EMG variables in response to head and tail stimulation withF-ratios and P-values for the two-way ANOVA comparison between stimulus types
| Variable . | Head stimulus . | Tail stimulus . | F-ratio . | P-value . |
|---|---|---|---|---|
| Electrodes active (%) | 56.6±5 | 100 | 68.57 | <0.0001 |
| Electrodes active within 5 ms of first EMG onset (%) | 35.7±7.7 | 76.7±5.4 | 20.29 | <0.0005 |
| Electrode positions showing unilateral activity (%) | 70.0±11.7 | 22.4±7.4 | 14.17 | <0.002 |
| Of electrodes active unilaterally, % in position in which κ<0.01. | 93.7±3.4 | 94.5±5.5 | 2.37 | 0.129 |
| EMG amplitude (mV) | 0.049±0.015 | 0.112±0.009 | 10.67 | <0.002 |
| EMG duration (ms) | 20.1±2.2 | 23.6±1.3 | 2.02 | 0.1576 |
| EMG area (mV×ms) | 1.06±0.25 | 2.86±0.31 | 10.04 | <0.002 |
| Variable . | Head stimulus . | Tail stimulus . | F-ratio . | P-value . |
|---|---|---|---|---|
| Electrodes active (%) | 56.6±5 | 100 | 68.57 | <0.0001 |
| Electrodes active within 5 ms of first EMG onset (%) | 35.7±7.7 | 76.7±5.4 | 20.29 | <0.0005 |
| Electrode positions showing unilateral activity (%) | 70.0±11.7 | 22.4±7.4 | 14.17 | <0.002 |
| Of electrodes active unilaterally, % in position in which κ<0.01. | 93.7±3.4 | 94.5±5.5 | 2.37 | 0.129 |
| EMG amplitude (mV) | 0.049±0.015 | 0.112±0.009 | 10.67 | <0.002 |
| EMG duration (ms) | 20.1±2.2 | 23.6±1.3 | 2.02 | 0.1576 |
| EMG area (mV×ms) | 1.06±0.25 | 2.86±0.31 | 10.04 | <0.002 |
Values for EMG parameters are means ± s.e.m. Sample size is four individuals, 2-3 responses to head stimuli (10 total) and three responses to tail stimuli per fish for variables that examine the percent electrodes responding. For EMG amplitude, duration and area, a total of 146 electrode response were examined, with 39 of those being from responses to head stimuli. See Materials and methods for details of statistics. P-values in bold are significant after adjustment of table with a sequential Bonferroni correction (Rice,1989).