Schwarz M, Markovich S, Susswein A J
Department of Life Sciences, Bar-Ilan University, Ramat Gan, Israel.
Behav Neurosci. 1988 Feb;102(1):124-33. doi: 10.1037//0735-7044.102.1.124.
In order to determine whether different classes of behavioral plasticity affect common or unique neural loci, the effects of three types of processes that inhibit feeding in Aplysia were quantified. Changes in feeding behavior due to an associative learning task in which animals learn that food is inedible were compared with behavioral effects caused by satiation and by sustained lip stimulation. The data indicate that each process modifying feeding can be characterized by differences in time to stop responding to food, by differences in specificity of the decrement to a particular food, and by different patterns of motor output before complete cessation of responsiveness. The data suggest each process inhibiting feeding acts at a different neural site. Learning that food is inedible may be due to facilitation of a specific sensory pathway onto pattern generators producing rejection responses. Sustained lip stimulation seems to inhibit feeding by causing a decrement in all outputs of a particular sensory pathway. Finally, satiation appears to represent inhibition of feeding motor elements.
为了确定不同类型的行为可塑性是否影响共同的或独特的神经位点，对海兔中三种抑制进食的过程的作用进行了量化。将动物在联想学习任务（即学习食物不可食用）中进食行为的变化，与饱腹感和持续唇部刺激所引起的行为效应进行了比较。数据表明，每种改变进食的过程都可以通过停止对食物反应的时间差异、对特定食物减少反应的特异性差异以及在完全停止反应之前运动输出的不同模式来表征。数据表明，每种抑制进食的过程作用于不同的神经位点。学习食物不可食用可能是由于特定感觉通路对产生排斥反应的模式发生器的促进作用。持续唇部刺激似乎是通过导致特定感觉通路的所有输出减少来抑制进食。最后，饱腹感似乎代表了对进食运动元件的抑制。
