LE Lecture 20 and 21- Exam 3

Question 1

semitendinosus

Answer 1

P: ischial tuberosity, sacrotuberous ligament
D: pes anserine
N: tibial sciatic L5-S2
A: hip extension, stabilizes pelvis in sagittal plane; knee flexion, IR

Question 2

semimembranosus

Answer 2

P: ischial tuberosity
D: Medial tibial condyle, oblique
popliteal ligament, popliteus fascia
N: tibial sciatic L5-S2
A: hip extension, stabilizes pelvis in sagittal plane; knee flexion, IR

Question 3

biceps femoris long head

Answer 3

P: ischial tuberosity, sacrotuberous ligament
D: head of fibula
N: tibial sciatic L5-S2
A: Hip extension, stabilizes the pelvis in
the sagittal plane; Knee flexion and ER

Question 4

biceps femoris short head

Answer 4

P: lateral lip of linea aspera in middle 1/3 of femur
D: head of fibula
N: common fibular L5-S2
A: knee flexion and ER

Question 5

gastrocnemius

Answer 5

P: Femur (medial head: superior posterior
part of the medial femoral condyle.
lateral head: lateral surface of lateral
femoral condyle)
D: Calcaneal tuberosity viathe calcaneal (Achilles’) tendon
N: Tibial S1-2
A: Talocrural joint: plantar flexion when knee is extended; Knee joint: flexion

Question 6

plantaris

Answer 6

P: lateral epicondly of femur
D: calcaneal tuberosity
N: Tibial S1-2
A: may help in plantar flexion

Question 7

soleus

Answer 7

P: Fibula (head and neck, posterior surface),
tibia (soleal line via a tendinous arch)
D: Calcaneal tuberosity via the calcaneal (Achilles’) tendon
N: tibial S1-2
A: Talocrural joint: plantar flexion

Question 8

popliteus

Answer 8

P: Lateral femoral condyle, posterior
horn of the lateral meniscus
D: Posterior tibial surface
N: Tibial L4-S1
A: Knee joint: flexes and unlocks the knee by externally rotating the femur on the fixed tibia

Question 9

flexor hallucis longus

Answer 9

P: Fibula (distal two thirds of posterior
surface), interosseous membrane
D: base of 1st distal phalanx
N: Tibial L5-S2
A: Talocrural joint: plantar flexion; Subtalar joint: inversion (supination); MTP and IP joints of the 1st toe: plantar flexion; Supports the medial longitudinal arch

Question 10

flexor digitorum longus

Answer 10

P: Tibia (middle third of posterior surface)
D: bases of 2nd-5th distal phalanx
N: Tibial L5-S2
A: Talocrural joint: plantar flexion; Subtalar joint: inversion (supination); MTP and IP joints of the 2nd to 5th toes: plantar flexion

Question 11

tibialis posterior

Answer 11

P: Interosseous membrane, borders of tibia and fibula
D: Navicular tuberosity; cuneiforms (medial, intermediate, and lateral); 2nd to 4th metatarsal bases
N: Tibial L4-5
A: Talocrural joint: plantar flexion; Subtalar joint: inversion (supination); Supports the longitudinal and transverse arches

Question 12

fibularis longus

Answer 12

P: Fibula (head and proximal two thirds of the lateral surface), intermuscular septa
D: Medial cuneiform (plantar side), 1st metatarsal base
N: superficial fibular L5-S1
A: Talocrural joint: plantar flexion; Subtalar joint: eversion (pronation); Supports the transverse arch of the foot

Question 13

fibularis brevis

Answer 13

P: Fibula (distal half of the lateral surface),
intermuscular septa
D: tuberosity at base of 5th metatarsal
N: superficial L5-S1
A: Talocrural joint: plantar flexion; Subtalar joint: eversion (pronation)