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Anatomy Exam 3 > Leg Muscles > Flashcards

Leg Muscles Flashcards

(46 cards)

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1
Q

What are the muscles of the Anterior Compartment of the Leg?

A
  • Tibialis anterior
  • Extensor digitorum longus
  • Extensor Hallucis longus
  • Fibularis (Peroneus) Tertius
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2
Q

What are the muscles of the Lateral Compartment of the Leg?

A
  • Fibularis (Peroneus) Longus

- Fibularis (Peroneus) Brevis

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3
Q

What is the origin (proximal attachment) of the Tibialis anterior?

A

LATERAL CONDYLE and superior half of lateral surface of TIBIA and interosseous membrane

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4
Q

What is the insertion (distal attachment) of the Tibialis anterior?

A

Medial and inferior surface of MEDIAL CUNEIFORM and base of 1st metatarsal

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5
Q

What is the main action of the Tibialis anterior?

A

Dorsiflexes ankle and inverts foot

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6
Q

What is the origin (proximal attachment) of the Extensor digitorum longus?

A

LATERAL CONDYLE of Tibia and superior 3/4 of medial surface of fibula and interosseous membrane

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7
Q

What is the insertion (distal attachment) of the Extensor digitorum longus?

A

Middle and distal Phalanges of lateral 4 digits

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8
Q

What is the main action of the Extensor digitorum longus?

A

Extends lateral 4 digits and dorsiflexes ankle

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9
Q

What is the origin (proximal attachment) of the Extensor Hallucis longus?

A

Middle part of anterior surface of FIBULA and interosseous membrane

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10
Q

What is the insertion (distal attachment) of the Extensor Hallucis longus?

A

Dorsal aspect of base of distal phalanx of great TOE (hallux)

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11
Q

What is the main action of the Extensor Hallucis longus?

A

Extends great toes and dorsiflexes ankle

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12
Q

What is the origin (proximal attachment) of the Fibularis (Peroneus) Tertius?

A

Inferior third of anterior surface of FIBULA and interosseous membrane

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13
Q

What is the insertion (distal attachment) of the Fibularis (Peroneus) Tertius?

A

Dorsum of base of 5th metatarsal

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14
Q

What is the main action of the Fibularis (Peroneus) Tertius?

A

dorsiflexes ankle and aids in eversion of foot

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15
Q

What is the innervation of:

  • Tibialis anterior
  • Extensor digitorum longus
  • Extensor Hallucis longus
  • Fibularis (Peroneus) Tertius
A

Deep Fibular nerve (L4, L5)

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16
Q

What is the origin (proximal attachment) of the Fibularis (Peroneus) Longus?

A

Head and superior 2/3 of lateral surface of FIBULA

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17
Q

What is the insertion (distal attachment) of the Fibularis (Peroneus) Longus?

A

Base of 1st metatarsal and medial cuneiform

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18
Q

What is the origin (proximal attachment) of the Fibularis (Peroneus) Brevis?

A

Inferior 2/3 of lateral surface of FIBULA

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19
Q

What is the insertion (distal attachment) of the Fibularis (Peroneus) Brevis ?

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A

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

20
Q

What is the main action of the Fibularis (Peroneus) Longus and the Fibularis (Peroneus) Brevis ?

Study These Flashcards
A

Everts foot and weakly plantarfelxes ankle

21
Q

What is the innervation of the Fibularis (Peroneus) Longus and the Fibularis (Peroneus) Brevis ?

Study These Flashcards
A

Superficial fibular nerve (L5, S1, S2)

22
Q

What are the Superficial Muscles of the Posterior Compartment of the Leg?

Study These Flashcards
A
  • Gastocnemius
  • Soleus
  • Plantaris
23
Q

What is the origin (proximal attachment) of the Gastocnemius?

Study These Flashcards
A
  • Lateral Head: Lateral aspect of LATERAL CONDYLE of FEMUR

- Medial Head: Popliteal surface of FEMUR; superior to medial condyle

24
Q

What is the main action of the Gastocnemius?

Study These Flashcards
A
  • Plantarflexes ankle when knee is extended
  • raises heel during walking
  • flexes leg at knee joint
25
What is the origin (proximal attachment) of the Soleus?
- 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 bony attachments
26
What is the main action of the Soleus?
- Plantarflexes ankle independently of position of knee | - steadies leg on foot
27
What is the origin (proximal attachment) of the Plantaris?
- Inferior end of lateral supracondylar line of FEMUR | - Oblique popliteal ligament
28
What is the main action of the Plantaris?
Weakly assists gastrocnemius in Plantarflexing ankle
29
What is the insertion (distal attachment) of the Gastocnemius, Soleus, and the Plantaris?
Posterior surface of CALCANEUS via calcaneal tendon
30
What is the innevation of the Gastocnemius, Soleus, and the Plantaris?
Tibial nerve (S1, S2)
31
What are the Deep Muscles of the Posterior Compartment of the Leg?
- Popliteus - Flexor Hallucis Longus - Flexor Digitorum Longus - Tibialis Posterior
32
What is the origin (proximal attachment) of the Popliteus?
Lateral surface of LATERAL CONDYLE of FEMUR and lateral meniscus
33
What is the insertion (distal attachment) of the Popliteus?
Posterior Surface of TIBIA, superior to soleal line
34
What is the innevation of the Popliteus?
Tibial nerve (L4, L5, S1)
35
What is the main action of the Popliteus?
- Weakly flexes knee and unlocks it by rotating femur 5 degrees on fixed tibia - medially rotates tibia of unplanted limb
36
What is the origin (proximal attachment) of the Flexor Hallucis Longus?
- Inferior 2/3 of posterior surface of fibula | - Inferior part of interosseous membrane
37
What is the insertion (distal attachment) of the Flexor Hallucis Longus?
Base of distal phalanx of great TOE (hallux)
38
What is the main action of the Flexor Hallucis Longus?
- Flexes great toe at all joints - Weakly plantarflexes ankle - supports medial longitudinal arch of foot
39
What is the origin (proximal attachment) of the Flexor Digitorum Longus?
- Medial part of posterior of TIBIA inferior to soleal line, by a broad tendon to fibula
40
What is the insertion (distal attachment) of the Flexor Digitorum Longus?
Bases of distal phalanges of lateral 4 digits
41
What is the main action of the Flexor Digitorum Longus?
- Flexes lateral 4 digits - plantarflexes ankle - supports longitudinal arches of foot
42
What is the innervation of the Flexor Hallucis Longus and the Flexor Digitorum Longus?
Tibial nerve (S2, S3)
43
What is the origin (proximal attachment) of the Tibialis Posterior?
- Interosseous membrane - Posterior surface of tibia inferior to soleal line - Posterior surface of fibula
44
What is the insertion (distal attachment) of the Tibialis Posterior?
- Tuberosity of navicular, cuneiform, cuboid, and sustentaculum tali of calcaneus - Bases of 2nd, 3rd, 4th metatarsals
45
What is the innervation of the Tibialis Posterior?
Tibial nerve (L4, L5)
46
What is the main action of the Tibialis Posterior?
- plantarflexes ankle | - Inverts foot

Anatomy Exam 3 (5 decks)

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