584 WILL AND 



the monkey the resemblance fails, for in these there 13 

 complete motor paralysis, with distinct retention of the 

 pristine sensibility to the various forms of cutaneous 

 stimulations. The argument from mere resemblance is 

 thus seen to fail when a wider comparison of instances is 

 made. But, further, it has been shown that the condition 

 which may with truth be described as loss of muscular 

 sense or of muscle-consciousness is dependent on lesion 

 of a totally different part of the brain, viz., the hippocam- 

 pal region, or centre of tactile consciousness."* 



These objections of Ferrier to the views of Nothnagel 

 and Hitzig do not seem to us to have nearly as much 

 cogency as he supposes. Our knowledge in regard to 

 several of the points touched upon by him is far from 

 complete, but the evidence at present in our possession may 

 be interpreted quite differently. Thus, the observations of 

 Landry, as well as the case of Demaux f when contrasted 

 with that of ordinary hemi-an^esthetic patients, make it 

 probable that unconscious * muscular sense ' impressions, 

 in the restricted sense of that term, have a distinct exist- 

 ence, and probably a cerebral ' locus ' of their own, quite 

 apart from Tactile Impressions, whatever may be the region 

 of the Cortex to which the latter are specially distributed. 

 The paths for these two classes of Impressions, viz., those 

 from Muscles and those from Skin, seem to be topo- 

 graphically distinct in the Spinal Cord ; they are probably 

 more or less contiguous in the Cerebral Peduncles ; whilst 

 they may subsequently diverge again and go to different, 

 though functionally related. Cerebral Convolutions, rather 

 than to the same cerebral region as Ferrier seems to sup- 

 pose {see p. 544). 



The Cerebral Cortex is, in our view, to be regarded as a 

 continuous aggregation of interlaced ' centres,' towards which 

 * Loc. cit. p, 218. t See Appendix, p. 700. 



