Flashcards in Musculature of the Leg and Dorsum of the Foot Deck (53):
1
muscles of anterior crural compartment and dorsum of the foot?
tibialis anterior
extensor digitorum longus
flbularis tertius
extensor hallucis longus
extensor digitorum brevis (only muscle on dorsum)
2
lateral crural ligaments?
fibularis longus
fibularis brevis
3
attachments of tibialis anterior?
origin:
lateral surface of most of tibia and interosseous membrane
insertion:
medial cuneiform and base of first metatarsal
to bottom of foot***
4
talus has how many articulating surfaces?
3
5
action of tibialis anterior?
dorsiflex and invert foot
POWERFUL INVERTER OF FOOT**
6
innervation of tibialis anterior?
deep fibular nerve
7
attachments of extensor digitorum longus?
origin:
most of anterior surface of fibula and interosseous membrane
insertion:
middle and distal phalanges of four lesser digits
8
action of extensor digitorum longus?
extends toes, dorsiflexes foot
**has fibular tertius
9
innervation of extensor digitorum longus?
deep fibular nerve
10
sustentaculum tali
on calcaneus
maintains talus superiorly
allows for arch
11
how many compartments in leg?
4
anterior and posterior intermuscular septa
transverse intermuscular septa
12
extensor retinaculum?
super and inferior
-over extensors of foot
13
lateral retinaculum?
fibular
14
medial retinaculum?
lateral side of foot
15
muscles of anterior crural compartment?
tibialis anterior
extensor digitorum longus
extensor hallucis longus
fibularis tertius
16
attachment of fibularis tertius
origin:
distal anterior surface of fibula (continuation of extensor digitorum longus)
insertion:
base of 5th metatarsal
-on top of foot***
17
action of fibularis tertius
aids in eversion and dorsiflexion
18
innervation of fibularis tertius?
deep fibular nerve
19
attachments of extensor hallucis longus?
origin:
mid-portion of fibula, deep to tibialis anterior and extensor digitorum
insertion:
base of distal phalanx of great toe (Hallux)
20
action of extensor hallucis longus?
extends great toe, dorsiflexes foot
21
innervation of extensor hallucis longus?
deep fibular nerve
22
attachment of extensor digitorum brevis?
**only muscle on dorsum of foot
-has extensor hallucis brevis component - to digit 1
origin:
dorsal surface of calcaneus
insertion:
base of proximal phalanx of great toe and proximal phalanges of toes 2,3 and 4 which attach in concert with tendons of extensor digitorum longus
23
action of extensor digitorum brevis?
extend toes 1,2,3,4
24
innervation of extensor digitorum brevis?
deep fibular nerve
25
muscles of lateral crural compartments
everters
flbularis longus
fibularis brevis
26
attachment of fibularis longus?
origin:
upper lateral two thirds of fibula
insertion:
first metatarsal and medial cuneiform
-to bottom of foot
27
action of fibularis longus?
everts and plantar flexes foot
to medial cuneiform**
-acts with antagonist tibialias anterior for eversion/inversion stability when walking
28
innervation of fibularis longus?
superficial fibular nerve
29
attachments of fibularis brevis
origin:
distal lateral fibula
insertion:
base of fifth metatarsal
30
action of fibularis brevis
everts and plantar flexes the foot
31
innervation of fibular brevis
superficial fibular nerve
32
muscles of posterior crural compartment?
superficial layer:
gastrocnemius
soleus
plantaris
deep layer:
popliteus
flexor digitorum longus
flexor hallucis longus
tibialis posterior
33
attachments of gastrocnemius
origin:
posterior surfaces of roughened area of lateral and medial femoral condyles
insertion:
calcaneus in common with soleus and plantaris muscles (achilles tendon)
34
action of gastrocnemius
plantar flexes foot, flexes leg
more in running**
35
innervation of gastrocnemius
tibial nerve
36
triceps serae?
gastrocnemius
soleus
plantaris
37
attachments of soleus
origin:
posterior surface of head and proximal shaft of fibula, soleal line on upper portion of tibia
insertion:
calcaneus with grastrocnemius and plantaris muscle
38
action of soleus?
plantar flexes foot
more in jumping**
-bc its below the knee no leg flexion only plantar flexion
39
innervation of soleus?
tibial nerve
40
attachments of the plantaris?
origin:
posterior surface of lateral femoral condyle
insertion:
calcaneus with gastrocnemius and soleus
41
action of plantaris?
weakly plantar flex foot and flex leg
42
innervation of plantaris?
tibial nerve
43
attachments of popliteus?
origin:
lateral surface of lateral condyle of femur
insertion:
proximal tibia above soleal line
44
action of popliteus?
flexes and medially rotates leg
when foot is fixed, lateral rotates femur to unlock knee joint as leg flexion proceeds***
45
innervation of popliteus?
tibial nerve
46
achilles tendons
triceps serae
47
attachments of flexor digitorum longus?
origin:
posterior surface, mid portion of tibia
insertion:
base of distal phalanx of four small toes
48
action of flexor digitorum longus?
flexes four small toes, plantar flexes foot
49
innervation of flexor digitorum longus?
tibial nerve
50
attachments of tibialis posterior?
origin:
posterior surface of upper portion of tibia, fibula and intervening interosseous membrane
insertion:
plantar surface of metatarsals 2,3,4, navicular, medial cuneiform mainly, but also to ALL other tarsals except talus
51
action of tibialis posterior?
inverts and plantar flexes foot
52
innervation of tibialis posterior?
tibial nerve
53