Chap. XXIIL] 



OF THE HUxMAN BRAIN. 



431 



fibres which pass from the Spinal Cord into the Brain, 

 and vice versa. The laborious investigations of Stilling, 

 Lockhart Clarke, Meynert and others in regard to the 

 intimate structure of the Medulla, valuable as they are, 

 will be but little referred to here, because they have 

 revealed details far too 

 complex and technical to 

 be now set forth, and also 

 because a statement of 

 the general arrangement 

 of its principal parts will 

 be all that is really need- 

 ful for the carrying out of 

 our present plan. 



The intimate structure 

 and distribution of fibres 

 in higher parts of the 

 Brain is a study of no 

 less extreme difficulty, 

 w4iich in recent years has 

 been dealt with principally 



±. T Fig. 152.— Third and Fourth Ventricles of 



by Meynert, LuyS and the Brain exposed by removal of the ' velum 



interpositum ' and further cutting away of 

 Cerebr^il Hemispheres and portions of Cers- 

 belhmi. (After Sharpey.) a, Corpus stria- 

 tum ; b, Thalamus ; c, anterior pillars of 

 Fornix ; d, soft or ' nmiddle commissure ' 

 stretching across third ventricle ; e, Pineal 

 body; /, /, Corpora quadrigemina ; g, g, 

 01 superior Cerebellar Peduncle with {h) part of 

 the 'valve of Vieussens' lyingbetweenthem 

 and forming the roof of (4) the fourth ven- 

 tricle. 



Broadbent. Concerning 

 many points these ob- 

 servers are far from being 

 an- 



in accord with one 

 other. The views 

 Meynert on this difficult 

 subject, have of late re- 

 ceived what they much 



needed in the way of re-arrangement and clearer exposi- 

 tion from Professor Huguenin of Zurich, and the value of 

 his work has been further enhanced in its French transla- 

 tion by the incorporation of new matter contributed by its 



