lecture 13 musculature - exam 3

Question 1

extrinsic muscles:
______ attachments in the leg
____ compartments in the LE (___/____/____)

Answer 1

proximal
3 (ant/lat/post)

Question 2

intrinsic muscles:
both _____ and ______ attachments in the foot

Answer 2

proximal and distal

Question 3

common fibular (peroneal) nerve:

Answer 3

L4-S2
deep (ant) and superficial (lateral) branches
sensory common and superficial/deep differences
injury can include foot drop

Question 4

tibial nerve:

Answer 4

L4-S3
innervate all other extrinsic and intrinsic muscles (posterior)

Question 5

what muscles dorsiflex and invert?

Answer 5

extensor hallucis longus
tibialis anterior

Question 6

what muscles dorsiflex and evert?

Answer 6

extensor digitorum longus
fibularis tertius

Question 7

what muscles plantarflex and invert?

Answer 7

tibialis posterior
flexor digitorum longus
flexor hallucis longus
achilles tendon

Question 8

what muscles plantarflex and evert?

Answer 8

fibularis brevis
fibularis longus

Question 9

recognize posterior tib, fibularis longus & brevis, anterior tib, and flexor hallucis longus (slide 51 picture)
what do they all have an influence on?

Answer 9

first ray/medial arch control

Question 10

palpate the fibularis brevis and longus behind the ______ malleoli

Answer 10

lateral

Question 11

palpate the ant. tib, post. tib and flexor hallucis longus behind the _____ malleoli

Answer 11

medial

Question 12

intrinsic muscles:
dorsum: 1 layer =

Answer 12

extensor digitorum brevis

Question 13

intrinsic muscles of plantar layer 1:

Answer 13

flexor digitorum brevis
abductor hallucis
abductor digiti minimi

Question 14

intrinsic muscles of plantar layer 2:

Answer 14

quadratus plantae
lumbricals

Question 15

intrinsic muscles of plantar layer 3:

Answer 15

flexor hallucis brevis
flexor digiti minimi brevis
adductor hallucis

Question 16

intrinsic muscles of plantar layer 4:

Answer 16

plantar interossei
dorsal interossei

Question 17

what tendons run in the 3rd and 4th layers of the foot?

Answer 17

fibularis brevis
fibularis longus
long plantar ligament
tibialis posterior

Question 18

what tendons run in the 2nd layer of the foot?

Answer 18

flexor hallucis longus
flexor digitorum longus

Question 19

how does a normal soleus affect the position and stability of the knee?

Answer 19

causes the ankle to PF
PF rotates the leg posteriorly, bringing the knee to ext
contraction of hip extensor muscle helps to extend the knee by pulling the femur posteriorly

Question 20

how does a weakened soleus muscle affect the position and stability of the knee?

Answer 20

unable to decelerate ankle DF
DF occurs as a forward rotation of the leg over the talus
forward position shifts the force of BW post. to knee causing it to buckle