Table 1.

Changes in nerve activity after raphé muscimol or vehicle injection

Raphé-muscimol		Before injection	After injection	Subsequent cooling
Tail SNA	n= 7	52 ± 10	19 ± 6*	18 ± 6*
Back skin CVC-type	n= 8	39 ± 22	1 ± 0.4*	8 ± 8*
Raphé-vehicle		Before injection	After injection
Tail SNA	n= 5	52 ± 13	48 ± 12
Back skin CVC-type	n= 6	42 ± 20	23 ± 10

Values shown are 1 min means of activity (10 s spike counts) ±s.e.m. Columns show values just before raphé injection, 4–5 min after the injection (just before subsequent cooling), and at the nadir of the second subsequent cooling episode (after muscimol injection).

^*Significant differences (P < 0.05) from activity before the injection. After muscimol injection, subsequent cooling caused no further significant change. Raphé-vehicle injections also caused no significant change.