scalenus

One additional muscle binds down the subclavian artery, viz., the scalenus anticus.

Surgical Anatomy Joseph Maclise

Cervical plexus of nerves giving off the phrenic nerve to descend the neck on the outer side of the internal jugular vein and over the scalenus muscle.

Surgical Anatomy Joseph Maclise

A, the subclavian artery, in the third part of its course, as it emerges from behind N, the scalenus anticus; L, the transversalis colli artery,

Surgical Anatomy Joseph Maclise

In the neck, the subclavian artery, B, Plate 11, is seen to be separated from the subclavian vein, A, by the breadth of the anterior scalenus muscle, D, as the vessels arch over the first rib, F.

Surgical Anatomy Joseph Maclise

In lean but muscular bodies, it is possible to feel the projection of the anterior scalenus muscle under the skin, external to the sterno-mastoid.

Surgical Anatomy Joseph Maclise

The root of the internal jugular vein, when injected, will be seen to occupy considerable space behind the clavicle; and the anterior scalenus muscle is substantial and fleshy.

Surgical Anatomy Joseph Maclise

An instance is recorded by Blandin in which the vein passed in company with the artery under the scalenus muscle.

Surgical Anatomy Joseph Maclise

The subclavian artery, A, Plate 4, first appears superficial to the above-named muscles of the cervical region just at the point where, passing from behind the scalenus muscle, N, Plate 4, which also conceals it, it sinks behind the clavicle.

Surgical Anatomy Joseph Maclise

The posterior belly of the omo-hyoid muscle, K, and the anterior scalenus muscle, N, form the sides and apex of this lesser triangular space, while the horizontal clavicle forms its base.

Surgical Anatomy Joseph Maclise

Left subclavian vein, which lies anterior to d, the scalenus anticus muscle.

Surgical Anatomy Joseph Maclise