Definition of "unoperated"

In six unoperated animals, the ratio varied from 0.59 to 0.83 (mean ± SEM = 0.74 ± 0.02) (Fig. 2 B).

1998 April 17, Jiuyong Xie, David P. McCobb, “Control of Alternative Splicing of Potassium Channels by Stress Hormones”, in Science‎, volume 280, number 5362, pages 443–446

After diamidino yellow (DY) was injected in anteroventral portions of unilateral inferotemporal cortex, no labeled neurons were detected in the contralateral homotopic areas in the posterior-split preparation (Fig. 2 E), in marked contrast to the unoperated control (Fig. 2 F).

1998 August 7, Isao Hasegawa et al., “Callosal Window Between Prefrontal Cortices: Cognitive Interaction to Retrieve Long-Term Memory”, in Science‎, volume 281, number 5378, pages 814–818