The proportions of supraoptic neurons displaying different spontaneous activity patterns after 5 d of U50,488H (2.5 μg/hr at 0.5 μl/hr) or Ringer’s infusion into the supraoptic nucleus. The proportions of cells exhibiting each of the firing patterns were significantly different (p = 0.001, χ2test).
| Treatment | Spontaneous activity pattern | |||
|---|---|---|---|---|
| Continuous | Phasic | Irregular | Silent | |
| Ringer’s solution | 13/38 (34%) | 10/38 (26%) | 5/38 (13%) | 10/38 (26%) |
| U50,488H | 17/64 (27%) | 2/64 (3%) | 23/64 (36%) | 22/64 (34%) |