﻿Dr. 
  D. 
  Ferrier 
  on 
  the 
  Brain 
  of 
  Monkeys. 
  

  

  4r29 
  

  

  Results 
  : 
  — 
  

  

  VIII. 
  Left 
  corpus 
  striatum. 
  

  

  Stimulation 
  caused 
  bending 
  of 
  the 
  body 
  to 
  the 
  right 
  (pleurostho- 
  

   tonus) 
  and 
  rigidity 
  of 
  the 
  limbs 
  in 
  the 
  position 
  of 
  flexion. 
  

   XIII. 
  Bight 
  corpus 
  striatum. 
  

  

  Curving 
  of 
  the 
  head 
  and 
  trunk 
  to 
  the 
  left, 
  the 
  platysma 
  being 
  

   strongly 
  in 
  action, 
  while 
  the 
  limbs 
  were 
  maintained 
  in 
  a 
  rigid 
  con- 
  

   dition 
  in 
  the 
  position 
  of 
  flexion. 
  

   The 
  results 
  indicated 
  that 
  all 
  the 
  muscles 
  were 
  simultaneously 
  in 
  

   action, 
  individually 
  stimulated 
  by 
  irritation 
  of 
  the 
  cortical 
  centres. 
  

  

  Optic 
  thalamus. 
  

  

  Stimulated 
  in 
  VIII. 
  and 
  XIII. 
  Results 
  : 
  — 
  ■ 
  

  

  IX. 
  Entirely 
  negative. 
  

  

  XIII. 
  Also 
  negative 
  after 
  several 
  explorations 
  of 
  the 
  upper 
  surface. 
  

  

  Application 
  of 
  the 
  electrodes 
  to 
  the 
  inner 
  aspect 
  in 
  the 
  region 
  of 
  the 
  

   soft 
  commissure 
  caused 
  a 
  spasmodic 
  extension 
  of 
  the 
  limbs. 
  There 
  was 
  

   no 
  cry 
  of 
  pain. 
  The 
  result 
  was 
  not 
  constant, 
  and 
  it 
  may 
  therefore 
  have 
  

   been 
  an 
  accidental 
  complication. 
  

  

  No 
  other 
  experiments 
  were 
  made 
  on 
  these 
  ganglia 
  in 
  the 
  monkey, 
  

   on 
  account 
  of 
  their 
  resemblance 
  to 
  the 
  results 
  obtained 
  on 
  other 
  animals. 
  

  

  Corpora 
  quadrigemina. 
  

  

  These 
  ganglia 
  were 
  subjected 
  to 
  experimentation 
  in 
  the 
  following 
  seven 
  

   cases, 
  viz. 
  V., 
  VI., 
  VHL, 
  IX., 
  X., 
  XII., 
  XIII., 
  with 
  the 
  results 
  :— 
  

  

  V. 
  In 
  this 
  case 
  the 
  exploration 
  was 
  not 
  sufficiently 
  definite, 
  as 
  the 
  

  

  exact 
  position 
  of 
  the 
  electrodes 
  was 
  not 
  observed, 
  and 
  death 
  

   occurred 
  before 
  a 
  more 
  careful 
  exploration 
  could 
  be 
  made. 
  

  

  The 
  application 
  of 
  the 
  electrodes 
  to 
  the 
  ganglia 
  on 
  the 
  left 
  side 
  

   (position 
  as 
  to 
  the 
  testes 
  or 
  nates 
  not 
  ascertained) 
  caused 
  the 
  

   animal 
  to 
  utter 
  various 
  barking, 
  howling, 
  or 
  screaming 
  sounds 
  of 
  

   an 
  incongruous 
  character. 
  

  

  The 
  head 
  was 
  drawn 
  back 
  and 
  to 
  the 
  right, 
  and 
  the 
  right 
  angle 
  

   of 
  the 
  mouth 
  was 
  strongly 
  retracted 
  while 
  the 
  stimulation 
  was 
  

   kept 
  up. 
  The 
  tail 
  was 
  raised 
  and 
  the 
  limbs 
  were 
  thrown 
  into 
  

   contortions, 
  but 
  nothing 
  further 
  was 
  ascertained, 
  as 
  the 
  animal 
  

   died 
  from 
  haemorrhage. 
  

  

  VI. 
  In 
  this 
  case 
  irritation 
  of 
  the 
  right 
  anterior 
  tubercle 
  (nates) 
  caused 
  

   intense 
  dilatation 
  of 
  both 
  pupils 
  (especially 
  beginning 
  in 
  the 
  left), 
  

   elevation 
  of 
  the 
  eyebrows, 
  and 
  turning 
  of 
  the 
  eyeballs 
  upwards 
  

   and 
  to 
  the 
  left, 
  at 
  the 
  same 
  time 
  that 
  the 
  head 
  was 
  turned 
  in 
  the 
  

   same 
  direction 
  with 
  an 
  intensely 
  pathetic 
  expression. 
  

  

  Momentary 
  application 
  of 
  the 
  electrodes 
  to 
  the 
  posterior 
  tuber- 
  

   cles 
  (testes) 
  caused 
  the 
  animal 
  to 
  bark 
  loudly, 
  the 
  sound 
  passing 
  

   with 
  longer 
  stimulation 
  into 
  every 
  conceivable 
  variation 
  of 
  howl- 
  

   ing 
  and 
  screaming. 
  

  

  