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Gross Anatomy > Muscles of the Leg > Flashcards

Muscles of the Leg Flashcards

1
Q

Tibialis Anterior

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Upper lateral surface of tibia, interosseous membrane
  • Distal Attachment: Medial cuneiform, base of 1st metatarsal
  • Action: Dorsiflexion and inversion of foot
  • Innervation: Deep fibular nerve
  • Blood Supply: Anterior tibial artery
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2
Q

Extensor Hallucis Longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Middle section of fibula, interosseous membrane
  • Distal Attachment: Base of distal phalanx of great toe
  • Action: Dorsiflexion of foot, extension of great toe
  • Innervation: Deep fibular nerve
  • Blood Supply: Anterior tibial artery
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3
Q

Extensor Digitorum Longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Upper 3/4 of fibula, interosseous membrane
  • Distal Attachment: Middle and distal phalanges of lateral 4 digits
  • Action: Dorsiflexion of foot, extension of lateral 4 digits
  • Innervation: Deep fibular nerve
  • Blood Supply: Anterior tibial artery
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4
Q

Fibularis Tertius

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Inferior 1/3 of fibula, interosseous membrane
  • Distal Attachment: Base of 5th metatarsal
  • Action: Eversion of foot, helps dorsiflex foot
  • Innervation: Deep fibular nerve
  • Blood Supply: Anterior tibial artery
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5
Q

Fibularis Longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Upper lateral surface of fibula
  • Distal Attachment: Medial (1st) cuneiform and base of first metatarsal
  • Action: Eversion of foot, weak plantarflexion of foot
  • Innervation: Superficial fibular nerve
  • Blood Supply: Anterior tibial artery, fibular artery
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6
Q

Fibularis Brevis

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Lower lateral surface of fibula
  • Distal Attachment: Dorsal tubercle of base of 5th metatarsal
  • Action: Eversion of foot, weak plantarflexion of foot
  • Innervation: Superficial fibular nerve
  • Blood Supply: Anterior tibial artery, fibular artery
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7
Q

Gastrocnemius

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment:
    • Medial Head: Posterior surface of femur just superior to medial femoral condyle
    • Lateral Head: Lateral surface of lateral femoral condyle
  • Distal Attachment: Posterior surface of calcaneus (via calcaneal tendon)
  • Action: Plantarflexion of foot, flexion of knee
  • Innervation: Tibial nerve
  • Blood Supply: Popliteal artery, posterior tibial artery
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8
Q

Soleus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Soleal line of tibia, posterior surface of fibular head (forms tendinous arch)
  • Distal Attachment: Posterior surface of calcaneus (via calcaneal tendon)
  • Action: Plantarflexion of foot
  • Innervation: Tibial nerve
  • Blood Supply: Popliteal artery, posterior tibial artery, fibular artery
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9
Q

Plantaris

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Supracondylar line of femur
  • Distal Attachment: Posterior surface of calcaneus (via calcaneal tendon)
  • Action: Assists in plantarflexion of foot and flexion of knee
  • Innervation: Tibial nerve
  • Blood Supply: Popliteal artery
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10
Q

Popliteus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Lateral surface of lateral femoral condyle, lateral meniscus
  • Distal Attachment: Posterior surface of tibia above soleal line
  • Action: Unlocks knee (by rotating femur slightly laterally on fixed tibia)
  • Innervation: Tibial nerve
  • Blood Supply: Inferior medial and lateral genicular arteries
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11
Q

Flexor Digitorum Longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Posterior surface of tibia below soleal line
  • Distal Attachment: Base of distal phalanx of lateral 4 digits
  • Action: Flexion of digits, plantarflexion of foot
  • Innervation: Tibial nerve
  • Blood Supply: Posterior tibial artery
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12
Q

Flexor Hallucis Longus

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Inferior 2/3 of posterior surface of fibula
  • Distal Attachment: Base of distal phalanx of great toe
  • Action: Flexion of great toe, plantarflexion of foot
  • Innervation: Tibial nerve
  • Blood Supply: Fibular artery
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13
Q

Tibialis Posterior

Proximal Attachment

Distal Attachment

Action

Innervation

Blood Supply

A
  • Proximal Attachment: Interosseous membrane, posterior surface of tibia and fibula
  • Distal Attachment: Tuberosity of navicular, cuneiform, cuboid
  • Action: Inversion of foot, plantarflexion of foot
  • Innervation: Tibial nerve
  • Blood Supply: Fibular artery
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Gross Anatomy (21 decks)

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