﻿Dr. 
  D. 
  Ferrier 
  on 
  the 
  Brain 
  of 
  Monkeys. 
  

  

  409 
  

  

  " 
  Experiments 
  on 
  the 
  Brain 
  of 
  Monkeys. 
  — 
  No. 
  1J* 
  By 
  David 
  

   Ferrier, 
  M.A., 
  M.D., 
  M.B.C.P., 
  Professor 
  of 
  Forensic 
  Medi- 
  

   cine, 
  King's 
  College, 
  London. 
  Communicated 
  by 
  Dr. 
  J. 
  B, 
  

   Sanderson, 
  F.E.S. 
  

  

  The 
  facts 
  recorded 
  in 
  this 
  paper 
  are 
  the 
  results 
  obtained 
  by 
  electrical 
  

   stimulation 
  of 
  the 
  brain 
  of 
  monkeys, 
  after 
  the 
  method 
  described 
  by 
  the 
  

   author 
  in 
  the 
  "West 
  Eiding 
  Lunatic 
  AsylumMedical 
  Eeports,yol. 
  iii. 
  1873. 
  

   They 
  formed 
  part 
  of 
  a 
  paper 
  " 
  On 
  the 
  Localization 
  of 
  Function 
  in 
  the 
  

   Brain," 
  read 
  before 
  the 
  Eoyal 
  Society 
  on 
  March 
  5, 
  1874*. 
  This 
  memoir 
  

   also 
  contained 
  the 
  results 
  of 
  other 
  experiments 
  on 
  the 
  brain 
  of 
  monkeys, 
  

   chiefly 
  relating 
  to 
  the 
  effects 
  of 
  localized 
  lesions 
  of 
  several 
  parts 
  of 
  the 
  

   hemispheres, 
  with 
  a 
  view 
  to 
  determine 
  the 
  significance, 
  as 
  regards 
  sensa- 
  

   tion 
  and 
  motion, 
  of 
  the 
  phenomena 
  caused 
  by 
  electrical 
  irritation. 
  These 
  

   experiments 
  are 
  not 
  here 
  recorded, 
  but 
  are 
  reserved 
  for 
  comparison 
  with 
  

   the 
  results 
  of 
  a 
  more 
  extended 
  reinvestigation 
  of 
  a 
  similar 
  nature, 
  on 
  

   which 
  the 
  author 
  has 
  been 
  for 
  some 
  time 
  engaged, 
  and 
  which 
  will 
  shortly 
  

   be 
  laid 
  before 
  the 
  Society. 
  

  

  In 
  order 
  to 
  avoid 
  unnecessary 
  detail, 
  and 
  in 
  order 
  to 
  place 
  the 
  results 
  

   together 
  for 
  the 
  purposes 
  of 
  comparison, 
  the 
  animals 
  experimented 
  on 
  

   are 
  described, 
  the 
  dates 
  of 
  experiment 
  given, 
  and 
  numbers 
  assigned 
  to 
  

   them, 
  so 
  that 
  they 
  may 
  all 
  be 
  brought 
  into 
  relation 
  with 
  each 
  other 
  : 
  — 
  

  

  Experiments 
  on 
  

  

  Monkeys 
  (Macaques). 
  

  

  I. 
  Left 
  hemisphere 
  . 
  

  

  June 
  14, 
  1873. 
  

  

  II. 
  Eight 
  „ 
  

  

  

  III. 
  Left 
  

  

  

  IV. 
  Left 
  

  

  

  V. 
  Left 
  

  

  

  VL 
  Eight 
  „ 
  

  

  July 
  4, 
  „ 
  

  

  kVII. 
  Left 
  

  

  July 
  16, 
  „ 
  

  

  VIII. 
  Left 
  

  

  July 
  22, 
  „ 
  

  

  IX. 
  Eight 
  „ 
  

  

  • 
  July 
  25, 
  „ 
  

  

  X. 
  Eight 
  „ 
  

  

  Aug. 
  1, 
  „ 
  

  

  XI. 
  Left 
  

  

  Aug. 
  8, 
  ,, 
  

  

  XII. 
  Eight 
  „ 
  

  

  Aug. 
  23, 
  „ 
  

  

  XIII. 
  Eight 
  „ 
  

  

  

  The 
  circles 
  marked 
  on 
  the 
  woodcuts 
  indicate 
  the 
  regions 
  stimulation 
  of 
  

   which 
  is 
  followed 
  by 
  the 
  same 
  results. 
  Several 
  applications 
  of 
  the 
  elec- 
  

   trodes 
  (which 
  do 
  not 
  cover 
  a 
  larger 
  diameter 
  than 
  a 
  quarter 
  of 
  an 
  inch) 
  

   in 
  or 
  near 
  the 
  same 
  region 
  are 
  necessary 
  to 
  mark 
  off 
  the 
  area. 
  To 
  

   exactly 
  define 
  it 
  is 
  hardly 
  possible, 
  as 
  the 
  areas 
  overlap 
  each 
  other, 
  so 
  

   that 
  a 
  complex 
  set 
  of 
  movements 
  may 
  be 
  caused 
  by 
  the 
  conjoint 
  stimula- 
  

   * 
  See 
  Proceedings, 
  vol. 
  xxii. 
  p. 
  229. 
  

  

  