ```
40
Abductor Hallucis
O:medial process of tuberosity of calcaneus I:medial side of proximal phalanx of great toe N: medial plantar nerve A: abducts great toe
41
Flexor Digitorum Brevis
O:medial process of tuberosity of calcaneus I: both sides of middle phalanx of toes 2-5 N: medial plantar nerve A: flexion of MP, PIP of toes 2-5
42
Abductor Digiti Minimi
O:med and lat processes of tuberosity of calcaneus I: lateral side of proximal phalanx of 5th toe N: lateral plantar nerve A: abduction and MP flexion of 5th toe
43
Adductor Hallucis
O: obllique> metatarsals 2-4 transverse> plantar metatarsalphalangeal ligaments of toes 3-5 and deep transverse metatarsal ligaments I: oblique> proximal phalanx of 1st digit, lateral sesamoid bone of hallux transverse> lateral sesamoid of hallux N: lateral plantar nerve A: adduction of great toe
44
Flexor Digiti Minimi Brevis
O:plantar surface of 5th metatarsal I: proximal phalanx of toes N: lateral plantar nerve A: MP flexion of toes
45
Flexor Hallucis Brevis
``` O: lateral> plantar surface of cuboid, lateral cuneiform medial> tendon of tibialis posterior I: proximal phalanx of big toe N: medial plantar nerve A: MP flexion of great toe ```
46
Quadratas Plantae
O:lateral> lateral border of plantar surface of calcaneus and long plantar ligament medial> medial border of calcaneus and long plantar ligament I:tendon of flexor digitorum longus N: lateral plantar nerve A: DIP flexion of toes 2-5

Muscles (4 decks)

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