LEA Quiz 9

Question 1

The lateral compartment are developmentally _____ and ____ axial, innervated by a nerve composed of ______ division fibers

Answer 1

developmentally dorsal

postaxial

posterior division

Question 2

Fibularis longus + brevis share a common sheath until the _____

Answer 2

peroneal trochlea

Question 3

Os vesalianum will be invested in _______

Answer 3

f. brevis

Question 4

What is the path of f. longus?

Answer 4

lateral side of cuboid -> perineal notch -> sesamoid (os perineum) -> sometimes pars peronea metatarlis primi -> base of 1st MT and medial cuneiform

Question 5

What 3 actions lead to supination?

Answer 5

remember PIAS DEEP

Plantarflexion
Inversion
Adduction
Supination

Question 6

What 3 actions lead to pronation?

Answer 6

Dorsiflexion
Eversion
Abduction
Pronation

Question 7

What happens during

Initial contact/heel strike
Foot flat to midstance
Heel up to toe off

Answer 7

Initial contact- > supination
Foot flat to midstance -> pronating adaptor
Heel up to toe off -> supination (stiff lever)

Question 8

What muscles are active prior to initial contact to prevent excessive inversion?

Answer 8

F. brevis + longus of lateral compartment

Question 9

What is f. longus function during heel strike to foot flat? Midstance?

Answer 9

Heel strike to foot flat -> aids pronation

Midstance-> plantarflex first ray for stability

Question 10

What is the blood supply for the lateral compartment?

Answer 10

Anterior tibial artery and fibular arteries