Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/38

Click to flip

38 Cards in this Set

  • Front
  • Back
what are the 3 major muscle groups of the leg
1. anterior crural
2. lateral crural
3. posterior crural
what is the crural fascia
the continuous connective tissue that separates the muscles into compartments.
what is the most common cause of a sprained ankle
forceful inversion of the foot
what is the major function of the anterior crural muscles
major dorsiflexors of the foot and extensors of the toes
what are the 4 anterior muscles of the leg
1. tibialis anterior(tom)
2. extensor digitorum longus(dick)
3. extensor hallucis longus(harry)
4. peroneus tertius
what nerve innervates all four muscles
the deep fibular (peroneal) nerve
what is the origin/insertion of the tibialis anterior
origin=lateral condyle and upper tibia

insertion=medial surface of 1st cuneiform and metatarsal
what is the origin/insertion of the extensor digitorum longus
origin=lateral condyle of tibia, anterior fibula

insertion=dorsal surface and middle and distal phalanges
what is the origin/insertion of the extensor hallucis longis
origin=anterior middle fibula

insertion=base of distal phalanx of hallus
what is the origin insertion of the peroneus tertius
the lower third of medial fibula

insertion=base of 5th metatarsal
what is the action of tibialis anterior
dorsiflex and invert foot
what is the action of extensor dig. longus
dorsiflex foot and extend digits
what is action of extensor hallucis longus
dorsiflex and invert foot, extend hallux
what is the action of the peroneus tertius
dorsiflex and evert foot
what are shin splints
small tears in the periosteum attachment between tibialis anterior and tibia
what is the major action of the lateral crural muscles
plantar flex and evertors of the foot
what are the two muscles of the lateral crural group
1. fibularis (peroneus longus)
2. fibularis (peroneus) brevis
what is the innervation of the lateral crural muscles
the superficial fibular (peroneal)nerve
what is the insertion of both lateral crural muscles? (same as the tibialis anterior)
the base of the 5th metatarsal
what is the origin of the lateral crural muscles
fibularis longus=head and upper fibula

fibularis brevis=lower fibula
what is the major action of the posterior crural leg muscles
flex leg and plantar flex foot
what are the three superficial muscles in the posterior crural muscle group
1. gastrocnemius
2. soleus
3. plantaris
what is the innervation for the three superficial posterior crural muscles
the tibial nerve
which muscle does not cross the knee joint therefore can not flex the leg
soleus
what is the origin/insertion of the gastrocnemius
origin=medial and lateral condyles of femur

insertion=calcaneal tendon into calcaneus

insertion
what is the origin/insertion of the soleus
origin=upper fibula and soleal line

insertion=calcaneus via calcaneal tendon
what is the origin/insertion of the plantaris
origin=posterior femur above lateral condyle

insertion=posterior calcaneus
what muscle in the posterior crural group is commonly injuured while skiing
the plantaris
what is the largest tendon in the body
the calcaneal tendon
what is the major action of the deep posterior crural muscles
plantar flex and invert the foot
what are the 4 muscles of the deep posterior crural group
1.popliteus
2.flexor hallucis longus
3.flexor digitorum longus
4.tibialis posterior
what innervates the muscles in the deep posterior crural group
the tibial nerve
what is the origin/insertion of the popliteus
origin=lateral condyle of femur

insertion=above soleal line
what is the origin/insertion of the flexor hallucis longus
origin=lower fibula

insertion=base of disatal phalax of hallux
what is the origin/insertion of the flexor digitorum longus
origin=posterior tibia

insertion=base of distal phalanx of digits
what is the origin/insertion of the tibialis anterior
origin=posterior tibia and fibula

insertion=tarsal and metatarsals
which muscle unlocks the knee so that flexion can begin
the popliteus
what is unique about positioning of the flexor hallucis longus
it is the most lateral but flexes the most medial digit (hallux)