Flashcards in 03 Final Exam Study Guide 4 Deck (42)
Which ligaments restrain motion during plantarflexion?
- anterior half of deltoid ligament
- anterior tib-fib ligament
- anterior aspect of capsule
- anterior elements of medial and lateral ligaments
- calcaneofibular ligament
Which ligaments restrain motion during dorsiflexion?
- posterior aspect of capsule
- posterior elements of medial and lateral ligaments
- posterior half of deltoid ligament
- posterior tibiofibular ligament
- posteiror talofib
- calcaneal ligament
Which ligaments limit medial motion?
Which ligaments limit lateral motion?
foot sliding forward is called
Which structures limit anterior translation of the ankle?
structures on the anterior ankle
Which structures limit posterior translation of the ankle?
structures on the posterior ankle
How do we divid the talus?
anterior and posterior half
posterior half of the talus
trochlea and body
What does the posterior half of the talus connect to?
distal tibiofibular ligament
anterior half of the talus
neck and head
What does the anterior portion of the talus connect to?
gives connection to the foot itself
Where do inversion and eversion occur?
at the subtalar joint
what are the tarsals?
- 3 cuneiforms
What is the midline of the foot?
2nd metatarsal (ray)
rigidity/flexibility of the rays
- medial 2 are rigid
- lateral 3 are flexible
dynamic restraints of medial longitudinal arch
3 main ones
- peroneus longus
- tibialis anterior
- tibialis posterior
How do dynamic restraints of medial longitudinal arch function?
create a buttress at the apex of the arch
What is under constant tension during the gait cycle?
springs (supporting structures)
What happens to the springs and the arch during the WB part of the gait cycle?
- medial arch flattens out
- "spring" lengthens
2 types of pes plantis
rigid pes plantis
decreased arch height in WB and NWB
flexible pes plantis
decreased arch height during WB
plane of motion of the foot: plantarflexion/dorsiflexion
plane of motion of the foot: inversion/eversion
plane of motion of the foot: abduction/adduction
transverse plane on vertical axis
Anterior structures are dorsiflexors and posterior structures are plantarflexors if you draw a line through these structures
straight line through medial and lateral malleolus
medial muscles of the lower leg are _____
lateral muscles of the lower leg are ______
What happens to the structures during an inversion sprain?
- everters and lateral ligaments are stretched
- everters contract after the ligaments start to give way
Which are the dynamic restraints of ankle inversion?
What is an indication that you may have a grade 3 or severe inversion sprain?
lateral leg pain
3 muscles of the lower leg that cross the knee
tibialis posterior: distal attachments
- all tarsals minus talus and calcaneus
- all metatarsals except the first one
peroneus tertius is in a compartment with the
extensor digitorum longus
Which of the peroneus muscles are plantarflexors and which are dorsiflexors
- longus and brevis are plantarflexors
- tertius is dorsiflexor
In addition to plantarflexion and (pronation?), what else does the peroneus longus do with respect to the arch?
dynamic restraint of medial longitudinal arch
Lis Franc fracture
- fx at either the base of the first or second metatarsal and/or a ligament rupture
What is the Lis Franc ligament?
thick, powerful structure at the tarsometatarsal joint that connects the 5 metatarsals
Where is the Lis Franc ligament the most powerful?
at first 2 rays