leg and ankle joint Flashcards
4 compartments to leg
anterior
lateral
superficial posterior
deep posterior
between anterior compartment and deep posterior compartment is
interosseous membrane
between anterior compartment and lateral compartment is
intermuscualar septum
anterior compartment (4)
tibias anterior
extensor hallucis longus
extensor digitorum longus
fibulas tertius
anterior compartment
dorsiflexors
deep fibular nerve (common fibular nerve)
anterior tibial artery
dorsiflexors
inn: Deep fibular nerve
branches of common fibular nerve
blood: anterior tibial artery
trials anterior
I: medial cuneiform and metatarsal 1
action: dorsiflex , inversion
extensor hallucis longus
I: digit 1 or great toe
action: dorsiflex
extensor digitorum longus
digits 2-5 or digital phalanx
fibulas tertius
I: base of the 5th metatarsal
Action: dorsiflex, eversion
fibulas tertius
13% of FT muscles are missed in clinical tests
on aver the clinical studies show a prevalence of 80%
which nerve goes to the anterior compartment
deep fibular nerve
wich nerve goes to the lateral compartment
superficial fibular nerve
blood supplies to anterior compartment
anterior tibial artery
deep fibular nerve - lateral terminal branch innervates
extensor hallucis brevis
superficial fibular nerve becoming
dorsal digital nerves
shin splints
overdue resulting in trauma of tibia’s anterior due to small tears in periosteum
damage to deep fibular nerve may result to?
weak dorsiflexion / drop foot
lateral compartment
fibulas longus
fibulas brevis
lateral compartment
plantar flexion
eversion
superficial fibular nerve
fibular artery
medial sural branches of
tibial nerve
lateral sural branches of
common fibular nerve
lateral compartment blood supply
Fibular artery
fibular artery for lateral compartment
branch of PTA
branches off just inferior to popliteus
descends along flexor hallucinations longus
sends perforating branches to the lateral compartment
posterior compartment (superficial and deep)
plantar flexion
tibial nerve
PTA
superficial posterior compartment
all insert on the calcanea tuberosity via the tendoncalcaneous achilles
superficial compare (3)
gastrocnemius
soleus
plantaris
gastrocnemius
medial and lateral condyles of femur
contributes to knee flexion and plantar flexion
soleus
soleal line of the tibia and head of the femur
plantirs
lateral femoral epicondyle
absent in 5-20% of population
mechanism of injury to calcanea tendon
sudden, unexpected or violent dorsiflexion of the foot while in plantar flexion
sudden forced plantar flexion
individuals who don’t exercise regularly
what runs through the tendinous arch of soleus
tibial nerve
popliteal Artery and vein
in rare occurrences the tibial nerve can be compressed by the tendinous arch. what signs might this patient have?
weak plantar flexion
week foot intrinsics
deep posterior compartment
tibialis posterior
flexor hallucis longus
flexor digitorum longus
tibiliais posterior
O: interosseous membrane and borders of tibia and fibula
I: navicular tuberosity, cuneiforms, 2-4 metatarsals
contributes to inversion, works with tibial artery
flexor digitorum longus
O: posterior middle third of tibia
I: phalanges 2-5
brintubutes to inversion
flexor hallucis longus
O: Posterior fibular and interosseous membrane
I: digit 1, distal phalanx (may act with triceps sure in plantar flexion)
superficial posterior compartment innervation
S1 and S2
Deep compartment innervation
L4- S2
posterior compartment blood supply
tibial artery and fibular artery
posterior tibial artery passes through the
tarsal tunnel
keystone of the foot that takes the weight of your body
talus
the ankle joint (ankle mortise)
a recess cut into a part, designed to receive a corresponding projection ( a tendon) to join or lock the parts together
ankle joints
tibiofibular syndesmosis
talocurural
subtalar joint
tibiofibular syndesmosis
between tibia and fibula
interosseous membrane
talocural - true ankle joint
hinge joint - dorsiflexion and plantar flexion
subtalar joint
talus and calcaneus
inversion and eversion of foot
movements of the ankle joint
plantar/dosiflexion
inversion/eversion
adduction/abduction
supination
plantar flexion, inversion, adduction
pronation
dorsiflexion, eversion, abduction
ligaments of the ankle joint (tibiofibular)
fibrous joint / syndesmosis (continuation of IOM)
anterior and posterior tibiofibular ligaments
fibers course in same direction as the IOM to increase stability
lateral ligament of talocrural
anterior talofibular lig
posterior talofibular lig
calcaneofibular ligament
medial ligament of talocrural
Posterior tibiotalar
anterior tibiotalar
tibionavicular
tibiocalcaneal
blood supply to the ankle joint
Dorsalis pedis artery
(branches of fibular, anterior tibial and posterior tibial arteries)
ankle sprains happen during
inversion
plantar flexion
70-80% bball players got sprain
most likely torn portion is the
talofibular ligament followed next by the calcaneofibular ligament
TF fractures
eversion
fibular feature with excessive
inversion of foot