Table 2.

Total neurons recorded

	mPFC	VS
Total cells firing > 0.5 Hz recorded under standard delay	897	383
Positive ramping cells	158	81
Negative ramping cells	282	112
Non-ramping cells	457	190
Total cells with ≥ 4 prematures recorded under standard delay	784	116
Predictive cells	236	34
Positive ramping cells	137 (54)	23 (10)
Negative ramping cells	244 (80)	34 (11)
Non-ramping cells	403 (102)	59 (13)
Total cells firing > 0.5 Hz under variable delay	211	–
Positive ramping cells	20	–
Negative ramping cells	33	–
Non-ramping cells	158	–

Numbers shown in brackets are the number of predictive cells falling into each subgroup.