Leg & ankle

Question 1

Tibilais anterior attachments and actions

Answer 1

Attachments:
lateral condyle and lateral surface of proximal half of tibia, interosseus membrane
medial and inferior surfaces of medial cuneiform and base of 1st metatarsal

Action:
dorsiflexes ankle and inverts foot
Innervation:
deep fibular nerve (L4, L5)

Question 2

Extensor Digitorum Longus attachments and actions

Answer 2

Attachments:
lateral condyle of tibia, medial surface proximal 3/4 of fibula, interosseus membrane
middle and distal phalanges of lateral 4 digits

Action:
extends lateral 4 digits
dorsiflexes foot

Question 3

Fibularis Longus and Brevis attachments and actions

Answer 3

Fibularis longus
head and superior 2/3 lateral surface of fibula
plantar aspect base 1st metatarsal and medial cuneiform

Fibularis brevis
inferior 2/3 lateral surface of fibula
dorsal surface of tuberosity of base of 5th metatarsal

Action
both evert and weakly plantarflex foot

Question 3

Extensor Hallucis Longus attachments and actions

Answer 3

Attachments:
middle part anterior surface of fibula and interosseus membrane
dorsal aspect of base of distal phalanx of 1st digit

Action:
extends 1st digit
dorsiflexes foot

Question 4

Fibularis Tertius attachments and actions

Answer 4

Attachments
inferior third of anterior surface of fibula and interosseus membrane
dorsum of base of 5th metatarsal

Action
dorsiflexes foot
aids in eversion

Question 5

Gastrocnemius attachments and actions

Answer 5

Gastrocnemius
medial head: popliteal surface superior to medial condyle
lateral head: lateral aspect of lateral condyle
attach distally to posterior surface of calcaneus

plantarflex foot, flexes knee

Question 5

Popliteus attachments and actions

Answer 5

Attachments:
lateral surface of lateral condyle of femur, lateral meniscus
post surface of tibia superior to soleal line

Action:
weakly flexes leg at knee, medially rotates tibia if open chain, laterally rotates femur if closed chain (unlock)

Question 6

Plantaris attachments and actions

Answer 6

lateral supracondylar line of femur, oblique popliteal lig.
attach distally to posterior surface of calcaneus

plantarflex foot

Question 7

Soleus attachments and actions

Answer 7

posterior of head of fibula, soleal line of tibia
attach distally to posterior surface of calcaneus

plantarflex foot

Question 8

Flexor Hallucis Longus attachments and actions

Answer 8

Attachments
inferior 2/3 posterior surface of fibula and interosseus membrane
base of 1st distal phalanx

Action:
flexes 1st digit (all joints), weakly plantarflexes foot

Question 8

Tibialis Posterior attachments and actions

Answer 8

Attachments:
posterior tibia inferior to soleal line, posterior interosseous membrane, posterior fibula
navicular tuberosity, plantar aspect of medial cuneiform, cuboid, calcaneus and bases of metatarsals 2-4

Action:
plantarflexes and inverts foot

Question 9

Flexor Digitorum Longus attachments and actions

Answer 9

Attachments:
medial part of posterior surface of tibia
base of 2nd to 5th distal phalanges

Action:
flexes lateral 4 digits, plantarflexes foot