A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . middle third of each pes ped-unculi (Fig. 1015), having come from the centralconvolutions through the corona radiata and anteriorpart of the posterior division of the internal capsule(Fig. 1014, B). Each motor tract, at its entranceinto the pons, contains fibers whose destination is tothe motor centers for the face, arm, and leg of theopposite side. But the centers of the facial nervelie in the pons Varolii (Figs. 1020 and 1021). In itspassage through the , th
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . middle third of each pes ped-unculi (Fig. 1015), having come from the centralconvolutions through the corona radiata and anteriorpart of the posterior division of the internal capsule(Fig. 1014, B). Each motor tract, at its entranceinto the pons, contains fibers whose destination is tothe motor centers for the face, arm, and leg of theopposite side. But the centers of the facial nervelie in the pons Varolii (Figs. 1020 and 1021). In itspassage through the , therefore, the facial divi-sion of the motor tract leaves the remainder andcrosses the median line. This crossing is made byway of the raphe, fibers leaving the longitudinalbundles in the ventral half of the pons, turning dorsad,entering the raph^, decussating with similar fibersfrom the opposite side, and then turning laterad toreach the facial nucleus (see Figs. 1020 and 1021).From the facial nucleus the facial nerve out-ward to the side of the pons, having first passedinward and curved around the abducens nucleus in. Fig. 1016.—Section through the Pons. (Wernicke, X 2.) stsand ale, .Superficial and deep transverse bundles of fibers inter-secting the longitudinal bundles, and terminating in the massesof gray matter of the basal portion; />i, median fasciculus of thepes; I, lemniscus; l\, lower lemniscus; ^^^ red nucleus of tegmentum;cs, superior peduncle of cerebellum, some fibers of which are de-cussating in the raphi^; cp, fibers in formatio reticularis, whichhave come from the posterior commissure; ht, posterior longi-tudinal bundle; IV, descending root of the fifth nerve; IV, fourthnerve decussating in the valve of Vieusseas. the .so-called knee of the facial nerve. The accom-panying diagram indicates the course of the motortract in the pons and medulla. As a result of thedivision of the motor tract of one side, lesions in thepons produce different forms of par
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Keywords: ., bookauthorbuckalbe, bookcentury1900, bookdecade1910, bookyear1913
