compartment of leg

Question 1



Tibialis anterior

Answer 1

Origin:
Proximal two-thirds of the lateral surface of the tibia and adjacent interosseous membrane
insertion: Medial cuneiform bone and base of 1st metatarsal.
action: 

Extends foot at the ankle joint,
inverts it at the subtalar and transverse tarsal joints.

Question 2

Extensor digitorum longus

Answer 2

Origin:Middle third of anterior surface of fibula and adjacent interos- seous membrane.
insertion:Bases of middle phalanges of lateral four toes.
action:Extends the toes; extends foot at ankle.
.innerevation: Deep fibular nerve

Question 3

fibularis tertius

Answer 3

Origin:Distal quarter of the anterior surface of the fibula.
insertion:Dorsum of the base of the 5th metatarsal.
Actions:Dorsiflexes the foot at the ankle.
.innerevation: Deep fibular nerve
.

Question 4

Extensor hallucis longus

Answer 4

Origin:Middle part of the anterior surface of the fibula, and
adjacent interosseous membrane.
insertion: Base of distal phalanx of hallux
Actions:Extends hallux; dorsiflexes foot
.innerevation: Deep fibular nerve

Question 5



fibularislongus

Answer 5

Origin:
Lateral surface of head and
proximal two-thirds of fibular
shaft, and the intermuscular
septum.
insertion:Lateral side of medial cuneiform and base of 1st metatarsal.
actions;evert foot
innervation:Superficial fibular nerve (L4,5, S1,2).

Question 6

fibularis
brevis

Answer 6

origin:Distal two-thirds of lateral
surface of the fibula, overlapping the lower part of the attachment of peroneus longus.
insertion:Tuberosity on the base of the 5th
metatarsal.
inervation: Superficial (fibular) nerve
(L4,5, S1,2).
action:Everts foot.



Question 7



Gastrocnemius(part of Triceps surae)

Answer 7

(2 heads):
Origin - medial and lateral condyles of femur
Insertion -posterior calcaneus via Achilles tendon

Action: Plantar flexes the foot and flexes the limb at the knee.
nerve:Tibial nerve

Question 8

Soleus(part of Triceps surae)

Answer 8

Soleus
Origin - tibia and fibula
Insertion :posterior calcaneus via Achilles tendon
-

action:
Plantar flexes the foot. In standing it steadies the leg on the foot.
nerve: Tibial nerve
.

Question 9

Plantaris(part of Triceps surae)

Answer 9

Origin - posterior femur
Insertion - posterior calcaneus via Achilles tendon
Action - plantarflex foot, week knee
flexion

innervation: tibial nerve

Question 10



Tibialis posterior

Answer 10

origin:Bifid attachment to the tibia below the soleal line and to the posterior surface of the fibula, also to the interosseous membrane.
insertion:Tuberosity of navicular, ligamentous radiations to other tarsal bones (not talus) and to 2nd, 3rd and 4th metacarpals
innervation: Tibial nerve

action:Inverts and plantar flexes the foot.
.

Question 11

Popliteus

Answer 11

Origin: Lateral surface of the lateral
femoral condyle and to the
posterior convexity of the
lateral meniscus
insertion:Posterior surface of the tibia proximal to the soleal line.
Innervation: Tibial nerve
action:Unlocks the extended leg by
rotating femur laterally on the fixed tibia.

Question 12

Flexor digitorum longus

Answer 12

Origin:Medial part of the posterior
surface of the tibia below the
soleal line and by an apo-
neurosis to the medial crest of the fibula.
insertion:Plantar surface of distal phalanges of lateral four toes.
Innervation: Tibial nerve.
action:
Flexes the distal, middle and
proximal phalanges of the lateral
four toes, and plantar flexes the foot.

Question 13

Flexor hallucis longus

Answer 13

Origin:Posterior surface of fibula and distal third of interosseous
membrane
insertion:Plantar surface of the base of
the distal phalanx of the hallux.
iinervation: Tibial nerve
action:
Flexes the hallux at the inter- phageal and metacarpophalangeal joints, and helps to plantar flex the foot.

Question 14

structures in the medial ankle(from medial to lateral)

.

.

Answer 14

Tibialis Posterior
Flexor Digitorum Longus
Posterior Tibial Artery
Tibial Nerve
Flexor Hallucis Longus
(Tall Dames Are Not Hot)