64 LABORATORY OUTLINE OF NEUROLOGY 



68. (a) Locate with the aid of the reference books the course 

 of the exteroceptive spinal lemniscus tracts for touch, tempera- 

 ture, and pain, and of the proprioceptive systems (dorsal funiculi 

 and spino-cerebellar tracts). See Herrick ('15), Chapter VIII, 

 and especially Figs. 59, 63, and 64; on the general somatic sys- 

 tems Chapter XI should also be read in this connection. 



(b) If pathological preparations illustrating degenerations of 

 spinal cord tracts are available, these should be studied at this 

 time. Consult the larger text-books of neurology, and especially 

 those of neuropathology. (Later sections relating to the tracts 

 of the brain may be illustrated in the same way in any cases 

 where pathological microscopic preparations are available.) 



(c) Valuable information regarding the courses of the fiber 

 tracts of the cord and brain has been gained by embryological 

 methods. Some functional systems of fiber tracts mature earlier 

 than others. Fetal spinal cords of man, pig, or any other mam- 

 mal taken at successive periods from the age when myelinated 

 fibers first appear up to birth and stained by the Weigert method 

 will demonstrate the sequence of myelination of the spinal 

 tracts. See Barker ('01), pp. 424-437; His ('04). 



5. Sympathetic Nervous System 



69. At this time the student should consult his reference 

 books and so become familiar with the general pattern of the 

 sympathetic nervous system and its relations with the cerebro- 

 spinal system. The sympathetic trunk and its connections 

 with the spinal nerves have already been seen (Section 41). 

 The following references are suggested: Cunningham ('15), pp. 

 679-682, 753-767; Herrick ('15), Chap. XVI; Howell ('15), 

 Chap. XII; Huber ('97); Johnston ('06), Chap. XII; Langley 

 ('00, '00a, and '03); Luciani ('15), Vol. Ill, Chap. VI, pp. 359- 

 378; Morris ('14), pp. 1026-1047; Piersol ('13), pp. 1353-1375; 

 Quain ('09), pp. 1-3, 13-20; Sheldon ('18), Chaps. VI and 

 XXVII; Starling ('12), pp. 520-552; Stewart ('14), pp. 963-965. 



6. The Medulla Oblongata 



70. The somatic sensory systems. — (a) Here familiarize your- 

 self from the reference books with the somatic sensory nerve- 



