RT Book, Section
A1 Ropper, Allan H.
A1 Samuels, Martin A.
A1 Klein, Joshua P.
A1 Prasad, Sashank
SR Print(0)
ID 1162601619
T1 Disorders of Motility: Introduction
T2 Adams and Victor's Principles of Neurology, 11e
YR 2019
FD 2019
PB McGraw-Hill Education
PP New York, NY
SN 9780071842617
LK neurology.mhmedical.com/content.aspx?aid=1162601619
RD 2024/04/25
AB The  control  of  motor  function,  to  which  much  of  the  human  nervous  system  is  committed,  is  accomplished  through  the  integrated  action  of  a  vast  array  of  segmental  and  suprasegmental  motor  neurons.  As  originally  conceived  by  Hughlings  Jackson  in  1858,  purely  on  the  basis  of  clinical  observations,  the  motor  system  is  organized  hierarchically  in  three  levels,  each  higher  level  controlling  the  one  below.  It  was  Jackson’s  concept  that  the  spinal  and  brainstem  neurons  represent  the  lowest,  simplest,  and  most  highly  organized  motor  centers;  that  the  motor  neurons  of  the  posterior  frontal  region  represent  a  more  complex  and  less  closely  organized  second  motor  center;  and  that  the  prefrontal  parts  of  the  cerebrum  are  the  third  and  highest  motor  center.  This  scheme  is  still  regarded  as  being  essentially  correct,  although  since  Jackson’s  time  the  importance  of  the  parietal  lobe  and  basal  ganglia  in  motor  control  has  been  recognized.