Dissection 7/8- Foot Flashcards
What type of joint is the subtalar joint? What movements does this allow?
- Synovial plane joint
- Inversion and eversion of the foot
Which two joints combine to form the midtalar joint?
- Talocalcaneonavicular Joint
- Calcaneocubiod Joint
What type of joint is the talocalcaneonavicular joint?
Synovial ball and socket
What type of joint is the calcaneocuboid joint?
Synovial plane joint
What are the main movements of the midtalar joint?
- Inversion
- Eversion
- Circumduction
Inversion of the foot is produced by which muscles via which nerves?
Tibialis anterior and tibialis posterior via the tibial/deep fibular nerves
Eversion of the foot is produced by which muscles via which nerves?
Fibularis muscles via the superficial and deep fibular nerves
What type of joint are the tarsometatarsal joints?
Synovial plane joints
What movement do the tarsometatarsal joints allow?
Gliding/sliding movements between the cuneiforms/cuboid and the metatarsals
What movements do the matatarsophalangeal joints allow?
Flexion, extension, abduction, adduction and circumduction of the digits
What type of joint are the interphalangeal joints? What movements do they allow?
Synovial hinge joints
Flexion and extension of the toes
How many tarsals/metatarsals/phalanges are found in the foot?
- 7 tarsals
- 5 metatarsals
- 14 phalanges
What bones form the hind foot?
Talus and calcaneus
What bones form the mid foot?
Navicular, cuboid and cuneiforms
What bones for the forefoot?
Metatarsals and phalanges
The deep fascia on the dorsum of the foot is continuous with what?
Inferior extensor retinaculum
What is the deep fascia of the sole of the foot?
Plantar fascia
What is the thick central part of the plantar fascia known as?
Plantar aponeurosis
What is the function of the plantar fascia?
Supports the longitudinal arches of the foot
Which bone does the plantar aponeurosis arise from? Where does it pass to?
- Arises from calcaneus
- Divides into 5 bands and passes to the toes
Give three functions of the arches of the feet.
- Shock absorption
- Push off in walking function
- Increased weight bearing capacity to the whole foot
What two structures support the arches of the foot?
- Plantar fascia
- Plantar ligaments
Which arch of the foot is split into medial and lateral parts?
Longitudinal arch
Which of the two longitudinal arches is higher and more important?
Medial
What bones is the medial longitudinal arch of the foot composed of?
- Calcaneus
- Talus
- Navicular
- 3 Cuneiforms
- 1st-3rd Metatarsals
What structure is the keystone of the medial longitudinal arch?
Talar head
Which muscles (via their tendons) help to support the medial longitudinal arch?
- Tibialis anterior
- Tibialis posterior
- Fibulas longus