Responses to all manipulations¹			Firing rates
Cell	Facilitation		No change				Effect of brain stimulation
Cells firing if and only if cat displaying affective defense
F2 B2 A3 F1	A A A AD (note 5)		DRPCFL DRPCFL DCFLO RPCFL	0     0     0     0	15   6   3 11	0   0   0   1 D	Hissing, attack Hissing, circling Hissing, circling Hissing, attack
Cells facilitated 50% more by affective defense than by any other manipulation
C1 C2 R3 T2 A7 A2	ADF AFLT ADRPCFL ADRPLOBT ADOBT ADLO	F	CL CDBN CF CFL C	0.4  0.1  0.6  0.2  0.3  4.3	10 26 31 35 26 41	3 F   8 L 18 P 20 R 14 OT 24 DO	Hissing, circling Hissing, attack Sniffing Attack Attack, circling Hissing, circling
Cells facilitated slightly or inconsistently by affective defense only
L2 W3 P1	A (note 6) A A	(LDRP) C	DRPCFLO FO DRPCFL	0  0.6  2.3	1   2   9	0   2 b   7 b	Head turning Escape Arousal

1 Letters refer to following manipulations. A: affective defense; B: banging noise ; C: clicks; D: dropping cat; E: eating horsemeat; F: flashes; G: grasping paw; H: passive head movement; L: lifting cat; N: scraping noise; O: opening cage; P: pinching tail; R: leg retraction; S: stroking cat; T: tapping partition separating cats; U: standing up; b: baseline, spontaneous activity.

2 Mean firing rate per second of baseline data. Distribution is Poisson unless indicated as normal by letter "n".

3 Mean firing rate per second based on one-second measures only.

4 Highest firing rate during any one second of any manipulation other than affective defense. Letter symbols as above.

5 Although cell fired one spike when cat was dropped, it was included in this category because its response characteristics resembled those of other "if and only if" cells more closely than any other type.

6 Inconsistent response, present in only 4 of 11 trials. Inconsistent responses are not reported in these tables for other cells.