﻿Dr. 
  D. 
  Ferrier 
  on 
  the 
  Brain 
  of 
  Monkeys. 
  

  

  413 
  

  

  semiflexed 
  condition, 
  and 
  pointing 
  to 
  the 
  middle 
  line 
  of 
  the 
  

   body. 
  

  

  The 
  combination 
  of 
  actions 
  is 
  just 
  such 
  as 
  when 
  a 
  monkey 
  

   scratches 
  its 
  abdomen 
  with 
  its 
  hind 
  leg. 
  

  

  The 
  muscles 
  of 
  the 
  trunk 
  participated 
  in 
  the 
  movements, 
  so 
  

   that 
  the 
  body 
  was 
  twisted 
  to 
  the 
  opposite 
  side. 
  

  

  III. 
  The 
  action 
  in 
  this 
  case 
  was 
  in 
  all 
  respects 
  similar 
  to 
  that 
  recorded 
  

   in 
  II. 
  

  

  IV. 
  In 
  this 
  case 
  epileptic 
  or 
  choreic 
  convulsions, 
  which 
  readily 
  occurred 
  

   on 
  the 
  slightest 
  stimulation, 
  rendered 
  analysis 
  of 
  the 
  movements 
  

   impossible. 
  

  

  Y. 
  In 
  this 
  case 
  the 
  action 
  described 
  in 
  II. 
  was 
  very 
  distinct, 
  viz. 
  the 
  

   rotation 
  outwards 
  of 
  the 
  thigh, 
  the 
  rotation 
  inwards 
  of 
  the 
  leg 
  

   and 
  foot, 
  and 
  the 
  grasping 
  portion 
  of 
  the 
  toes 
  pointing 
  towards 
  

   the 
  middle 
  line. 
  

  

  VI. 
  As 
  in 
  I. 
  and 
  V., 
  the 
  thigh 
  on 
  the 
  opposite 
  side 
  (left) 
  was 
  flexed 
  

   and 
  rotated 
  outwards, 
  the 
  leg 
  and 
  foot 
  inwards, 
  while 
  the 
  toes 
  

   were 
  spread 
  out. 
  

  

  VII. 
  In 
  this 
  case 
  also 
  the 
  movements 
  were 
  very 
  distinct, 
  consisting 
  in 
  

   rapid 
  combined 
  muscular 
  action, 
  bringing 
  the 
  foot 
  and 
  toes 
  inward 
  

   as 
  if 
  to 
  scratch 
  the 
  body. 
  

  

  VIII. 
  The 
  results 
  in 
  all 
  respects 
  the 
  same 
  as 
  VII. 
  

  

  IX. 
  Similar 
  action, 
  viz. 
  rotation 
  outwards 
  of 
  the 
  thigh, 
  inwards 
  of 
  the 
  

   leg, 
  and 
  the 
  foot 
  brought 
  up 
  with 
  a 
  sort 
  of 
  grasping 
  movement 
  of 
  

   the 
  toes 
  to 
  the 
  middle 
  line 
  of 
  the 
  trunk. 
  

  

  X. 
  Not 
  explored. 
  

  

  XI. 
  Action 
  in 
  all 
  respects 
  as 
  described 
  in 
  IX. 
  

  

  XII. 
  Not 
  explored. 
  

  

  XIII. 
  Not 
  explored. 
  

  

  Circle 
  n 
  g 
  s 
  « 
  1 
  & 
  2, 
  corresponding 
  to 
  the 
  situation 
  of 
  a 
  parallel 
  

  

  sulcus 
  in 
  the 
  upper 
  part 
  of 
  the 
  ascending 
  frontal 
  convolution. 
  

  

  It 
  may 
  be 
  taken 
  as 
  included 
  in 
  the 
  previous 
  one, 
  but 
  is 
  marked 
  sepa- 
  

   rately 
  on 
  account 
  of 
  being 
  also 
  a 
  centre 
  for 
  the 
  tail. 
  

  

  Eesults 
  of 
  stimulation 
  : 
  — 
  

  

  I. 
  Twisting 
  of 
  the 
  trunk 
  to 
  the 
  left, 
  along 
  with 
  some 
  not 
  well-defined 
  

  

  movements 
  of 
  the 
  right 
  leg 
  and 
  tail. 
  

  

  II. 
  In 
  this 
  case 
  the 
  same 
  action 
  was 
  observed 
  as 
  resulting 
  from 
  stimu- 
  

  

  lation 
  of 
  circle 
  viz. 
  flexion 
  of 
  thigh, 
  rotation 
  outwards, 
  leg 
  

  

  and 
  foot 
  rotated 
  inwards, 
  with 
  the 
  toes 
  stretched 
  out, 
  semiflexed 
  

   towards 
  the 
  middle 
  line 
  of 
  the 
  body. 
  Movement 
  of 
  the 
  tail 
  was 
  

   not 
  noted. 
  

  

  III. 
  Similar 
  action. 
  Tail 
  not 
  noted. 
  

  

  