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USA Term 2 > Gross 2 Lower Leg **Muscles, Nerves, Actions > Flashcards

Gross 2 Lower Leg **Muscles, Nerves, Actions Flashcards

1
Q

What are the attachments of the Tibialis Anterior?

A

Proximal: Lateral condyle and superior half of lateral surface of tibia and interosseous membrane
(under extensor retinaculum)

Distal: Medial and inferior surface of medial cuneiform and base of 1st metatarsal

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2
Q

What nerve innervates the Tibialis Anterior? and roots?

A

Deep Fibular Nerve (L4,L5 and S1)

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3
Q

What are the actions of Tibialis Anterior?

A

Dorsiflexes ankle and inverts foot

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4
Q

What are the attachments of the Extensor Digitorum Longus?

A

Proximal: Lateral condyle of tibia and superior three quarters of medial surface of fibula and interosseous membrane
(Under extensor retinaculum)

Distal: Middle and distal phalanges of lateral four digits

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5
Q

What nerve innervates Extensor Digitorum Longus? and roots?

A

Deep Fibular Nerve (L4, L5, and S1)

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6
Q

What is the action of Extensor Digitorum Longus?

A

Extends lateral four digits and dorsiflexes ankle

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7
Q

What are the attachments of Extensor Hallucis longus?

A

Proximal: Middle part of anterior surface of fibula and interosseous membrane

Distal: Dorsal aspect of base of distal phalanx of great toe (hallux)

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8
Q

What nerve innervates Extensor Hallucis Longus? and root?

A

Deep Fibular Nerve (L4, L5, S1)

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9
Q

What are the actions of Extensor Hallucis Longus?

A

Extends great toe (hallux) and dorsiflexes ankle

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10
Q

What are the attachments of Fibularis Tertius?

A

Proximal: Inferior third of anterior surface of fibula and interosseous membrane

Distal: Dorsum of base of 5th metatarsal

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11
Q

What nerve innervates Fibularis Tertius?

A

Deep Fibular Nerve (L4, L5, and S1)

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12
Q

What is the action of Fibularis Tertius?

A

Dorsiflexes ankle and aids in eversion of foot

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13
Q

What are the attachments of Fibularis Longus?

A

Proximal: Head and Superior two-thirds of lateral surface of fibula

Distal: Base of 1st metatarsal and medial cuneiform

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14
Q

What nerve innervates Fibularis Longus?

A

Superficial Fibular Nerve (L5, S1, S2)

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15
Q

What is the action of Fibularis Longus?

A

Everts foot and weakly planterflexes ankle

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16
Q

What are the attachments for Fibularis Brevis?

A

Proximal: Inferior two-thirds of lateral surface of fibula

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

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17
Q

What nerve innervates Fibularis Brevis?

A

Superficial Fibular Nerve
(L5, S1, S2)

18
Q

What are the actions of Fibularis Brevis?

A

Everts foot and weakly platarflexes ankle

19
Q

What are the attachments for Gastrocnemius? (Lateral Head)

A

Proximal: Lateral Aspect of lateral condyle of femur

Distal: Posterior surface of calcaneus via calcaneal tendon

20
Q

What are the attachments for Gastrocnemius? (Medial Head)

A

Proximal: Popliteal surface of femur; superior to medial condyle

Distal: (same as lateral head)
Posterior surface of calcaneus via calcaneal tendon

21
Q

What nerve innervates the Gastrocnemius?

A

Tibial Nerve (L4-S3)

22
Q

What are the actions of Gastrocnemius?

A

Planterflexes ankle when knee is extended; raises heel during walking; flexes leg at knee joint

23
Q

What are the attachments for Soleus?

A

Proximal: Posterior aspect of head and superior quarter of posterior surface of fibula; Soleal line and middle third of medial border of tibia; Tendinous arch extending between the boney attachments

Distal: Posterior surface of calcaneus via calcaneal tendon

24
Q

What nerve innervates soleus?

A

Tibial Nerve (L4-S3)

25
Q

What are the actions of Soleus?

A

Planterflexes ankle independent of position of knee; steadies leg on foot

26
Q

What are the attachments for Plantaris?

A

Proximal: Inferior end of lateral supracondylar line of femur; oblique popliteal ligament

Distal: Posterior surface of calcaneus via calcaneal tendon

27
Q

What nerve innervates Plantaris?

A

Tibial Nerve (L4-S3)

28
Q

What are the actions for Plantaris?

A

Weakly assist gastrocnemius in planterflexing ankle

29
Q

What are the attachments of Popliteus?

A

Proximal: Lateral surface of lateral condyle of femur and lateral meniscus

Distal: Posterior surface of tibia and superior to soleal line

30
Q

What nerve innervates Popliteus?

A

Tibial Nerve (L4-S3)

31
Q

What are the actions of Popliteus?

A

Weakly flexes knee and Unlocks it by rotating femur 5° on fixed tibia; medially rotates tibia of unplanted limb

32
Q

What are the attachments for Flexor Hallucis Longus?

A

Proximal: Inferior two thirds of posterior surface of fibula; inferior part of interosseous membrane

Distal: Base of distal phalanx of great toe (Hallux)

33
Q

What nerve innervates Flexor Hallucis Longus?

A

Tibial Nerve (L4-S3)

34
Q

What are the actions of Flexor Hallucis Longus?

A

Flexes great toe at all joint; weakly planterflexes ankle; supports medial longitudinal arch of foot

35
Q

What are the attachments of Flexor Digitorum Longus?

A

Proximal: Medial part of posterior surface of tibia inferior to soleal line; by a broad tendon to fibula

Distal: Bases of distal phalanges of lateral four digits

36
Q

What nerve innervates Flexor Digitorum Longus?

A

Tibial Nerve (L4-S3)

37
Q

What are the actions for Flexor Digitorum Longus?

A

Flexes lateral four digits; planterflexes ankle; supports longitudinal arches of foot

38
Q

What are the attachments for Tibialis Posterior?

A

Proximal: Interosseous membrane; posterior surface of tibia inferior to soleal line; posterior surface of fibula

Distal: Tuberosity of navicular(only one we need), cuneiform, cuboid, and sustentaculum tali of calcaneus; bases of 2nd, 3rd, and 4th metatarsals

39
Q

What nerve innervates Tibialis Posterior?

A

Tibial Nerve (L4-S3)

40
Q

What is the actions for Tibialis Posterior?

A

Planterflexes ankle; inverts foot

USA Term 2 (19 decks)

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