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NERVI AUDITORII.
The seventh pah-, or auditory nerves, as they are commonly
called, originate on each side by two branches, the portio
dura, and portio mollis.
The portio dura is, in fact, a nerve of the face, and is
therefore, with more propriety, called the facial nerve: it
arises from the fourth ventricle of the brain, passes through
the aquaductus Fallopii, in the petrous portion of the temporal
bone, where it gives off the chorda tympani, which joins the
lingual of the fifth pair, proceeds through the stylq-n >id fo-
ramen, perforates the parotid gknd, ar.d then divides into
seven or eight branches, v.Tuch constitute the pes ansf.rinls,
supply the ear, parotid glandy and muscles of the face, and
communicate with the branches of the fifth pair on the face.
The portio mollis, or auditory nerve, arises from the me-
dulla oblongata, and the fourth ventricle, liters the internal
auditory passage, and is distributed by innumerable branches
on the membrane of the cochlea, vestibulum, forming the im-
mediate organ of hearing.
PAR VAGUM.
The eighth pair, or par vagum, arise by several branches,
partly from the medulla oblongata, and partly from the fourth
ventricle, behind the pons Varolii. It is connected, at its
origin, with the accessory nerves of Willis; which ascend
through the great occipital foramen, from the fifth cervical
nerve: these nerves proceed together through the fora-
men lacerum in bast cranii. The accessory nerves then
separate from the par vagum, and vanish in the sterno-
cieido-mastoideus, and cucullaris muscles: the par vagum
NERVI AUDITORII.
The seventh pah-, or auditory nerves, as they are commonly
called, originate on each side by two branches, the portio
dura, and portio mollis.
The portio dura is, in fact, a nerve of the face, and is
therefore, with more propriety, called the facial nerve: it
arises from the fourth ventricle of the brain, passes through
the aquaductus Fallopii, in the petrous portion of the temporal
bone, where it gives off the chorda tympani, which joins the
lingual of the fifth pair, proceeds through the stylq-n >id fo-
ramen, perforates the parotid gknd, ar.d then divides into
seven or eight branches, v.Tuch constitute the pes ansf.rinls,
supply the ear, parotid glandy and muscles of the face, and
communicate with the branches of the fifth pair on the face.
The portio mollis, or auditory nerve, arises from the me-
dulla oblongata, and the fourth ventricle, liters the internal
auditory passage, and is distributed by innumerable branches
on the membrane of the cochlea, vestibulum, forming the im-
mediate organ of hearing.
PAR VAGUM.
The eighth pair, or par vagum, arise by several branches,
partly from the medulla oblongata, and partly from the fourth
ventricle, behind the pons Varolii. It is connected, at its
origin, with the accessory nerves of Willis; which ascend
through the great occipital foramen, from the fifth cervical
nerve: these nerves proceed together through the fora-
men lacerum in bast cranii. The accessory nerves then
separate from the par vagum, and vanish in the sterno-
cieido-mastoideus, and cucullaris muscles: the par vagum