the neurons in abdominal ganglion , which by their activity exert control over the pns and thus the reflex , have not yet been identified but it is known that these same neutrons apparently exert control over the synaptic input received by gill motor neurons such as l7 from the central sensory neurons ( byrne , castellucci , and kandel , 1974 ) as a result of siphon stimulation ( peretz and lukowiak , 1975 ; lukowiak and peretz , 1980 ) .
C0206417
pns
C0026609
motor neurons