Page 57 - Edited - Webster HEAD AND NECK - part 2-Merge PDF
P. 57

THE FACIAL (SEVENTH CRANIAL) NERVE-SCHEMATIC SUMMARY.
 (After J.C.B. Grant- simplified and amended).




 Int. auditory   petrosal n.
 meatus                                                           Lacrimal gland


 CEREBELLUM   Geniculate
 PONS   ganglion


 Sensory and motor   PTERYGOPALATINE                                 Secretory fibres to
 roots of Nerve VII                                                     glands of nose
 MEDULLA       PARASYMPATHETIC
                            ganglion
 IN PONTO-CEREBELLAR
 ANGLE
                    PALATE
 Stapedius    MUSCLE IN MIDDLE   (taste buds &
 EAR                 glands)


                                 Secretory fibres
 TYMPANIC MEMBRANE               (Taste fibres, with cell bodies                                      HN
 ("EAR DRUM")                    in GENICULATE ganglion,
                                       are not shown)
 Auricular                                                                                            251
 branch conveying general
 sensory fibres of N.VIL
 Call bodies in
 geniculate ganglion

 "MUSCLES OF
 FACIAL
 Stylomastoid foramen   EXPRESSION"   TASTE fibres with cell
                                 bodies in geniculate
                                      ganglion

                                                      ORAL TONGUE
   PHARYNGEAL
     TONGUE
      (stippled)
 PAROTID SALIVARY
 GLAND (NOT
 innervated by facial   EPIGLOTTIS
 nerve)

 SUBMANDIBULAR                         Sublingual
 REMEMBER THAT ALL SENSORY FIBRES OF THE FACIAL NERVE   PARASYMPATHETIC   SALIVARY
 HAVE THEIR CELL BODIES IN THE GENICULATE GANGLION IN   GANGLION   gland
 THE FACIAL CANAL WITHIN THE (PETROUS) PEMPORAL BONE.
 THIS GANGLION THEREFORE HAS NO SYNAPSES WITHIN IT &,
 LIKE ALL SENSORY GANGLIA, CAN BE INFECTED WITH THE VIRUS   Submandibular SALIVARY
 OF SHINGLES (HERPES ZOSTER).   gland
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