Arches

Question 1

What is the bony keystone of the medial longitudinal arch? What is the Muscular keystone? ligamentous keystone?

Answer 1

Bony keystone = talar head
Muscular keystone = tibialis posterior m.
Ligamentous keyston = plantar calcaneonavicular l. (spring l.)

Question 2

What is the single keystone of the lateral longitudinal arch?

Answer 2

Cuboid

Question 3

What is the primary function of the medial longitudinal arch?

Answer 3

Weight-bearing

Question 4

What is the primary function of the lateral longitudinal arch?

Answer 4

Balance

Question 5

What is the keystone of the transverse arch of the foot?

Answer 5

There is no keystone. Tricked ya! (154)
The shape of the united bones is most important for this arch.
Bones include cuboid, 3 cuneiforms, base of metatarsals 1-5

Question 6

What is the most common type of Pes Planus (flat feet)?

Flexible? Rigid? or Acquired?

Answer 6

Flexible - lack medial long. arch when standing, but arch reappears when not weight-bearing

Question 7

What provides muscular support for the transverse arch of the foot?

Answer 7

Fibularis longus t.
Tibialis posterior t.
Adductor hallucis m. (transverse head)

Question 8

What provides muscular support for the lateral arch of the foot?

Answer 8

Flexor digitorum longus m.

Abductor digiti minimi m.

Question 9

What is the most common hindfoot problem in runners?

Answer 9

Plantar Fasciitis

• Causes pain in heel and plantar surface of foot; point tenderness at proximal attachment
• Most painful after rest