﻿Dr. 
  D. 
  Ferrier 
  on 
  the 
  Brain 
  of 
  Monkeys. 
  

  

  411 
  

  

  Circle 
  Ql^)> 
  % 
  s 
  - 
  1 
  % 
  corresponding 
  to 
  the 
  postero-parietal 
  lobule, 
  

  

  or 
  superior 
  extremity 
  of 
  the 
  ascending 
  parietal 
  convolution. 
  The 
  region 
  is 
  

   embraced 
  between 
  the 
  parieto-occipital 
  fissure 
  and 
  a 
  short 
  perpendicular 
  

   sulcus 
  at 
  right 
  angles 
  to 
  the 
  median 
  fissure. 
  

  

  Results 
  of 
  stimulation 
  : 
  — 
  

  

  I. 
  Not 
  explored. 
  

  

  II. 
  The 
  left 
  foot 
  is 
  flexed 
  on 
  the 
  ]eg, 
  and 
  the 
  toes 
  are 
  spread 
  out 
  and 
  

  

  extended. 
  

  

  III. 
  The 
  right 
  thigh 
  is 
  slightly 
  flexed 
  on 
  the 
  pelvis, 
  the 
  leg 
  is 
  extended, 
  

   the 
  foot 
  flexed 
  on 
  the 
  leg, 
  and 
  the 
  toes 
  are 
  extended. 
  

  

  This 
  result 
  was 
  obtained 
  by 
  stimulation 
  of 
  the 
  posterior 
  margin 
  

   of 
  the 
  circle. 
  At 
  other 
  points 
  the 
  advance 
  of 
  the 
  whole 
  limb 
  was 
  

   not 
  so 
  distinct, 
  but 
  the 
  flexion 
  of 
  the 
  foot 
  and 
  extension 
  of 
  the 
  

   toes 
  was 
  very 
  marked. 
  

   IY. 
  The 
  right 
  leg 
  is 
  advanced, 
  the 
  foot 
  flexed, 
  and 
  the 
  toes 
  extended. 
  

   In 
  this 
  case 
  some 
  movements 
  of 
  the 
  arm 
  were 
  also 
  made, 
  but 
  

   not 
  of 
  a 
  constant 
  nature, 
  and 
  were 
  therefore 
  regarded 
  as 
  accidental 
  

   complications. 
  

  

  V. 
  The 
  right 
  thigh 
  is 
  flexed 
  on 
  the 
  pelvis, 
  the 
  leg 
  extended, 
  the 
  foot 
  

  

  flexed 
  on 
  the 
  ankle, 
  and 
  the 
  toes 
  extended. 
  

  

  VI. 
  Flexion 
  of 
  the 
  left 
  thigh 
  on 
  the 
  pelvis, 
  extension 
  of 
  the 
  leg, 
  

   flexion 
  of 
  the 
  foot 
  on 
  the 
  ankle, 
  extension 
  and 
  spreading 
  out 
  of 
  

   the 
  toes. 
  

  

  VII. 
  The 
  right 
  hind 
  leg 
  is 
  advanced 
  as 
  in 
  walking, 
  the 
  foot 
  flexed 
  on 
  

   the 
  ankle, 
  and 
  the 
  toes 
  extended. 
  

  

  In 
  this 
  case 
  slight 
  adduction 
  of 
  the 
  foot 
  was 
  observed 
  on 
  stimu- 
  

   lation, 
  just 
  posterior 
  to 
  the 
  lower 
  end 
  of 
  the 
  short 
  perpendicular 
  

   sulcus 
  already 
  referred 
  to. 
  

  

  VIII. 
  Extension 
  of 
  the 
  toes 
  of 
  the 
  right 
  foot, 
  and 
  flexion 
  of 
  the 
  foot 
  

   on 
  the 
  ankle. 
  

  

  In 
  this 
  case 
  also 
  a 
  tendency 
  to 
  adduction 
  of 
  the 
  leg 
  and 
  foot 
  

   was 
  observed. 
  

  

  IX. 
  Flexion 
  of 
  left 
  thigh 
  on 
  pelvis, 
  extension 
  of 
  the 
  toes, 
  and 
  flexion 
  of 
  

   the 
  floot. 
  (One 
  observation 
  only.) 
  

  

  X. 
  Not 
  explored. 
  

  

  XI. 
  Extension 
  of 
  the 
  toes 
  of 
  the 
  right 
  foot, 
  and 
  flexion 
  of 
  the 
  foot 
  on 
  

   the 
  ankle. 
  

  

  XII. 
  Not 
  explored. 
  

  

  XIII. 
  Not 
  explored. 
  

  

  The 
  general 
  result 
  of 
  stimulation 
  of 
  this 
  region 
  is 
  to 
  show 
  that 
  it 
  is 
  a 
  

   centre 
  for 
  the 
  movements 
  of 
  the 
  hind 
  leg, 
  and 
  apparently 
  those 
  concerned 
  

   in 
  walking. 
  

  

  