Superior cardiac nerve

Superior cardiac nerve

Infobox Nerve
Latin = nervus cardiacus cervicalis superior
GraySubject = 216
GrayPage = 979

Caption = Diagram of the cervical sympathetic. (Superior cardiac nerve labeled at center right.)

Caption2 =
Innervates = heart
BranchFrom = superior cervical ganglion
BranchTo =
MeshName =
MeshNumber =
DorlandsPre = n_05
DorlandsSuf = 12565306
The superior cardiac nerve arises by two or more branches from the superior cervical ganglion, and occasionally receives a filament from the trunk between the first and second cervical ganglia.

It runs down the neck behind the common carotid artery, and in front of the Longus colli muscle; and crosses in front of the inferior thyroid artery, and recurrent nerve.

The course of the nerves on the two sides then differ.

Right nerve

The right nerve, at the root of the neck, passes either in front of or behind the subclavian artery, and along the innominate artery to the back of the arch of the aorta, where it joins the deep part of the cardiac plexus.

It is connected with other branches of the sympathetic; about the middle of the neck it receives filaments from the external laryngeal nerve; lower down, one or two twigs from the vagus; and as it enters the thorax it is joined by a filament from the recurrent nerve.

Filaments from the nerve communicate with the thyroid branches from the middle cervical ganglion.

Left nerve

The left nerve, in the thorax, runs in front of the left common carotid artery and across the left side of the arch of the aorta, to the superficial part of the cardiac plexus.

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