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Bicuculline, AP-7 and behavioral activity in rats

100%
Car H., Kuziemka-Leska M., Wisniewski K.
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issue 2
159-164
EN
The effects of bicuculline (0.25 mg/kg i.p.) and AP-7 (5 nmols icv) on the processes of retrieval, consolidation of conditioned reflexes, object recognition and locomotor activity were tested in rats. Neither AP-7, nor bicuculline nor AP-7 with bicuculline changed locomotor and exploratory activity in the open field test. Coadministration of AP-7 with bicuculline however, facilitated retrieval of passive avoidance in rats, but was without effect on consolidation in this test. Also neither AP-7 nor bicuculline when were given alone had an effect on influenced consolidation. We found no differences in effects of either AP-7 or bicuculline on object recognition regardless whether administered alone or in combination.
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6-OHDA bilateral lesions to the central amygdala do not affect vasopressin improvement of recall in rats

100%
Winnicka M. M.
Acta Neurobiologiae Experimentalis
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1996
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vol. 56
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issue 4
943-948
EN
The influence of vasopressin (AVP) on recall of information in a passive avoidance situation after bilateral 6-OHDA lesions to the central amygdala was tested. AVP given 15 min before the retention testing at the icv dose of 1 mg signifcantly prolonged avoidance latencies both in lesioned and in sham-operated rats in comparison with the respective icv saline injected animals. Insignificant increase of spontaneous locomotor activity in rats lesioned to the central amygdala was unlikely to interfere with the cognitive effect of AVP. These results suggest that dopaminergic projection to the central amygdala is not responsible for the facilitatory effect of AVP on retrieval process in a passive avoidance situation.
3
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Ultrasonic vocalizations elicit orienting and associative reactions in preweanling mice

100%
Brennan J. F., Santucci D., Branchi I., Alleva E.
Acta Neurobiologiae Experimentalis
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1999
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vol. 59
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issue 1
23-30
EN
On postnatal days (PND) 12 and 13, 90 male Swiss CD-l mice were tested for orientation to 3 intensities of recorded ultrasounds while climbing an inclined wire grid surface. Motor responses and vocalization to replayed ultrasounds (55-75 kHz) of 20-, 40-, and 60-dB SPL indicated an intensity dependence. In Experiment 2, 138 pups were exposed to either contingent or noncontingent pairings of recorded ultrasounds of 55-75 kHz, averaging 40 dB, and mild inescapable footshocks, or taped vocalizations or footshocks only on PND 12, 14, or 16. At PND 18, subjects were tested for passive avoidance following exposure to the taped ultrasounds only upon entry into the dark side of a black-white compartment. Results suggested only overall, nonspecific effects of pretreatment to elicit responses antagonistic to motor activity. In Experiment 3, 36 pups at PND 15 were tested for passive avoidance with the ultrasound recordings of 40- or 80-dB onset upon entry to the dark compartment; a third group had no ultrasound exposure. A significant intensity effect confirmed that the ultrasounds had prepotent properties.
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