Inferior Calcaneal Nerve (Baxter Nerve): Difference between revisions
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|caption=Baxter nerve is the nerve labelled nerve to abductor digiti quinti. | |caption=Baxter nerve is the nerve labelled nerve to abductor digiti quinti. | ||
|type=Mixed nerve | |type=Mixed nerve | ||
|branchfrom=First branch of lateral plantar nerve. L4-S4 ventral rami from the sciatic nerve. | |branchfrom=First branch of [[Lateral Plantar Nerve|lateral plantar nerve]]. L4-S4 ventral rami from the sciatic nerve. | ||
|course=Passes between [[Abductor Hallucis]] and [[Quadratus Plantae]], and along the medial border of the long plantar ligament. | |course=Passes between [[Abductor Hallucis]] and [[Quadratus Plantae]], and along the medial border of the long plantar ligament. | ||
|sensoryinnervates=Long plantar ligament, calcaneal periosteum, and anterior calcaneal tubercle | |sensoryinnervates=Long plantar ligament, calcaneal periosteum, and anterior calcaneal tubercle | ||
|motorinnervates=[[Abductor Digiti Minimi]], [[Quadratus Plantae]], [[Flexor Digitorum Brevis]] | |motorinnervates=[[Abductor Digiti Minimi]], [[Quadratus Plantae]], [[Flexor Digitorum Brevis]] | ||
|conditions=[[Baxter's Nerve Entrapment]] | |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. | }} | ||
The first branch of the lateral plantar nerve is also known as the inferior calcaneal nerve or Baxter's nerve. | |||
== Proximal and Related Structures == | ==Proximal and Related Structures== | ||
The L4-S4 ventral rami form the sciatic nerve. The [[Sciatic Nerve|sciatic nerve]] divides in the distal thigh into the [[Tibial Nerve|tibial nerve]] and [[Peroneal Nerve|peroneal nerve]]. The tibial nerve passes through the deep [[Posterior Compartment of the Leg|posterior compartment of the leg]]. | The L4-S4 ventral rami form the sciatic nerve. The [[Sciatic Nerve|sciatic nerve]] divides in the distal thigh into the [[Tibial Nerve|tibial nerve]] and [[Peroneal Nerve|peroneal nerve]]. The tibial nerve passes through the deep [[Posterior Compartment of the Leg|posterior compartment of the leg]]. | ||
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The lateral plantar nerve supplies sensation to the lateral plantar aspect of the foot, 5th toe, and lateral half of the 4th toe. It supplies motor innervation to the remaining foot muscles that aren't innervated by the medial plantar nerve. | The lateral plantar nerve supplies sensation to the lateral plantar aspect of the foot, 5th toe, and lateral half of the 4th toe. It supplies motor innervation to the remaining foot muscles that aren't innervated by the medial plantar nerve. | ||
== Course == | ==Course== | ||
Baxter's nerve is first branch of the lateral plantar nerve. 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. | Baxter's nerve is first branch of the lateral plantar nerve. 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 == | ==Innervation== | ||
It is a mixed nerve. | It is a mixed nerve. | ||
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Sensory supply is to the calcaneal periosteum, long plantar ligament, and adjacent vessels. | Sensory supply is to the calcaneal periosteum, long plantar ligament, and adjacent vessels. | ||
== Variation == | ==Variation== | ||
It can originate directly from the [[Posterior Tibial Nerve]] | It can originate directly from the [[Posterior Tibial Nerve]] | ||
Revision as of 11:13, 16 April 2022
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| Inferior Calcaneal Nerve (Baxter Nerve) | |
|---|---|
| Nerve Type | Mixed nerve |
| Origin | First branch of lateral plantar nerve. L4-S4 ventral rami from the sciatic 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.
Proximal and Related Structures
The L4-S4 ventral rami form the sciatic nerve. The sciatic nerve divides in the distal thigh into the tibial nerve and peroneal nerve. The tibial nerve passes through the deep posterior compartment of the leg.
The tibial nerve ramifies into the medial plantar nerve, lateral plantar nerve, and medial calcaneal nerves. The nerves exit the tarsal tunnel and continue to the plantar aspect of the foot.
The medial plantar nerve runs anterior to the lateral plantar nerve. It supplies sensory information to the medial two thirds of the plantar foot, and motor innervation to the flexor digitorum brevis, abductor hallucis, flexor hallucis brevis, and first lumbrical.
The lateral plantar nerve supplies sensation to the lateral plantar aspect of the foot, 5th toe, and lateral half of the 4th toe. It supplies motor innervation to the remaining foot muscles that aren't innervated by the medial plantar nerve.
Course
Baxter's nerve is first branch of the lateral plantar nerve. 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
