Table 3.

Single subject statistical analysis of ABR and VEP parameters

Modality	Parameter	Number of monkeys with EP latencies exceeding 2 SDs of that monkey’s control period mean
		Group VM period		Group V period		Group M period
		Morphine	Postinoc	Morphine	Postinoc	Morphine	Postmorph
ABR latency (ms)	Peak I	–	–	–	–	–	–
	Peak II	–	–	–	3	–	–
	Peak III	–	4	–	1	–	–
	Peak IV	–	3	–	2	–	–
	Peak V	–	3	–	–	–	–
	I–III IPI	–	3	–	1	–	–
	III–V IPI	–	2	–	–	–	–
	I–V IPI	–	2	–	–	–	–
VEP latency (ms)	N1 (O1)	–	1	–	1	–	–
	P1 (O1)	–	3	–	4	–	–
	N1 (O2)	–	1	–	2	–	–
	P1 (O2)	–	2	–	4	–	–