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Muscles of the Lower Leg and Foot
Lab Two Anatomy Two
24
Anatomy
Undergraduate 3
02/07/2011

Additional Anatomy Flashcards

 


 

Cards

Term
Tibialis Anterior
Definition

Anterior Superficial Muscle

 

O – Lateral condyle and upper 2/3 of tibial shaft; interosseous membrane

I – Medial cuneiform and first metatarsal

A – Dorsiflexion, inversion, supports medial longitudinal arch

Term
Extensor Digitorum Longus
Definition

Anterior Superficial Muscle

 

O – Lateral condyle of tibia; proximal ¾ of fibula; interosseous membrane

I – Middle/distal phalanges of toes 2-5

A – Toe extension, dorsiflexion

Term
Fibularis (peroneus) tertius
Definition

Anterior Superficial Muscle

 

O – Distal anterior fibula; interosseous membrane

I – Dorsum of fifth metatarsal

A – Dorsiflexion and everts foot

Term
Extensor Hallucis Longus
Definition

Anterior Superficial Muscle

 

O – Anteromedial fibula; interosseous membrane

I – Distal phalanx of big toe

A – Extend great toe, dorsiflexion

Term
Fibularis (perneous) longus
Definition

Lateral Superficial Muscle

 

O – Upper portion of lateral fibula

I – First metatarsal and medial cuneiform

A – Plantar flexion, foot eversion; keeps foot flat on ground

 

 

Term
Fibularis (perneous) brevis
Definition

Lateral Superficial Muscle

 

O – Distal fibula shaft

I –Proximal end of fifth metatarsal

A – Plantar flexion and eversion

Term

Triceps Surae 

complex of which two muscles

Definition

Both located Posterior Superficial leg muscles

1. Gastrocnemius

2. Soleus

Term
Gastrocnemius
Definition

Posterior Superficial Muscle

 

  O – Medial and lateral condyles of 

femur

   I – Posterior calcaneous

  A – Plantar flexes foot when knee is extended; can also flex knee when foot is dorsiflexed

Term
Soleus
Definition

Posterior Superficial Muscle

 

  O – Superficial tibia, fibula, and interosseous membrane

   I – Posterior calcaneous

  A – Plantar flexes foot, locomotor and postural

Term
Flexor Digitorum Longus
Definition

Posterior Deep Muscle

 

O – Posterior tibia

I – Under foot to distal phalanx of toes 2-5

A – Plantar flexion, foot inversion; flexes toes; helps foot “grip” ground

Term
Flexor Hallucis Longus
Definition

Posterior Deep Muscle

 

O – Midshaft of fibula; interosseous membrane

I – Under foot to distal phalanx of big toe

A – Plantar flexion, inversion; “push off” during walking

Term
Tibialis Posterior
Definition

 

Posterior Deep Muscle

 

O – Superior tibia and fibula; interosseous membrane

I – Behind medial malleolus and under arch; inserts into tarsals and metatarsals 2-4

A – Foot inversion; plantar flexion; stabilizes medial longitudinal arch

Term
Extensor Digitorum Brevis
Definition

Dorsum of Foot

 

O – Anterior calcaneous; extensor retinaculum

I – Base of proximal phalanx of great toe

A – Extends toes at metarsophalangeal joints

Term

Flexor Digitorum Brevis

 

Definition

Sole of Foot (most superficial)

 

O – Calcaneal tuberosity

I – Middle phalanx of toes 2-4

A – Flex toes

Term
Abductor Hallucis
Definition

Sole of Foot (most superficial)

 

O – Calcaneal tuberosity and flexor retinaculum

I – Proximal phalanx of great toe, medial side, in tendon of flexor hallucis brevis

A – Abducts great toe

Term
Abductor Digiti Minimi
Definition

Sole of Foot (most superficial)

 

O – Calcaneal tuberosity

I – Lateral side of base of little toe’s proximal phalanx

A – Abducts and flexes little toe

Term
Flexor Hallucis Brevis
Definition

Sole of foot (3rd layer)

 

O – Lateral cuneiform and cuboid bones

I – Two tendons on base of proximal phalanx of great toe

A – Flexes great toe’s metatarsophalangeal joint

Term
Flexor Digiti Minimi Brevis
Definition

Sole of Foot (3rd layer)

 

O – 5th metatarsal and tendon sheath of fibularis longus

I – Base of proximal phalanx of toe 5

A – Flexes little toe at metatarsophalangeal joint

Term
Dorsal Interosseus
Definition

Sole of Foot (Deepest, 4th layer)

 

O – sides of metatarsals

I – extensor expansion over 1st phalanx of toes 2-4 on side opposite midaxis of foot and both sides of toe 3

A – abduct (diverge) toes

Term
Plantar Interosseus
Definition

Sole of Foot- Deepest (4th layer)

 

O – the side of each metatarsal that faces the midaxis of the foot

I – extensor expansion on 1st phalanx of each toe (except toe 3) on side facing midaxis of foot

A - adducts toes

Term
Plantarflexion
Definition

Stepping down on a gas pedal

 

The angle between the shin and the top of foot increases from normal flat foot position

Term
Dorsiflexion
Definition

Pointing foot upward

 

The angle between the foot and the shin decreases 

Term
Inversion
Definition

Foot moves inward toward midline

 

ex. Kicking a soccer ball!

Term
Eversion
Definition
The foot moves outward away from midline
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