Inferior Calcaneal Nerve (Baxter Nerve)

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Baxter nerve is the nerve labelled nerve to abductor digiti quinti.
Inferior Calcaneal Nerve (Baxter Nerve)
Nerve Type	Mixed nerve
Origin	First branch of lateral plantar nerve
Course	Passes between Abductor Hallucis and Quadratus Plantae, and along the medial border of the long plantar ligament.
Sensory innervation	Long plantar ligament, calcaneal periosteum, and anterior calcaneal tubercle
Motor innervation	Abductor Digiti Minimi, Quadratus Plantae, Flexor Digitorum Brevis
Conditions	Baxter's Nerve Entrapment

The first branch of the lateral plantar nerve is also known as the inferior calcaneal nerve or Baxter's nerve.

Course

It arises from the lateral plantar nerve at various levels under the deep fascia of the Abductor Hallucis muscle. It runs vertically in between the Abductor Hallucis and Quadratus Plantae and then makes a sharp 90 degree turn horizontally. It passes laterally under the Calcaneus to supply the Abductor Digiti Minimi muscle.

Innervation

It is a mixed nerve.

Motor supply is to the Abductor Digiti Minimi, and occasionally to the Flexor Digitorum Brevis and lateral half of the Quadratus Plantae

Sensory supply is to the calcaneal periosteum, long plantar ligament, and adjacent vessels.

Variation

It can originate directly from the Posterior Tibial Nerve