FREEMAN, W. J. 
bk 
HH-+ 
m 
11 II . H I 1 1 I 
seconds 5 
1 ... I I 
Figure 7 . Concomitant changes are shown between electromyo- 
grams during shivering (upper trace) and brainstem unit discharge 
(lower trace); (a) arrest of shivering during nocioceptive stimulus 
(bar); (b-d) phasicvariationsinsynchrony with respiration; (e) onset 
of unit discharge after start of shivering; (f) onset concomitant 
with shivering. 
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