. Author manuscript; available in PMC: 2012 Jun 1.

Published in final edited form as: Neurosci Biobehav Rev. 2010 Dec 8;35(7):1562–1592. doi: 10.1016/j.neubiorev.2010.11.007

Table 1.

Predicted physiological profiles of the four responsivity patterns.

Physiological profile		Responsivity patterns
Physiological profile		I Sensitive	II Buffered	III Vigilant	IV Unemotional
PNS	responsivity	High	Moderate	Low/moderate	Low^*
	basal	High	Moderate	Low	Low

SNS	responsivity	High/moderate	Low/moderate	High	Low^*
	basal	Moderate	Low/moderate	High	Low

HPA	responsivity	High	Moderate	High	Low
HPA	basal	Moderate	Moderate	High/moderate	Low

Unemotional individuals may display autonomic activation when faced with immediate physical threats and during agonistic confrontations, in contrast with their general pattern of unresponsivity to non-agonistic stressors.