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spinal  iierve  (d)  low  down  to  the  left.  The  otliers  are  intact  sjm- 
pathetic  nerves,  tliat  pass  awaj  vvith  the  formation  of  loops  and 
varicosities  along  the  miiscle  tibres  {a  and  aj)  or  o\’er  and  across 
these  (a).  I could  not  show  anj  terminal  loops  or  other  connections 
with  the  interior  of  the  innscle  fibi’es  in  this  preparation  in  the  case 
of  the  nerve  fibres  a.  The  nerve  fibres  aj,  on  the  other  hand,  end 
in  a terminal  plate  with  rather  abundant  ramification.  In  this, 
as  is  shown  by  the  tignre,  the  different  nerve  fibres  come  to  an  end 
with  almost  circnlar  terminal  loops.  At  a couple  of  [ilaces  in  this 
plate  there  appeared  a connection  hetween  the  coarser  nenrofibril 
net  and  a peri-terminal  network,  which  of  conrse  is  in  favour  of  a 
hypo-lemmal  position  tbr  the  sympathetic  plate.  This  sympalhetic 
terminal  plate  [aj)  is  rather  remarkable.  lts  great  extension  and  its 
abundant  nenro-übrillar  ramifications  might  easily  lead  one  to  snppose 
that  we  are  concerned  here  with  an  ordinary  motor  terminal  plate. 
That  this  is,  ho wever,  not  the  case  is  shown,  first,  by  the  slender 
non-medullated  nerve-fibre,  aj,  which  can  be  followed  in  sexeral 
preparations  (as  the  pre[)aration  belongs  to  a continuons  series)  and 
secondly  by  the  fact  that  (he  nerve  is  intact  after  the  operation 
mentioned  above  and  after  a long  period  of  degeneration. 
The  preparation  from  which  figiire  4 is  drawn  shows,  among 
other  things,  a mnscle  tibre  with  a degenerated  motor  terminal 
plate  and  a short  distance  (less  than  the  length  of  the  plate  in 
question)  from  it  another  terminal  plate  of  a nerve.  This  last  ter- 
minal plate  must  conseqnently  be  of  a sympathetic  character  to  the 
preceding  one.  It  is  certain  that  the  two  terminal  plates  are  situated 
on  the  same  mnscle  tibre.  We  see  here  the  interesting  fact  that 
two  terminal  plates  of  nerves,  d motor  one  and  a si^mpathetic  one, 
the  former  degenerated  and  the  latter  intact,  and  the  sympathetic 
terminal  plate  having  also  a great  extension  on  the  mnscle  fibre, 
are  sitnated  on  the  same  mnscle  tibre  and  are  at  a distance  from 
each  other  snch  as  one  finds  bet  ween  the  motor  terminal  plates  in 
a spinal  plnri-segmental  innervation  of  the  separate  mnscle  tibres  ')• 
In  my  opinion,  howevei',  it  is  as  a rnle  easy  to  distingnish,  even 
in  preparations  where  all  the  nerves  are  intact,  hetween  motor  and 
sympathetic  terminal  plates  of  nerves  and  thns  to  decide,  when 
several  terminal  plates  of  nerves  occnr  on  the  same  mnscle  fibre, 
b Erik  Agdur;  Morphologischer  Beweis  der  doppelten  (plurisegmentalen)  moto- 
rischen  Innervation  der  einzelnen  quergestreiften  Muskelfasern  bei  den  Saugetieren. 
Anat.  Anz.  Bd.  49.  1916. 
Erik  Agdur  ; Ueber  die  plurisegmentellen  Innervation  der  einzelnen  querge- 
streiften Muskelfasern.  Anat.  Anz.  Bd.  50,  1919. 
