﻿Dr. 
  D. 
  Ferrier 
  on 
  the 
  Brain 
  of 
  Monkeys. 
  

  

  419 
  

  

  This 
  action 
  of 
  the 
  mouth 
  will 
  be 
  explained 
  by 
  reference 
  to 
  the 
  

   action 
  of 
  the 
  centre 
  immediately 
  below 
  it. 
  

  

  II. 
  Supination 
  and 
  flexion 
  of 
  the 
  forearm 
  and 
  hand. 
  

  

  III. 
  A 
  similar 
  result. 
  

  

  IV. 
  Flexion 
  of 
  the 
  forearm, 
  clenching 
  and 
  supination 
  of 
  the 
  hand. 
  

  

  V. 
  Shoulder 
  raised, 
  forearm 
  firmly 
  flexed, 
  hand 
  clenched 
  and 
  supi- 
  

  

  nated. 
  The 
  hand 
  ultimately 
  raised 
  to 
  the 
  mouth, 
  the 
  angle 
  of 
  

   which 
  is 
  retracted 
  and 
  elevated. 
  

  

  VI. 
  Flexion, 
  with 
  slight 
  supination, 
  of 
  the 
  forearm 
  and 
  hand. 
  

  

  VII. 
  Flexion 
  and 
  supination 
  of 
  the 
  right 
  forearm 
  and 
  hand, 
  accom- 
  

   panied 
  with 
  clenching 
  of 
  the 
  fist 
  when 
  the 
  stimulation 
  was 
  applied 
  

   near 
  the 
  fissure 
  of 
  Rolando. 
  

  

  VIII. 
  Apparent 
  action 
  of 
  the 
  biceps 
  as 
  before. 
  

  

  IX. 
  Flexion 
  and 
  supination 
  of 
  the 
  forearm 
  and 
  hand. 
  

  

  In 
  this 
  case 
  it 
  was 
  found 
  very 
  decidedly 
  that 
  stimulation 
  close 
  

   to 
  the 
  fissure-of-Rolando 
  side 
  of 
  the 
  convolution 
  caused 
  the 
  action 
  

   of 
  the 
  biceps 
  to 
  be 
  associated 
  with 
  clenching 
  of 
  the 
  fist. 
  Towards 
  

   the 
  lower 
  margin 
  of 
  the 
  circle 
  the 
  same 
  movements 
  were 
  asso- 
  

   ciated 
  with 
  retraction 
  of 
  the 
  angle 
  of 
  the 
  mouth. 
  

  

  X. 
  Not 
  explored. 
  

  

  XI. 
  Same 
  results 
  as 
  IX. 
  exactly. 
  

  

  XII. 
  Not 
  explored. 
  

  

  XIII. 
  Eesults 
  as 
  in 
  other 
  cases, 
  viz. 
  flexion 
  and 
  supination 
  of 
  forearm 
  

   and 
  hand, 
  with 
  clenching 
  of 
  the 
  fist. 
  

  

  These 
  uniform 
  results 
  point 
  very 
  clearly 
  to 
  this 
  as 
  the 
  centre 
  for 
  the 
  

   biceps 
  and 
  muscles 
  concerned 
  in 
  bringing 
  the 
  hand 
  up 
  to 
  the 
  mouth. 
  

  

  Circle 
  ( 
  7 
  ), 
  figs. 
  1 
  & 
  2. 
  Still 
  in 
  the 
  ascending 
  frontal 
  convolution, 
  

  

  I. 
  Retraction 
  and 
  elevation 
  of 
  the 
  right 
  angle 
  of 
  the 
  mouth. 
  

  

  II. 
  Eetraction 
  (with 
  elevation) 
  of 
  left 
  angle 
  of 
  the 
  mouth. 
  Occa- 
  

  

  sionally 
  in 
  stimulation 
  the 
  action 
  was 
  conjoined 
  with 
  that 
  of 
  the 
  

   biceps. 
  

  

  III. 
  Not 
  explored. 
  

  

  IV. 
  Not 
  explored. 
  

  

  V. 
  Spasm 
  of 
  the 
  right 
  angle 
  of 
  the 
  mouth 
  and 
  of 
  the 
  cheek-pouch. 
  

  

  VI. 
  Not 
  explored. 
  

  

  VII. 
  Elevation 
  of 
  right 
  angle 
  of 
  mouth. 
  

  

  VIII. 
  Same 
  result 
  as 
  VII. 
  

  

  IX. 
  Angle 
  of 
  the 
  mouth 
  raised 
  and 
  retracted, 
  along 
  with 
  action 
  of 
  the 
  

   biceps 
  and 
  flexors 
  of 
  the 
  fingers. 
  

  

  X. 
  A 
  similar 
  result. 
  In 
  this 
  case, 
  after 
  several 
  other 
  parts 
  had 
  been 
  

  

  under 
  exploration, 
  excitation 
  of 
  this 
  region 
  gave 
  rise 
  to 
  a 
  species 
  

  

  VOL. 
  XXIIT, 
  2 
  Tv 
  

  

  in 
  position 
  immediately 
  below 
  the 
  centre 
  for 
  the 
  biceps. 
  

  

  