Table 1.

Percent error in trials 2–8 of object-in-place scene learning for both experimental groups and across the 3 operative stages

	Object-in-place scene learning
	Preop	Postop1 (injections)	Postop2 (fornix)	Decrement after fornix transection
CON1	13.07	12.50	28.49	15.99
CON2	6.86	7.71	12.57	4.86
CON3	7.43	13.57	22.43	8.86
Mean	9.12	11.26	21.16	9.90
ACh1	3.26	2.97	29.20	26.23
ACh2	12.71	16.14	37.14	21.00
ACh3	9.50	8.00	30.07	22.07
Mean	8.49	9.04	32.14	23.10

Note: Data in the column Preop were obtained in the preoperative performance test. Postop1 were obtained after the first surgery that was bilateral saline injections into inferior temporal cortex for “CON1–3” and bilateral saporin injections into inferior temporal cortex for “ACh1–3.” Postop2 were obtained after a second surgery that was fornix transection for all monkeys. “Decrement after fornix transection” was calculated by subtracting Postop1 from Postop2.