Table 2.

Recording counts from control and ATNx animals^a

Observed frequencies for recordings	Control	Lesion	Total
Spatial cells
At least one spatial cell was recorded	15	0	15
Spatial cells were not recorded	38	47	85
Total recordings performed	53	47	100
Nonspatial cells
At least one nonspatial cell was recorded	16	13	29
Nonspatial cells were not recorded	37	34	61
Total recordings performed	53	47	100

^aRecordings from Control and ATNx animals (where a “recording” is defined as a single trial of an open field recording session) were selected such that recordings were independent. Recordings were deemed to be independent if they were performed before and after adjustment of electrode position, or if they were several days apart, as the electrodes had likely shifted naturally. For each of these recordings, the presence or absence of both spatial cells and nonspatial cells was marked, and the observed frequencies are presented.