The
supraclavicular nerves (descending branches) arise from the third and fourth
cervical nerves; they emerge beneath the posterior border of the
Sternocleidomastoideus, and descend in the
posterior triangle of the neck beneath the
platysma and
deep cervical fascia.
Branches
Near the clavicle they perforate the fascia and Platysma to become cutaneous, and are arranged, according to their position, into three groups—anterior, middle and posterior.
Medial supraclavicular nerve
The
medial supraclavicular nerves or
anterior supraclavicular nerves (nn. supraclaviculares anteriores; suprasternal nerves) cross obliquely over the
external jugular vein and the clavicular and sternal heads of the
sternocleidomastoideus, and supply the skin as far as the middle line. They furnish one or two filaments to the
sternoclavicular joint.
Intermedial supraclavicular nerve
The
intermedial supraclavicular nerve middle supraclavicular nerves (nn. supraclaviculares medii; supraclavicular nerves) cross the
clavicle, and supply the skin over the
pectoralis major and
deltoideus, communicating with the cutaneous branches of the
upper intercostal nerves.
===Lateral supraclavicular nerve=== <!--Lateral supraclavicular nerve redirects here-->The
lateral supraclavicular nerve or
posterior supraclavicular nerves(nn. supraclaviculares posteriores; supra-acromial nerves) pass obliquely across the outer surface of the
trapezius and the
acromion, and supply the skin of the...
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