Ankle and foot intrinsic muscles

Question 1

Which muscles are on the first (most superficial) layer of the foot

Answer 1

Flexor Digitorum Brevis
Abductor Hallucis
Abductor digiti minimi

Question 2

Which muscles are on the second layer of the foot

Answer 2

Quadratus plantae
Lumbricals

Question 3

Which muscles are on the third layer of the foot

Answer 3

Flexor hallucis brevis
Adductor hallucis
Flexor digiti minimi brevis

Question 4

Which muscles are on the fourth (most deep) layer of the foot

Answer 4

Dorsal interossei
Plantar interossei

Question 5

What are the two intrinsic muscles on the dorsal aspect of the foot

Answer 5

Extensor digitorum brevis
Extensor hallucis brevis

Question 6

What 3 systems does the foot core system consist of

Answer 6

Neural, active and passive subsystems

Question 7

What is the neural subsystem of the foot core system

Answer 7

consists of mechanoreceptors in the muscles, tendons,
ligaments, plantar fascia and skin that detect stimuli such as cutaneous sensation, pressure, and tension

Question 8

What is the passive subsystem of the foot core system

Answer 8

A passive subsystem that includes the static stabilizers of the ankle and foot * The bones of the arches, the plantar fascia, the ligaments of the foot

Question 9

What is the active subsystem of the foot core system

Answer 9

An active subsystem that includes the dynamic stabilizers of the ankle and foot* These include the extrinsic and intrinsic muscles

Question 10

Function of the intrinsic muscles of the foot

Answer 10

Increase the stability of the joints within the foot (or the arches of the foot).
This will also provide a stable base for the larger extrinsic muscles to cause
the gross motions
The intrinsic muscles of the foot also function to distribute forces acting on
the foot. This may help to lower forces acting on other structures, such as the plantar fascia