Table 2. LFP and SU inferential statistics.
Top half. Repeated measures ANOVA was performed to investigate all possible main effects and interactions for LFP data (magnitude, latency, and slope) from each of Data A–C (see Materials and Methods). Alpha level was set to 0.001 for Data A–B and 0.05 for Data C. Only statistics for the main effects are summarized here, with significant statistics in bold, as the majority (>90%) of the two-, three-, and four-way interactions were not found significant and the few interactions found significant were likely due to the high degree of sampling from each rat as they identified subtle differences (<10% relative to the substantial differences observed for the main effects) and are beyond the scope of the present study. See Materials and Methods for more details. Bottom half. To address the same main effects and interactions as those for the LFP analysis, only rats with evoked SU responses for at least recording locations 1–4 were included (75% of total rats) and repeated measures ANOVA performed in the same manner for SU data (magnitude, onset latency, and peak latency) from only recording locations 1–4. Summary. Not surprisingly, LOCATION main effect was highly significant for all LFP and SU response properties, and LAYER main effect was highly significant for most LFP and SU latency properties. More noteworthy is the lack of significant results for either the main effect WHISKER or DIRECTION, or their interaction with LOCATION, suggesting that the significant LOCATION results were reproducible irrespective of whisker identity or electrode array direction.
| LFP | |||||||
|---|---|---|---|---|---|---|---|
| MAGNITUDE | LATENCY | SLOPE | |||||
| Data A | P value | P value | P value | ||||
| LOCATION (1–8) | F[7,154]=1299.3 | 1×10−15 | F[7,154]=385.8 | 1×10−15 | F[7,154]=1581.6 | 1×10−15 | |
| LAYER (supra vs. gran) | F[1,22]=5.9 | 0.023 | F[1,22]=42.7 | 1×10−6 | F[1,22]=11.7 | 0.002 | |
| DIRECTION (in vs. out) | F[1,22]=0.5 | 0.477 | F[1,22]=0.0 | 0.846 | F[1,22]=0.4 | 0.556 | |
| WHISKER (C2 vs. A2) | F[1,22]=0.2 | 0.693 | F[1,22]=1.3 | 0.262 | F[1,22]=1.0 | 0.336 | |
| Data B | |||||||
| LOCATION (1–8) | F[7,147]=1030.7 | 1×10−15 | F[7,147]=190.2 | 1×10−15 | F[7,147]=1079.9 | 1×10−15 | |
| LAYER (supra vs. gran) | F[1,21]=0.7 | 0.409 | F[1,21]=9.4 | 0.006 | F[1,21]=6.5 | 0.018 | |
| DIRECTION (ACx vs. VCx) | F[1,21]=0.6 | 0.458 | F[1,21]=1.6 | 0.222 | F[1,21]=2.1 | 0.167 | |
| Data C | |||||||
| LOCATION (1–8) | F[7,28]=348.7 | 1×10−15 | F[7,28]=161.2 | 6×10−7 | F[7,28]=380.4 | 6×10−14 | |
| LAYER (supra vs. gran) | F[1,4]=0.6 | 0.48 | F[1,4]=110.3 | 5×10−4 | F[1,4]=4.8 | 0.09 | |
| DIRECTION (VI vs. MI) | F[1,4]=6.3 | 0.07 | F[1,4]=0.3 | 0.60 | F[1,4]=1.1 | 0.36 | |
| SU | |||||||
|---|---|---|---|---|---|---|---|
| MAGNITUDE | ONSET LATENCY | PEAK LATENCY | |||||
| Data A | P value | P value | P value | ||||
| LOCATION (1–8) | F[3,45]=438.1 | 1×10−15 | F[3,45]=423.2 | 1×10−15 | F[3,45]=246.8 | 1×10−15 | |
| LAYER (supra vs. gran) | F[1,15]=9.4 | 0.008 | F[1,15]=55.3 | 2×10−6 | F[1,15]=67.2 | 6×10−7 | |
| DIRECTION (in vs. out) | F[1,15]=12.1 | 0.003 | F[1,15]=0.0 | 0.962 | F[1,15]=0.0 | 0.855 | |
| WHISKER (C2 vs. A2) | F[1,15]=0.3 | 0.588 | F[1,15]=0.0 | 0.900 | F[1,15]=1.1 | 0.312 | |
| Data B | |||||||
| LOCATION (1–8) | F[3,48]=573.2 | 1×10−15 | F[3,14]=103.1 | 9×10−10 | F[3,48]=186.5 | 1×10−15 | |
| LAYER (supra vs. gran) | F[1,16]=4.4 | 0.052 | F[1,16]=23.1 | 2×10−4 | F[1,16]=58.9 | 1×10−6 | |
| DIRECTION (ACx vs. VCx) | F[1,16]=0.4 | 0.527 | F[1,16]=0.0 | 0.994 | F[1,16]=0.0 | 0.972 | |
| Data C | |||||||
| LOCATION (1–8) | F[3,2]=87.0 | 0.01 | F[3,12]=100.7 | 9×10−9 | F[3,2]=844.2 | 1×10−3 | |
| LAYER (supra vs. gran) | F[1,4]=0.0 | 0.94 | F[1,4]=7.0 | 0.06 | F[1,4]=5.4 | 0.08 | |
| DIRECTION (VCx vs. MCx) | F[1,4]=0.6 | 0.49 | F[1,4]=0.0 | 0.90 | F[1,4]=0.0 | 0.95 | |