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BMS172 - anatomy lower limb > leg muscles and innervations > Flashcards

leg muscles and innervations Flashcards

1
Q

Tibialis Anterior Attachments

A

lateral condyle and lateral surface of proximal half of tibia, interosseus membrane

medial and inferior surface of medial cuneiform and base of 1st metatarsal

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2
Q

Tibialis Anterior Actions

A

dorsiflexes ankle and inverts foot

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3
Q

Tibialis Anterior Innervation

A

Deep fibular nerve

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4
Q

Extensor Digitorum Longus Attachments

A

Lateral condyle of tibia, medial surface prximal 3/4 of fibula, interosseus membrane

middle and distal phalanges of lateral 4 digits

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5
Q

Extensor digitorum longus action

A

extends lateral 4 digits

dorsiflexes foot

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6
Q

Extensor Digitorum Longus Innervation

A

deep fibular nerve

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7
Q

Extensor Hallucis Longus attachments

A

middle part anterior surface of fibula and interosseus membrane

dorsal aspect of base of distal phalanx of 1st digit

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8
Q

Extensor Hallucis Longus Innervation

A

Deep fibular nerve

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9
Q

Fibularis Tertius attachment

A

Inferior third of anterior surface of fibula and interosseus membrane

dorsum of base of 5th metatarsal

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10
Q

Fibularis Tertius action

A

dorsiflexes foot

aids in eversion

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11
Q

Fibularis Tertius Innervation

A

deep fibular nerve

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12
Q

Fibularis Longus attachment

A

head and superior 2/3 lateral surface of fibular

Plantar aspect base 1st metatarsal and medial cuneiform

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13
Q

Fibularis Longus Action

A

evert and weakly plantarflex foot

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14
Q

Fibularis longus innervation

A

superficial fibular nerve

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15
Q

fibularis brevis attachment

A

inferior 2/3 lateral surface of fibula

dorsal surface of tuberosity of base of 5th metatarsal

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16
Q

Fibularis brevis action

A

evert and weakly plantarflexes foot

17
Q

fibularis brevis innervation

A

superficial fibular nerve

18
Q

Gastrocnemius attachment

A

medial head: popliteal surface superior to medial condyle

lateral head: lateral aspect of lateral condyle

calcaneal tendon

19
Q

Plantaris attachment

A

lateral supracondylar line of femur, oblique popliteal ligament

calcaneal tendon

(plantaris is absent in 5-10% of people. often used as a transplant muscle)

20
Q

Soleus Attachment

A

posterior head of fibula, soleal line of tibia

21
Q

Where do the Gastrocnemisu, plantaris, and soleus all attach? What action do they all do? What are they all innervated by>

A

All attach distally to posterior surface of calcaneus

all plantarflex the foot. Gastrocnemius flexes the knee

all innervated by the tibial nerve

22
Q

popliteus attachment

A

lateral surface of lateral condyle of femur, lateral meniscus

post surface of tibia superior to soleal line

23
Q

popliteus actions

A

weakly flexes leg at knee, medially rotates tibia if open chain (open chain = if foot is off the floor), laterally rotates femur if closed kinetic chain (unlock the knee)

24
Q

Popliteus innervation

A

tibial nerve

25
Q

Tibialis posterior attachment

A

posterior tibia inferior to soleal line, posterior interosseous membrane, posterior fibula

navicular tuberosity, plantar aspect of medial cuneiform, cuboid, calcaneus, and bases of metatarsals 2-4

26
Q

Tibialis posterior actions

A

platarflexes and inverts foot (primary inverter of the foot)

27
Q

Tibialis posterior innervations

A

tibial nerve

28
Q

flexor hallucis longus

A

inferior 2/3 posterior surface of fibula and interosseus membrane

base of 1st distal phalanx

29
Q

flexor hallucis longus action

A

flexes 1st digit (all joints), weakly plantarflexes foot

30
Q

flexor hallucis longus innervation

A

tibial nerve

31
Q

flexor digitorum longus attachment

A

medial part of posterior surface of tibia

base of 2nd-5th distal phalanges

32
Q

flexor digitorum longus action

A

flexes lateral 4 digits, plantarflexes foot

33
Q

flexor digitorum longus innervation

A

tibial nerve

BMS172 - anatomy lower limb (13 decks)

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