|The triangles of the neck. (Anterior triangles to the left; posterior triangles to the right. Occipital triangle labeled at center left.) )|
|Side of neck, showing chief surface markings. (Nerves are yellow, arteries are red.)|
|Gray's||subject #145 565|
It is covered by the skin, the superficial and deep fasciæ, and by the Platysma below.
The accessory nerve is directed obliquely across the space from the Sternocleidomastoideus, which it pierces, to the under surface of the Trapezius; below, the supraclavicular nerves and the transverse cervical vessels and the upper part of the brachial plexus cross the space.
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