knee

Question 1

what is the function, origin and insertion of the tibialis anterior

Answer 1

function - dorsiflexion/IR of the foot
origin - lateral condyle and proximal lateral shaft of tibia
insertion - base of metatarsal 1 and medial cuneiform

Question 2

what is the function, origin and insertion of the extensor hallucis longus

Answer 2

function - assists in ankle, foot and digit 1 (toe) extension movement
origin - anterior surface of the fibula and adjacent anterior interosseous membrane
insertion - dorsal surface of the distal phalanx of digit 1 (big toe)

Question 3

what is the function, origin and insertion of the Extensor digitorum longus

Answer 3

function - extension of digits 2-5, dorsiflexion and ER of foot at the ankle joint
origin - lateral condyle of the tibia, upper three-fourths of anterior fibula shaft and the interosseous membrane
insertion - distal phalanges of digits 2-5

Question 4

what is the function, origin and insertion of the soleus (tricep surae)

Answer 4

function - plantar flexion of the foot
origin - posterior surface of the head and upper third of the fibula shaft
insertion - posterior surface of the calcaneus by way of the Achilles tendon

Question 5

what is the function, origin and insertion of the gastrocnemius

Answer 5

function - flexes leg at the knee joint/ plantar flexion of the foot
origin - medial and lateral heads of arise from the posterior surfaces of femoral condyles
insertion - posterior surface of the calcaneus by way of the Achilles tendon

Question 6

what is the function, origin and insertion of the plantaris

Answer 6

function - flexion of the lower leg at the knee joint, plantarflexion at the foot at the ankle joint
origin - above the lateral head of the gastrocnemius on the lower part of the supracondylar ridge of the femur
insertion - posterior part of the calcaneus, along w the Achilles tendon

Question 7

what is the function, origin and insertion of the popliteus

Answer 7

function - medial internal rotation of the lower leg, flexion of the lower leg (unlocks knee)
origin - lateral surface of the lateral condyle of the femur
insertion - posterior surface of the proximal tibial shaft

Question 8

what is the function, origin and insertion of the Flexor hallucis longus

Answer 8

function - ankle/foot/big toe movement, flexion of distal phalanx, IR and plantarflexion of foot at the ankle joint
origin - inferior two thirsds of the posterior fibula and inferior interosseous membrane
insertion - inferior distal phalanx of digit 1

Question 9

what is the function, origin and insertion of the Flexor digitorum longus

Answer 9

function - flexion of phalanges in the distal joints of 2-5, IR and plantar flexion at the ankle joint
origin - posterior surface of the tibia
insertion - inferior surfaces of the distal phalanges of digits 2-5

Question 10

what is the function, origin and insertion of the tibialis posterior

Answer 10

function - plantarflexion of foot, inverts and adducts foot
origin - interosseous membrane, posterior surface of tibia, and superior two-thirds of the medial surface of the fibula
insertion - tuberosity on navicular bone and slips to cuneiforms (3), cuboid, and metatarsals 2-4

Question 11

what is the function, origin and insertion of the fibularis longus

Answer 11

function- ER, and plantarflexion at the ankle joint, helps support the transverse arch of the joint
origin - interosseous membrane, posterior surface of the tibia and the head and upper two thirds of the lateral surface of the fibula
insertion - base of metatarsal 1

Question 12

what is the function, origin and insertion of the Fibularis brevis

Answer 12

function - ER, pronation, and plantarflexion of foot at the ankle joint
origin - lateral margin of the distal two thirds of the fibula and the adjacent intermuscular septum
insertion- tuberosity on the lateral side of metatarsal 5