98 LABORATORY OUTLINE OF NEUROLOGY 



be consulted: Barker ('01), Fig. 657, p. 1037; Cunningham ('15), 

 Fig. 588, p. 660, Fig. 591, p. 663, also see references under 

 Section 114; Cushing ('08) and ('09); Edinger ('93); Edinger 

 and Fischer ('13); Flechsig ('96); Herrick ('15), Figs. 132-135; 

 Howell ('15), Figs. 86-88, pp. 195-197, Fig. 97, p. 222, Figs. 

 98-101, pp. 227, 228, also discussions in Chap. IX, pp. 192-201, 

 and Chap. X; Monakow ('14); Morris ('14), Fig. 703, p. 892, 

 Fig. 704, p. 894; Villiger ('12), Figs. 118-122, and discussion pp. 

 123-130. 



117. Gross structure of the cerebral cortex. — Remove a small 

 rectangular block containing about one square centimeter of 

 cortex from each of the following centers of the human cerebral 

 cortex: visual, auditory, tactile, motor, prefrontal. Cut each 

 block so as to exhibit a section through the cortex strictly 

 perpendicular to the surface and observe with a lens the details 

 of the lamination of the gray and white substance within the 

 cortex. These distinctions are visible only in well-preserved 

 material; cf. Cunningham ('15), pp. 644-647; Herrick ('15), 

 Fig. 122; Quain ('09), Vol. 3, pp. 372, 373, and Elliot Smith 

 ('07). 



118. Microscopic structure of the cerebral cortex. — Study the 

 microscopic sections of the cerebral cortex supplied and note 

 particularly the differences in the lamination of the cells and 

 fibers in the different regions. See Bailey ('16), pp. 542-549; 

 Barker ('01), Figs. 655, 656, pp. 1034, 1035; Bolton and Moves 

 ('12); Brodmann ('07); Campbell ('05); Cunningham ('15), 

 Fig. 574, p. 645, and also the references under Sections 114 and 

 115; Herrick ('15), Chap. XIX; Howell ('15), pp. 183-189; 

 Villiger ('12), pp. 114-118. 



119. Association tracts of the sheep. — Now in the sheep's 

 brain by careful teasing examine the arrangement of fibers in 

 the subcortical white matter. Only a part of these fibers are 

 to be studied at this time, and the dissection outlined in this 

 section should not be carried farther than directed. It will 

 require but a short time. 



(1) First, along the dorsal border of the medial surface of 

 the hemisphere scrape away the gray matter covering two ad- 

 jacent gyri. This will bring into view the short associational 

 (arcuate) fibers connecting these gyri. Further teasing will 



