Page 58 - Edited - Webster HEAD AND NECK - part 2-Merge PDF
P. 58
HN 252
THE FACIAL NERVE.
A. FACIAL PALSY.
Bell's palsy is the result of destruction of the facial nerve or its nucleus (pons), or of some transient defect
in its function. After a stroke (iii), responding to the request to smile or to grin distorts the mouth as in (ii)
(the eyes are, of course, normal), but social smiling is unaffected (see Fig. 24, and Vol. II, Fig. 130).
(i) Bell's palsy on the left (ii) "Screw up your face" (iii) The mild palsy of the
left Bell's palsy lower face after a stroke.
(Lesion on the right.)
B. GENICULATE (GANGLION) HERPES ZOSTER.
KEW:SC
Zoster infections of the facial nerve sensory ganglion (the geniculate ganglion) produce vesicular eruptions in
the mouth (anterior two thirds of the tongue, and on the palate), and in the external auditory meatus.
