Table 1 Number of significantly selective neurons in each condition.

From: Orbitofrontal lesions eliminate signalling of biological significance in cue-responsive ventral striatal neurons

 

Preferred direction

Anti-preferred direction

 

Early in blocks

Late in blocks

Early in blocks

Late in blocks

Sham

 Big-preferring

1

22

4

3

 Small-preferring

4

3

0

8

 χ2 test P

0.34*

<0.001

0.69*

0.13

Lesion

 Big-preferring

0

4

0

4

 Small-preferring

2

4

2

3

 χ2 test P

0.53*

1.0

0.53*

0.71

Sham

 Choc-preferring

8

10

2

1

 Van-preferring

1

5

2

1

 χ2 test P

<0.05

0.20

0.69*

0.46*

Lesion

 Choc-preferring

3

6

1

3

 Van-preferring

1

7

1

3

 χ2 test P

0.32

0.78

0.53*

1.0

  1. Listed are the counts resulting from an ANOVA run on each neuron across trials, with factors number of drops of reward and flavour of reward. The χ2 test listed in the third row of each section compares the proportion of neurons in each category with what would be expected by chance. For the P values with asterisks, this test revealed that the overall number of significant neurons was not more than would be expected by chance; for the other P values, this test revealed whether the proportion of big-preferring versus small-preferring or chocolate-preferring versus vanilla-preferring was significantly biased away from 50/50. In addition to the tests shown, other χ2 tests revealed that in both shams and lesions, neurons were more likely to be significant for flavour late in blocks in the preferred versus the anti-preferred directions (P<0.0001 and P<0.001, respectively), and that in the preferred direction late in blocks, lesions had a significantly different distribution of neurons significant for size and flavour than would be expected based on the sham distribution (P<0.0001). Bolded P-values indicate those meeting the criterion for significance (<0.05).
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