foot ankle Flashcards

exam 2

1
Q

what muscle helps maintain the shape of the foot by pulling on both longitudinal and transverse arch of the foot

A

adductor hallucis

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2
Q

What is the primary function of the foot?

A

Locomotion (primarily propulsion) and accommodation (shock absorption)

Accommodation is largely blunted with footwear.

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3
Q

How many bones and joints are in the foot?

A

26 bones and 30+ joints

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4
Q

What are the three portions of the foot?

A
  1. Hindfoot
  2. Midfoot
  3. Forefoot
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5
Q

Name the biggest joints of the foot.

A
  1. Talocrural
  2. Subtalar
  3. Transverse Tarsal
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6
Q

What is the purpose of the arches of the foot?

A

Support weight distribution between weight-bearing portions of the foot

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7
Q

What are the three arches of the foot?

A
  1. Medial longitudinal arch
  2. Lateral longitudinal arch
  3. Transverse arch
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8
Q

What type of support do the arches of the foot have?

A

Dynamic and passive support

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9
Q

What is the role of the plantar calcaneonavicular ligament?

A

Brace talus, assist in weight transfer, maintain longitudinal arch of foot

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10
Q

What are the major ligaments of the foot?

A
  1. Plantar calcaneonavicular ligament
  2. Long plantar ligament
  3. Plantar calcaneocuboid ligament
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11
Q

What are the two groups of muscles in the foot?

A
  1. Muscles of the sole (plantar surface)
  2. Muscles of the dorsum (dorsal surface)
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12
Q

What is the innervation of the muscles on the sole of the foot?

A

Plantar nerves

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13
Q

What is the innervation of the muscles on the dorsum of the foot?

A

Deep fibular nerve

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14
Q

How many layers are there in the muscles of the sole?

A

4 layers

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15
Q

What is the action of the abductor hallucis muscle?

A

Abduction of digit 1/hallux at MTP & IP joints

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16
Q

Fill in the blank: The big toe is also known as the _______.

A

HALLUX

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17
Q

What are the two types of arch support?

A
  1. Dynamic support
  2. Passive support
18
Q

What is the clinical condition characterized by inflammation of the plantar fascia?

A

Plantar fasciitis

19
Q

What is the primary arterial supply to the foot?

A
  1. Dorsalis pedis
  2. Medial plantar artery
  3. Lateral plantar artery
20
Q

What are the nerve innervations of the dorsal surface of the foot?

A
  1. Saphenous
  2. Superficial & Deep fibular nerves
  3. Sural nerve
21
Q

What are the five compartments of the foot?

A
  1. Medial compartment
  2. Central compartment
  3. Lateral compartment
  4. Interosseous compartment
  5. Dorsal compartment
22
Q

What is the function of the quadratus plantae muscle?

A

Assists flexor digitorum longus muscle in flexion of digits 2-5

23
Q

True or False: The lateral longitudinal arch is higher than the medial longitudinal arch.

A

False

24
Q

What is the action of the plantar interossei muscles?

A

Adduction & flexion of digits 3-5 at MTP joints

25
Q

What is the origin of the extensor digitorum brevis muscle?

A

Calcaneus (floor of Sinus tali), interosseous talocalcaneal ligament, & extensor retinaculum

26
Q

What is the innervation of the flexor digiti minimi brevis muscle?

A

Lateral plantar nerve (superficial branch) (S1-S3)

27
Q

What are the actions of the dorsal interossei muscles?

A

Abduction and flexion of digits 2-4 at MTP joints

28
Q

What do the dorsal metatarsal arteries connect to?

A

Plantar arch

29
Q

How many dorsal digital arteries does each branch of the dorsal metatarsal arteries divide into?

A

2

30
Q

What is the dorsal plantar artery a branch of?

A

Posterior tibial artery

31
Q

Where does the dorsal plantar artery travel?

A

Deep to tarsal tunnel

32
Q

What are the branches of the dorsal plantar artery?

A
  • Medial plantar artery
  • Lateral plantar artery
33
Q

How does the medial plantar artery compare in size?

A

Comparatively small

34
Q

What does the medial plantar artery supply?

A

Muscles of hallux

35
Q

What structure does the medial plantar artery sometimes form?

A

Superficial plantar arch

36
Q

With which nerve does the lateral plantar artery travel?

A

Deep plantar nerve

37
Q

In which direction does the lateral plantar artery run?

A

Lateral to medial

38
Q

What does the lateral plantar artery form?

A

Deep plantar arch

39
Q

How many plantar metatarsal arteries does the lateral plantar artery have?

A

4

40
Q

What do each branch of the plantar metatarsal arteries divide into?

A

Plantar digital arteries