Table 3.
Properties high- and low-rhythmic neurons
| HRNs (RI > 0.1) |
LRNs (RI <0.1) | ||
|---|---|---|---|
| Teevra cells | Orchid cells | ||
| CA1d theta (5–12 Hz) | |||
| n | 13 | 8 | 10 |
| Preferred theta phase | 37.5° ± 53.5° | 178.6° ± 39.1° | 319.2° ± 54.2° |
| Group mean vector length (r) | 0.39 ± 0.18 | 0.38 ± 0.10 | 0.20 ± 0.08 |
| Firing patterns | |||
| n | 13 | 8 | 12 |
| Firing rate M (Hz) | 37.2 ± 13.5 | 55.2 ± 14.1 | 31.9 ± 14.1 |
| Firing rate IM (Hz) | 40.7 ± 15.8 | 39.8 ± 8.1 | 29.7 ± 15.3 |
| Burst (40 ms) incidence M (Hz) | 4.40 ± 1.56 | 4.98 ± 1.30 | 2.08 ± 0.88 |
| Burst (20 ms) incidence M (Hz) | 3.47 ± 1.99 | 3.97 ± 1.42 | 1.97 ± 1.73 |
| Burst (40 ms) incidence IM (Hz) | 3.56 ± 1.23 | 4.24 ± 0.74 | 2.14 ± 1.08 |
| Burst (20 ms) incidence IM (Hz) | 3.02 ± 1.57 | 5.37 ± 1.54 | 1.82 ± 1.45 |
Firing rates are expressed as group mean of 1 s bins ± SD. Bursts are defined as >3 spikes with ISIs <40 ms or <20 ms (see burst incidence) and expressed as group mean ± SD. Interburst intervals are in milliseconds (median, interquartile range) and are expressed as group mean ±SD.
M, Movement (locomotion and/or small movements); IM, immobility.