ANATOMY
21
11.
Lateral compartment of leg
(P582 to 585 and 577tbl Moore, p 645, 640 NM)
a.
Weak dorsiflexors
F - Weak plantar flexion NM p 642 – mainly everts
b.
Go over peroneal trochlea
F - Don’t even know what the fuck they are talking about
c.
Longus, brevis, deep peroneal nerve all in same
Compartment
F - FL, FB and SUPERIFICIAL Fib N in lateral compartment p585 Moore
d.
contains peroneus longus, brevis and tertius
F - tertius in ant compartment
e.
the muscles are supplied by the deep fibular nerve
F - supplies ant leg muscles, dorsum of foot and skin of first interdigital cleft
f.
the fibularis longus muscle arises only from the fibula
T - origin head of fibular, insertion base of 1
st
metatarsal and medial cuniform
g.
the fibular muscle tendons are bound at the lateral
malleolus by the inferior peroneal retinaculum
F - tendons of fibularis longus and brevis are bound down at the
malleolus by the SUPERIOR fibular retinaculum
h.
the fibular muscle tendons share a common synovial
sheath at the lateral malleolus
T - but not the best answer as sheath encloses all of fibularis longus and brevis
i.
fibularis longus helps steady the leg on the foot when a
person stands on one leg
T - “when a person stands on one leg fibularis longus helps steady
the leg on the foot”
j.
contains the deep peroneal nerve
F – superficial
k.
peroneus longus grooves the bone
F - lies superficial to brevis, so brevis grooves the bone
l.
brevis goes above trochanter on lateral surface
of calcaneum
T - LASTS 191
m.
PB and PL run in the same synovial sheath
under the inferior retinaculum
T - Bounded by superior and inf fibular retinaculum
n.
brevis goes above the lateral malleolus
F - inferior to it
o.
the muscles are supplied by the deep peroneal nerve
F – Superificial
p.
contains peroneus longus/brevis and deep peroneal nerve F - contains superficial fibular nerve
q.
Fibularis longus grooves lateral malleolus
F - brevis does since it is close to the bone but longus runs above it
r.
Fib. Brevis goes over trochlear
T - and longus goes UNDER it
s.
Fibularis longus only attaches to fibula
T - head and superior 2/3rds
t.
Fibularis longus and brevis share common synovial sheath F - They do above the superior fibular retinaculum and then they divide
u.
the peroneus longus arises only from the fibula
T - both longus and brevis only arise from the fibula
v.
the blood supply is anterior tibial
F - Sort of perforators from anterior tibial AND from fibular artery
(but doesn’t run in lateral compartment)
w.
peroneal muscle tendons share same muscle sheath
at the lateral malleolus
F - Split at the fibular retinaculum
x.
peroneal muscle tendons are bound at the
lateral malleolus by the inferior peroneal retinaculum
F - The peroneal muscle tendons do go in a common sheath and
are bounded by the inferior peritoneal retinaculum but I think it is
further inferior to the lateral malleolus at the fibular trochlea
12.
Which muscle inserts into both the tibia and fibula p 577 Moore
a.
tibialis anterior
F – from fibula and IO membrane
b.
tibialis posterior p 589 Moore
T - p637, 649 Moore
c.
Extensor digitorum longus
T
d.
Flexor digitorum longus
F – fibula and IO membrane
e.
Peroneus
F
f.
Extensor hallicus longus
F – from fibula and IO membrane
13.
What muscle causes dorsiflexion and inversion of the ankle
a.
tibialis anterior
T - p640NM
b.
tibialis posterior
F - plantar flexion and inversion
c.
extensor hallucis longus
F - Dorsiflexion of great toe and dorsiflexion
d.
peroneus tertius
F - dorsiflexion and eversion
14.
Which muscle causes inversion of the foot? 577 589 moore
a.
TA
T - DF + inv
b.
Peroneus tertius
F - DF + Ever
c.
TP
T - plantar flex + inv
d.
Peroneus Brevis
F - evert + PF
e.
EHB
F - Flex toe