. A treatise on nervous and mental diseases, for students and practitioners of medicine. ng in the pyramids at Py, and the sensory fibresrunning in the lateral and medial portions of the lemniscus at Lmland Ijm., and also in the tegmentum, Frig., whilst the transversefibres of the pons are seen at Po, so that we view here micro- 48 INTRODUCTORY. scopioally what Ave have seen with the naked eye in Fig. 22. Theposterior longitudinal fascieulns, Flp, is a strand of nerve fibresconnecting the nnclei of the ocular muscles and probably also othermotor nuclei; although there is still some doubt in th
. A treatise on nervous and mental diseases, for students and practitioners of medicine. ng in the pyramids at Py, and the sensory fibresrunning in the lateral and medial portions of the lemniscus at Lmland Ijm., and also in the tegmentum, Frig., whilst the transversefibres of the pons are seen at Po, so that we view here micro- 48 INTRODUCTORY. scopioally what Ave have seen with the naked eye in Fig. 22. Theposterior longitudinal fascieulns, Flp, is a strand of nerve fibresconnecting the nnclei of the ocular muscles and probably also othermotor nuclei; although there is still some doubt in the matter, forSpitzkas claim that this tract was well developed in amphibia andreptiles, unless their organs had been injured, has been contradictedby Von Guddens assertion that moles, entirely lacking in nuclei ofthe nerves of the ocular muscles, have as large a posterior fasciculusas rabbits. The nucleus of the motor root of the fifth pair is seenat NVm, and at Vm are the nerve fibres passing from it. To the outerside of these are the fibres of the sensory root of the fifth pair. At. Drawing of section through the valve of Vieussens and the lingula. Magnified diameters. Pj/. Pyramid. Po. Transverse fibres of pons. Frtg. Central field oi tegmentum. Jjm. Lemniscus. L7nl. Lateral lemniscus. LmP. Nerve tract connecting pes of crura cerebri with lemnisco-pedal tract. Ftp. Posterior longitudinal fasciculus. Lng. Lingula of cerebellum. Aq. Aqueduct of Sylvius. Leo is seen the so-called locus cceruleus or substantia ferniginea, a col-lection of large, dark, pigmented cells—although the former term, itshould be remembered, is sometimes applied to a dark brown or bluishspot, four to six millimetres in length, occasionally observed in thefloor of the fourth ventricle. The locus cceruleus, here depicted, sendsoff fibres to the trigeminus, these passing to the median line, to theraphe, then through the posterior longitudinal fasciculus, most ofthem reaching the motor branch of the tr
Size: 1614px × 1548px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, bookidtreatiseonnervou00gray
