Hooper, Robert [Hrsg.]: The Anatomist's Vade-Mecum: Containing The Anatomy, Physiology, Morbid Appearances, &c. Of The Human Body ; The Art of making Anatomical Preparations, &c. To which are added Anatomical, Physiological, Medical, And Surgical Examinations For Students (London, 1811)

( 192 )

transverse process, and are distributed about the occiput and
neck.

The second pair of cervical nerves send a branch to the ac-
cessory nerve of Willis, and proceed to the parotid gland, and
external ear.

The third cervical pair supply the integuments of the sca-
pula, cucullaris, and triangularis muscles, and send a branch
to assist informing the diaphragmatic nerve.

The fourth pair sends off two branches ; one to unite with
branches from the second and fifth cervical pairs, and this
union forms the accessory nerve of Willis; the other to unite
with a branch from the third and fifth cervical, which forms
the diaphragmatic nerve.

The fourth, fifth, sixth, seventh, and eighth pairs all converge
to form the brachial plexus, from which arise the accessory
nerves of Willis, the diaphragmatic nerve, and the nerves of
the upper extremities, which are therefore to be considered
here.

ACCESSORY NERVE OF WILLIS.

This arises on both sides of the neck, from the union of
branches from the second, fourth, and fifth pairs, proceeds
upwards through the great occipital foramen to the medulla
oblongata, where it joins the par vagum, and accompanies it
out of the skull, through the foramen lacerum in hasi cranii,
and then leaves it to be distributed on the cucullaris and ster-
no-cleido-mastoideus muscles.

DIAPHRAGMATIC NERVE.

The diaphragmatic nerve, which is also called the phrenic?
nerve, is formed in theneckby theunio:i of the branches from
the third, four tit, and fifth cervical pairs, and by a branch