Exam IV Flashcards
3 divisions of the foot
- forefoot
- midfoot
- hindfoot
Bones of the foot
- Talus
- Calcaneus
- Navicular
- Cuboid
- cuneiforms
- Sesamoid (2)
Fcns of the arches
- assist in supporting the body
- Absorb shock
- Provide space for vessels/nerves/muscles to pass
Interlongitudinal arch
serves for mov’t
-originates along medial border of the calcaneus and extends forward to dist. head of 1st meta tarsal
-Calcaneus->talus->navicular->1st cunieform-> 1st metatarsal
Main supporting ligament = plantarcalcaneonavicular
Outerlogitudinal arch
serves for support
- lat aspect of the foot
- Calcaneus -> cuboid -> 5th metatarsal
- much lower and less flexible than inner arch*
Ant. Metatarsal Arch
Shaped by distal heads of metatarsals
Transverse arch
extends across trans tarsal bones, primarily cuboid/cuneiform
-forms 1/2 dome which gives protection to soft tissue and increase mobility
4 arches of the foot
- Interlogitudinal
- Outerlongitudinal
- Ant. Metatarsal Arch
- Transverse Arch
Fibula
non weight bearing
- distal portion = lat. mallelous
- extends entire length of talus
Tibia
primary weight bearing bone
- dist. portion = med malleolous
- extends 1/3 length of the talus
Ligaments (Lateral Aspect) of ankle
- Ant. tibiofibular
- Post. tibiofibular
- Ant. talofibular
- Calcaneofibular
- Post. talofibular
Ligaments involved in a “high” ankle sprain
- Ant tibiofibular
2. Post tibiofibular
3 most common ligaments sprained (ankle)
- Ant talofibular
- Post talofibluar
- calcaneofibular
Medial ligaments of ankle
- Detoild ligaments
- 3 aspects/portions
4 compartments of the lower leg
- Ant. compartment
- Lat compartment
- Superficial Post Compartment
- Deep Post Compartment
Muscles of Ant Compartment of lower leg
- Tibialis ant
- Extensor Hallicus Longus
- Extensor Digitorum Longus
Actions of Tibialis Ant.
- Dorsi flex
2. invert
Actions of Extensor Hallicus Longus
- Dorsi Flex
2. Extend big toe
Actions of Extensor digitorum longus
- dorsi flex
2. extend toes
Muscles of the Lat Compartment of Lower leg (Peroneal Retinaculum)
- Peroneus Longus
- Peroneus Brevis
- Preoneus Tertius
Actions of the Peroneus Longus
- eversion
2. Plantar flex
Actions of Peroneus Brevis
- eversion
2. Plantar flex
Actions of Peroneus Tertius
- eversion
2. Dorsi flex
Muscles of the Superficial Post. Compartment of the lower leg
- Gastrocnemius (2 heads)
- Soleus
- Plantaris
Peroneal Retinaculum
Holds tendons at ankle
Actions of gastrocnemius
- Flex knee
2. Plantar flex
Actions of soleus
- plantar flex
Actions of Pantaris
- Plantar flex
Muscles of Deep post. cmpartment of lower leg
- Tibialis post.
- Flexor Hallicus longus
- Flexor digitorum longus
Flexor retinaculum
holds tendons behind med. malleolus
Actions of Tibialis Post.
- Plantar flex
2. inversion
Actions of Flexor Hallicus longus
- Plantar Flex
2. Flex big toe
Actions of Flexor Digit. Longus
- Plantar Flex
2. flex toes
Achilles Tendon
common tendon of the gastrocnemius /soleus; united distally w/ plantaris to form tendon.
- inserts into post. calcaneus
- 2 busae
- superficial retrocalcaneal bursa
- Deep retrocalcaneal bursa