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Introduction
Page 1
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Results
Pages 5 - 6 - 7 - 8 - 9
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Discussion
Pages 10 - 11
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References
Page 12
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Added figures
Pages 13 - 14 - 15
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Figures
Figures 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10
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2. Cells firing primarily during affective defense.
Six other cells fired during affective defense at rates more than 50% greater than at any other time. Unlike the cells described above, they all had baseline rates greater than zero and they were all facilitated to some extent by a number of control manipulations of the cat. Three of these cells were from the central gray or adjacent to it within the same region as the cells which fired only during affective defense. One other was located in the reticular formation and two were located in the diencephalon medial to the mammillo-thalamic tract. Records from four of these cells are shown in Fig. 8.
Several of the cells which responded primarily during affective defense were particularly responsive to auditory stimuli associated with that behavior. Cells A7, C2 and T2 all responded during tapping on the partition which separated the cats as much as during any other control manipulation and at much higher rates than during other auditory stimuli of equal intensity. Cells C1 and R3 were not tested specifically by tapping on the partition, but they appeared to be facilitated especially when the cage was opened prior to the affective defense.
The firing rates of the cells which fired only during affective defense or primarily during affective defense were roughly proportional to the complexity of the behavior. Each cell fired at higher rates when there were two components in the response (e. g. hissing and striking) than when there was only one component (hissing or striking alone). None of these cells responded specifically during hissing or striking alone.
Several other cells were slightly or inconsistently facilitated during affective defense but not during control manipulations. Cell L2 from the superior colliculus fired during four instances of affective defense but not during seven others which seemed identical in all respects. It did not fire at any other time. Cells P1 and W3 from the hypothalamus were slightly facilitated during affective defense (less than 50% more than any other time) and were not facilitated by other manipulations.
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