INNERVATION

Question 1

• courses with the anterior tibial artery
• in the ankle and foot, the nerve lies lateral to the artery and passes deep to the superior and inferior extensor retinaculum before dividing
• Ventral rami, dorsal division, L-5, S-1, S-2

Answer 1

Deep Fibular / Deep Peroneal Nerve

Question 2

• similar course as the arcuate artery or the lateral tarsal artery
• passes deep to and innervates the extensor digitorum brevis and extensor hallucis brevis muscle bellies
• sends minute branches into the 2nd through 4th interspaces which supply the intertarsal, tarsometatarsal and metatarsophalangeal joints in these areas

Answer 2

Lateral Terminal Branch of the Deep Fibular / Deep Peroneal Nerve

Question 3

• appears to be the continuation of the deep fibular / deep peroneal nerve
• courses with the dorsalis pedis artery, then the 1st dorsal metatarsal artery
• at the 1st web space it pierces the fascia dorsalis pedis and becomes subcutaneous
• innervates 1st metatarsal-medial cuneiform joint and 1st metatarsophalangeal joint
• partial innervation for the 1st dorsal interosseous muscle

Answer 3

Medial Terminal Branch of the Deep Fibular / Deep Peroneal Nerve

Question 4

• the medial branch of the nerve after it exits the deep fascia
• innervates the lateral aspect of the hallux

Answer 4

(Proper) Dorsal Digital Nerve 2

Question 5

• the lateral branch of the nerve after it exits the deep fascia
• innervates the medial aspect of the 2nd toe
• The other (proper) dorsal digital nerves, which were discussed in the Subcutaneous Layer are branches from the medial, intermediate and lateral dorsal cutaneous nerves of the foot. These are branches of the superficial fibular and sural nerves. Along the dorsum of the foot, these nerves are superficial to the muscles and are found within the subcutaneous layer. The
  proper dorsal digital nerves are also plantar (deep) to the superficial veins.

Answer 5

(Proper) Dorsal Digital Nerve 3

Question 6

The plantar aspect of the foot is covered with a _____?

Answer 6

thick cutaneous layer / skin (averages

0.64mm) as well as a thick subcutaneous layer of adipose tissue called the plantar fat pad (averages 18 mm)