Nucleus fasc.solitariusGeniculateganglionChordatympaniNasal andpalatineglandsLacrimalglandTrigeminalganglionMajor superficialpetrosal nerveIIIIIILingual nerveSubmandibular gang.Submandibular glandPterygopalatineganglionSublingualglandCBAMotor rootN. VIIFasc. solitariusMotor nucleusN. VIISup. salivatorynucleusVI
Figure 44-3. Scheme of the seventh cranial (facial) nerve. The motor fibers are represented by the solid purple line originating in the motor nucleus of VII. Parasympathetic fibers are represented by regular dashes; special visceral afferent (taste) fibers are represented by long dashes and dots. A, B, and C denote lesions of the facial nerve at the stylomastoid foramen, distal to the geniculate ganglion, and proximal to the geniculate ganglion. Disturbances resulting from lesions at each of these sites are described in the text. (From Carpenter MB, Sutin J: Human Neuroanatomy, 8th ed. Baltimore, Williams & Wilkins, 1982, by permission.)
Figure 44-4. Anatomic features of the vagus nerve. Note the relationship to the spinal- accessory and glossopharyngeal nerves at the jugular foramen and the long course of the left recurrent laryngeal nerve, which is longer than the right and hooks around the aortic arch (not shown).
Figure 44-5. Nasopharyngeal carcinoma invading the anterior left  side of the base of the skull and nasopharynx and causing third and fifth nerve palsies. Axial CT of the anterior skull base.
Chapter  44    Diseases of the Cranial Nerves
Motor nucleusN. VMotor nucleusN. VIINucleus N. XIINucleus spinal VMotor rootfibersSecondary tri-geminal fibersSpinal VIIIIIIGasserianganglionMesencephalic nucleusPrincipal sensorynucleus
Distal vagusEsophageal plexusEsophageal hiatusof diaphragmSuperior cardiac ramiInferior cardiac ramiPulmonary branchesAnterior and posteriorvagus nervesRecurrent laryngeal n.Cervical vagusInt. jugular v.Int. carotid a.(Muscles and mucosa ofpharnyx, soft palate) (Mucosa and glands oflarnyx and epiglottis)Trachea and esophagusLaryngeal muscles(Cricothyroid m) Glossopharyngeal n.Meningeal br.Auricular br.Vagus n.Spinal accessory n.Jugular foramenJugular ganglionNodose ganglionDorsal motor nucleus of vagusNucleus ambiguusPharyngeal branchSuperior laryngeal br
Diseases of Muscle
Skeletal, or voluntary, muscle constitutes the principal organ of motion, as well as a vast metabolic reservoir. Disposed in more than 600 separate muscles, this tissue makes up as much as 40 percent of the weight of adult human beings. An intricacy of structure and function undoubtedly accounts for its diverse susceptibility to disease, for which reason the main anatomic and clinical facts are provided as an introduction to the muscle diseases.