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Popliteal Fossa And Lower Leg Muscles Flashcards

1
Q

Tibialis Anterior origin

A

Lateral condyle and superior 1/2 of lateral tibia

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2
Q

Tibialis Anterior insertion

A

Medial and inferior surfaces of medial cuneiform and 1st metatarsal

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3
Q

Tibialis anterior action

A
  • dorsiflexes and inverts foot

- supports the medial longitudinal arch

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4
Q

Tibialis anterior innervation

A

Deep fibular (peroneal) nerve (L4, L5)

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5
Q

Extensor Hallucis longus origin

A

Middle part of anterior surface of fibula and interosseus membrane

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6
Q

Extensor Hallucis longus insertion

A

Dorsal aspect of base of distal phalanx of hallux

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7
Q

Extensor Hallucis longus action

A

Extends hallux and dorsiflexes foot

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8
Q

Extensor hallucis longus innervation

A

Deep fibular (peroneal) nerve (L4, L5)

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9
Q

Extensor digitorum longus origin

A
  • lateral condyle of tibia
  • superior 3/4 of anterior surface of fibula
  • interosseus membrane
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10
Q

Extensor digitorum longus insertion

A

Middle and distal phalanges of lateral 4 digits

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11
Q

Extensor digitorum longus action

A

Extends lateral 4 digits and dorsiflexes foot

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12
Q

Extensor digitorum longus innervation

A

Deep fibular (peroneal) nerve (L4, L5)

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13
Q

Peroneus (fibular) tertius origin

A

Inferior 1/3 of anterior surface of fibula and interosseus membrane

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14
Q

Peroneus (fibular) tertius insertion

A

Dorsum of base of 5th metatarsal

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15
Q

Peroneus (fibular) tertius action

A

Dorsiflexes foot and aids in eversion

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16
Q

Peroneus (fibular) tertius innervation

A

Deep fibular (peroneal) nerve (L4, L5)

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17
Q

Peroneus (fibular) longus origin

A

Head and superior 2/3 of lateral surface of fibula

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18
Q

Peroneus (fibular) longus insertion

A

Base of first metatarsal and medial cuneiform

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19
Q

Peroneus (fibular) longus action

A
  • everts foot and weakly plantarflexes

- tendon supports the transverse and both medial and lateral longitudinal arches

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20
Q

Peroneus (fibular) longus innervation

A

Superficial fibular (peroneal nerve) (L5, S1, S2)

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21
Q

Peroneus (fibular) brevis origin

A

Inferior 2/3 of lateral surface of fibula

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22
Q

Peroneus (fibular) brevis insertion

A

Dorsal surface of tuberosity on lateral side of base of 5th metatarsal

23
Q

Peroneus (fibular) brevis action

A

Everts foot and weakly plantarflexes

24
Q

Peroneus (fibular) brevis innervation

A

Superficial fibular (peroneal) nerve (L5, S1, S2)

25
Q

Gastrocnemius lateral head origin

A

Lateral aspect of lateral condyle of femur

26
Q

Gastrocnemius medial head origin

A

Popliteal surface of femur, superior to medial condyle

27
Q

Gastrocnemius insertion

A

Posterior surface of calcaneus via tendo calcaneus

28
Q

Gastrocnemius actiion

A
  • plantar flexes foot
  • raises heel during walking
  • flexes knee joint
29
Q

Gastrocnemius innervation

A

Tibial nerve (S1, S2)

30
Q

Soleus origin

A
  • posterior aspect of head of fibula
  • superior 1/4 of fibula
  • soleal line
  • medial border of tibia
31
Q

Soleus insertion

A

Posterior surface of calcaneus via tendo calcaneus

32
Q

Soleus action

A
  • plantar flexes foot

- raises heel during walking

33
Q

Soleus innervation

A

Tibial nerve (S1, S2)

34
Q

Plantaris origin

A
  • inferior end of lateral supracondylar line of femur

- oblique popliteal ligament

35
Q

Plantaris insertion

A

Fuses with tendo calcaneus

36
Q

Plantaris action

A

Weakly assists in plantarflexion and flexion of knee

37
Q

Plantaris innervation

A

Tibial nerve (S1, S2)

38
Q

Popliteus origin

A
  • lateral surface of lateral condyle of femur

- lateral meniscus

39
Q

Popliteus insertion

A

posterior surface of tibia, superior to soleal line

40
Q

Popliteus action

A

-weakly flexes knee and unlocks it

rotates femur lateral on fixed tibia) or (medically rotates tibia on fixed femur

41
Q

Popliteus innervation

A

Tibial nerve (L4, L5, S1)

42
Q

Flexor Hallucis longus origin

A
  • inferior 2/3 of posterior surface of fibula

- inferior part of interosseus membrane

43
Q

Flexor Hallucis longus insertion

A

Base of distal phalanx of hallux

44
Q

Flexor Hallucis longus action

A
  • Flexes hallux at all joints
  • plantar flexes foot
  • supports longitudinal arch of foot
45
Q

Flexor Hallucis longus innervation

A

Tibial nerve (S2, S3)

46
Q

Flexor digitorum longus

A
  • medial part of posterior surface of tibia inferior to soleal line
  • by broad aponeurosis to fibula
47
Q

Flexor digitorum longus insertion

A

Bases of distal phalanges of lateral 4 digits

48
Q

Flexor digitorum longus action

A
  • flexes lateral 4 digits
  • plantarflexes foot
  • supports medial longitudinal arch of foot
49
Q

Flexor digitorum longus innervation

A

Tibial nerve (S2, S3)

50
Q

Tibialis posterior origin

A
  • interosseus membrane
  • posterior surface of tibia inferior to soleal line
  • posterior surface of fibula
51
Q

Tibialis posterior insertion

A
  • tuberosity of navicular
  • all three cuneiform bones
  • bases of 2nd, 3rd, and 4th metatarsals
52
Q

Tibialis posterior action

A
  • plantarflexes and inverts foot

- supports the transverse and medial longitudinal arch

53
Q

Tibialis posterior innervation

A

Tibial nerve (L4, L5)

Anatomy (11 decks)

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