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Gross Anatomy: Unit Four. > Anterior And Lateral Leg, Dorsum Of Foot > Flashcards

Anterior And Lateral Leg, Dorsum Of Foot Flashcards

0
Q

Tibialis anterior insertion

A

Medial and inferior surfaces of medial cuneiform

Base of the 1st metatarsal

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1
Q

Tibialis anterior origin

A
  • Lateral condyle of tibia

- superior two thirds of lateral surface of tibia and interosseous membrane

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2
Q

Innervation for all muscles of the anterior leg

A

Deep fibular nerve

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3
Q

Tibialis anterior action

A

Dorsiflexes ankle

Inverts foot

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4
Q

Extensor hallucis longus origin

A

Middle part of anterior surface of fibula and interosseous membrane

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5
Q

Extensor hallucis longus insertion

A

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

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6
Q

Extensor hallicus longus action

A

Extends big toe, dorsi flexes ankle

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7
Q

Extensor digitorum longus origin

A
  • Lateral condyle of tibia

- Superior two thirds of anterior surface of fibula and interosseous membrane

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8
Q

Extensor digitorum longus insertion

A

Middle and distal phalanges of lateral four digits

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9
Q

Extensor digitorum action

A

Extends lateral four digits

Dorsiflexes ankle

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10
Q

Fibularis tertius origin

A

Inferior third of anterior surface of fibula and interosseous membrane

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11
Q

Fibularis tertius insertion

A

Dorsum of base of 5th metatarsal

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12
Q

Fibularis tertius action

A

Dorsi flexes ankle

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13
Q

What is the common action for the anterior leg muscles

A

Dorsi flexes ankle

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14
Q

Fibularis longus origin

A

Head and superior two thirds of lateral surface of fibula

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15
Q

Fibularis longus insertion

A

Base of first metatarsal and medial cuneiform

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16
Q

Common innervation for the lateral compartment of the leg

A

Superior fibular nerve

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17
Q

Common action for the muscles of the lateral compartment of the leg

A

Evert foot

Weakly planterflex ankle

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18
Q

Fibularis brevis origin

A

Middle part of lateral surface of fibula

19
Q

Fibularis brevis insertion

A

Dorsal surface of tuberosity of base of 5th metatarsal

20
Q

retinacula

A
  • bound the anterior compartment of the leg inferiorly
  • two bands of deep fascia that help to bind the muscle tendons
  • preventing the tendons from bow-stringing

(Just like the retinaculum of the wrist)

22
Q

superior extensor retinaculum

A
  • boundary of the anterior compartment of the leg
  • runs from fibula to tibia
  • strong
23
Q

inferior extensor retinaculum

A
  • “Y” shaped
  • boundary of the anterior compartment of the leg
  • forms a strong loop around the tendons of fibularis tartius and extensor digitorum longus
24
Q

extensor digitorum brevis (EBD) and extensor hallucis brevis (EHB)

A
  • EHB is a part of EBD
  • forms a mass on the lateral part of the dorsum of the foot
  • they aid Extensor digitorum and extensor hallucis longus in extending digitis 1-4
  • inntervated by deep fibular nerve
25
Q

Deep femoral nerve

A
  • one of the two terminal branches of common fibular nerve
  • supplies the anterior compartment
  • runs with anterior tibial artery
26
Q

anterior tibial artery

A
  • branch of the popliteal artery

- when it enters the ankle it then becomes dorsalis pedis artery

27
Q

what muscles are in the lateral compartment of the leg

A

fibularis longus

fibularis brevis

28
Q

superior fibular nerve

A
  • 2nd terminal branch of the common fibular nerve

- after they supply the two muscles of the lateral compartment it continues as a cutaneus nerve

29
Q

footdrop

A

injury to the common fibular nerve

30
Q

ankle joint

A
  • hinge synovial
  • talocrual articulation
  • tibia/fibula with tarus
31
Q

malleolar mortise (deep socket)

A
  • the distal end of the tibia and fibula form this

- the pulley shaped trochlea of the talus fits into here

32
Q

what helps stablize the ankle joint from being spread apart

A

-strong interosseous tibiofibular ligament

along with anterior and posterior tibiofibular ligaments

33
Q

what reinforces the ankle joint laterally

A

lateral ligament of the ankle (three seperate ligaments make this up)

34
Q

anterior talofibular ligament

A
  • part of the lateral ligament of the ankle
  • flat, weak
  • lateral malleolus to neck of the talus
35
Q

posterior talofibular ligament

A
  • part of the lateral ligament of the ankle
  • thick, fairly strong
  • runs from the malleolar fossa of fibula to lateral tubercule of the talus
36
Q

calcaneofibular ligament

A
  • part of the lateral ligament of the ankle

- tip of the lateral malleolus to the lateral surface of the calcaneus

37
Q

what reinforces the ankle joint medially

A

-Medial ligament of the ankle (Deltoid Ligament)

38
Q

Medial ligament of the ankle (Deltoid ligament)

A
  • large, strong

- runs from medial malleolus then fans to attach to the talus, calcaneus and navicular (has four part)

39
Q

What are the four parts of the deltoid ligament?

A

-tibionavicular, tibiocalcaneal, anterior and posterior tibiotalar

40
Q

what are the movements of the ankle joint

A
  • dorsiflexion
  • plantarflexion (wobble as well, which is abduction, adduction, inversion, eversion)

(these movements occur during plantarflexion due to the weakness in the joint during that motion)

41
Q

plantarflexion

A

muscles in the posterior and lateral compartment of the leg

42
Q

dorsiflexion

A

-mainly done by the anterior compartment of the leg

43
Q

what are the four muscles of the anterior leg

A

tibialis anterior
extensor digitorum longus
extensor hallucis longus
fibularis tertius

44
Q

What formed the leg?

A

Anterior and posterior intermuscular septum, interosseous membrane, two leg bones

45
Q

What is the intermuscular septum

A

Continuation of deep fascia of the leg, that projects in to help to seperate the compartment of the leg.

(Anterior and posterior to seperate the three compartments)
(The transverse separates the deep and superficial posterior compartments)

46
Q

What are the three compartment of the thigh

A

Posterior
Anterior
Medial

47
Q

What are the three muscles of the leg

A

Anterior
Posterior
Lateral

Gross Anatomy: Unit Four. (11 decks)

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