NERVE SUPPLY DEFINITIONS

Question 1

• the smaller posterior branch of the tibial nerve
• ventral divisions ventral rami S-1 & S-2
• courses with the lateral plantar artery; deep to the flexor digitorum brevis
  muscle and superficial to the quadratus plantae muscle; intermediate to
  layers 1 and 2, lying just anterior (distal) to the lateral plantar artery in the
  foot, normally
• provides muscular innervation to the following: abductor digiti minimi muscle; quadratus plantae muscle; 2nd, 3rd and 4th lumbrical muscles; adductor hallucis
  muscle (transverse and oblique heads); flexor digiti minimi brevis muscle;
  opponens digiti minimi muscle (when present); the plantar interosseous
  muscles; the dorsal interosseous muscles;
• provides cutaneous innervation, plantarly to the lateral 1½ toes, and the lateral 1/3 of the midfoot and forefoot
• provides articular innervation to calcaneocuboid, lateral cuneonavicular and cuboideonavicular joints prior to dividing

Answer 1

Lateral Plantar Nerve

Question 2

• arises near the base of the 5th metatarsal
• provides cutaneous, articular and muscular branches along its course
• provides muscular innervation to the flexor digiti minimi brevis muscle, 3rd 186 plantar interosseous muscle, and the 4th dorsal interosseous muscle
• provides articular innervation to the 5th metatarsophalangeal, 4th intermetatarsal, and 5th interphalangeal joints

Answer 2

Superficial Branch

Question 3

• arises near the base of the 5th metatarsal
• provides cutaneous, articular and muscular branches along its course
• provides muscular innervation to the flexor digiti minimi brevis muscle, 3rd plantar interosseous muscle, and the 4th dorsal interosseous muscle
• provides articular innervation to the 5th metatarsophalangeal, 4th intermetatarsal, and 5th interphalangeal joints

Answer 3

Superficial Branch

Question 4

• a cutaneous branch that supplies the plantar lateral aspect of the 5th toe
• becomes cutaneous near the 5th metatarsal midshaft

Answer 4

(Proper) Digital Plantar Nerve 10 (of 5th digit)

Question 5

• passes distally in the 4th interspace, then passes plantar to the deep transverse metatarsal ligament and divides
• becomes cutaneous near the metatarsal head

Answer 5

Fourth Common Digital Plantar Nerve

Question 6

• cutaneous branches which arise distal to the deep transverse metatarsal
  ligament
• 9 supplies cutaneous innervation to the plantar medial aspect of the 5th
  toe and 8 supplies cutaneous innervation to the plantar lateral aspect of the 4th toe

Answer 6

(Proper) Digital Plantar Nerves 9 and 8

Question 7

• from the superficial lateral plantar nerve

- joins the 3rd common digital plantar nerve, a branch of the medial plantar n.

Answer 7

Communicating Branch

Question 8

• passes medially from near the base of the 5th metatarsal with the plantar
  arterial arch
• passes intermediate to layers 3 and 4
• provides muscular innervation to the 2nd, 3rd and 4th lumbrical muscles;
  adductor hallucis muscle; 1st and 2nd plantar interosseous muscles; and 1st, 2nd and 3rd dorsal interosseous muscles
• provides articular innervation to the 2nd and 3rd intermetatarsal, and 2nd through 4th metatarsophalangeal joints

Answer 8

Deep Branch

Question 9

• the larger anterior branch of the tibial nerve
• ventral divisions ventral rami L-4, L-5
• courses with the medial plantar artery; intermediate to the abductor hallucis
  muscle (medial) and the flexor digitorum brevis muscle (lateral); within layer
  1, lying anterior (distal) to the artery
• provides muscular innervation to the following: abductor hallucis muscle, flexor
  digitorum brevis muscle, flexor hallucis brevis muscle, and 1st lumbrical muscle
• provides cutaneous innervation, plantarly, to the medial 3½ toes, and the
  medial 2/3 of the midfoot and forefoot
• provides articular innervation to subtalar, talonavicular, cuneonavicular prior to
  digital nerves arising

Answer 9

Medial Plantar Nerve

Question 10

• provides cutaneous innervation to the plantar medial aspect of the hallux
• becomes cutaneous near the 1st metatarsal midshaft

Answer 10

(Proper) Digital Plantar Nerve 1 (of the Hallux)

Question 11

• passes distally in the 1st interspace, passes plantar to the deep transverse
  metatarsal ligament then divides
• becomes cutaneous near the 1st metatarsal head
• provides articular innervation to the 1st tarsometatarsal, 1st metatarsophalangeal, and 1st interphalangeal joints

Answer 11

Common Digital Plantar Nerve 1

Question 12

• cutaneous branches which are terminal divisions of common digital plantar nerve 1 and arise near the deep transverse metatarsal ligament
• 2 supplies the plantar lateral aspect of the hallux and 3 supplies the plantar medial aspect of the 2nd toe

Answer 12

(Proper) Digital Plantar Nerves 2 and 3

Question 13

• passes distally in the 2nd interspace, passes plantar to the deep transverse metatarsal ligament and divides
• becomes cutaneous near the 2nd metatarsal head
• provides articular innervation to the interphalangeal joints of the 2nd and 3rd toes

Answer 13

Common Digital Plantar Nerve 2

Question 14

• cutaneous branches that are terminal divisions of common digital plantar nerve 2 and arise near the deep transverse metatarsal ligament
• 4 supplies the plantar lateral aspect of the 2nd toe and 5 supplies the
  plantar medial aspect of the 3rd toe

Answer 14

(Proper) Digital Plantar Nerves 4 and 5

Question 15

• passes distally in the third interspace, is joined by the communicating branch of the lateral plantar nerve, passes plantar to the deep transverse metatarsal
  ligament and divides
• provides articular innervation to the interphalangeal joints of the 3rd and 4th toes

Answer 15

Common Digital Plantar Nerve 3

Question 16

• cutaneous branches which are terminal divisions of common digitalnplantar nerve 3 and arise near the deep transverse metatarsal ligament
• 6 supplies the plantar lateral aspect of the 3rd toe and 7 supplies the
  plantar medial aspect of the fourth toe

Answer 16

(Proper) Digital Plantar Nerves 6 and 7