Table 2.
Significance of paired and ordered unit co-firing.
| Unit pair (1→2) | a. Paired co-firing: spindles vs. non-spindles | b. Paired co-firing: spindles vs. shuff-spindles | c. Paired co-firing: both | d. Ordered co-firing |
|---|---|---|---|---|
| PY1–PY2 | 16.01% | 6.18% | 5.41% | 19.15% |
| IN1–IN2 | 44.66% | 32.41% | 25.00% | 15.52% |
| PY1–IN2 | 26.28% | 7.10% | 5.88% | 16.67% |
| IN1–PY2 | 32.96% | 11.05% | 10.06% | 21.31% |
a–c Percent of unit pairs with significantly increased (α = 0.001, bootstrapped significance) co-firing within 25 ms during spindles vs. non-spindles (a), spindles vs. shuff-spindles (b), and both (c). d Percent of unit pairs in (c), which also had a minimum number of co-firing events of 10, with significant order preference of co-firing within 25 ms (α = 0.05. two-sided χ2 test of proportions). Shuff-spindles = spindles with spike times randomly shuffled 1000 times.