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1

Neural mechanisms of visual assiociative processing

100%
Eckhorn R., Gail A., Bruns A., Gabriel A., Al-Shaikhli B., Saam M.
Acta Neurobiologiae Experimentalis
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2004
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tom 64
|
nr 2
2

Lack of synchrony between breeding in two neighbouring starling [Sturnus vulgaris L.] populations in New Zealand: evidence of no regional effect of the ENSO?

84%
Flux J. E. C., Bull P. C., Zduniak P., Tryjanowski P.
Polish Journal of Ecology
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2009
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tom 57
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nr 2
363-369
Weather and climatic conditions may impact on many aspects of bird populations, including population size, the timing of breeding and synchrony between these variables in local populations. We examined synchrony in population size and the laying date of two starling Sturnus vulgaris populations 25 km apart, at Ohau and Belmont, in New Zealand. Data were collected in nest-boxes in both study plots from 1970 to 2003. Additionally we investigated possible relationships with a large geographical climate index, the El Niño Southern Oscillation (ENSO). Starlings at Ohau bred significantly earlier than at Belmont. The difference in the median of year median date of laying the first egg was 3 days. Simultaneously, the percent of nest boxes used by birds was much higher in Ohau (86%, SE = 4.1) than in Belmont (52%, SE = 2.9). However, we did not find a significant relationship between median dates of laying and the percent of nest boxes used by birds in each breeding season in the two populations. Furthermore, we found no influence of ENSO on (potential) synchrony in starlings’ breeding parameters. We suggest that lack of synchrony between two close local populations, both in percentage of occupied nest boxes and time of laying, is due to starlings responding to very local conditions, like food availability. We urge future studies to take advantage of spatially close populations.
3

Phenology and synchrony of roe deer breeding in Northern Italy

84%
Raganella-Pelliccioni E., Scremin M., Toso S.
Acta Theriologica
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2007
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tom 52
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nr 1
The timing and synchrony of births of roe deerCapreolus capreolus Linnaeus, 1758 population were examined for 7 consecutive years in northern Italy. From 1997 to 2003, 136 fawns, 65 females and 71 males, from 117 litters were captured. The average date of fawning (30th of May) was constant among years and between sexes. The onset of parturition was 19th of May while the total length of the parturition season was 25 days (from 19th of May to 13th of June). Births were highly synchronous, with 80% of births occurring in 17 days. Synchrony of birth did not exhibit any significant interannual or intersexual variation. The stability of the birth pattern was confirmed by the parturition date of 13 radiocollared females who all gave birth within 4 days in consecutive fawning seasons. In agreement with previous findings, our data support the hypothesis that the roe deer is constrained at both ends of the fawning season by the short time between the fawning season and rut and by the need to match optimal climate conditions and forage quality to face late gestation and lactation. All these factors result in a relatively stable and synchronous birth season.
4

Searching for significance in spatio-temporal firing patterns

84%
Gerstein G. L.
Acta Neurobiologiae Experimentalis
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2004
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tom 64
|
nr 2
5

In vitro recorded theta-like activity in the limbic cortex: comparison with spontaneous theta and epileptiform discharges

67%
Konopacki J., Golebiewski H., Eckersdorf B., Kowalczyk T., Bocian R.
Acta Neurobiologiae Experimentalis
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2000
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tom 60
|
nr 1
The generation of EEG theta rhythm in the mammalian limbic cortex is a prime example of rhythmic activity that involves central mechanisms of oscillations and synchrony. This EEG pattern has been extensively studied since 1938, when Jung and Kornmuller (1938) demonstrated the first theta recordings in the hippocampal formation of rabbits. In 1986 in collaboration with Drs. B.H. Bland, S.H. Roth and B.M. Maclver we demonstrated for the first time that bath perfusion of hippocampal slices with the cholinergic agonist, carbachol, resulted in theta-like oscillations. Since this initial demonstration of in vitro theta-like activity, we have carried out a number of experiments in an attempt to answer the basic question: what are the similarities between cholinergic-induced in vitro theta-like activity and theta rhythm which naturally occurs in the in vivo preparation. Thus far, our studies have provided strong evidence that theta-like activity recorded in vitro shares many of the physiological and pharmacological properties of theta rhythm observed in vivo. The question whether in vitro theta-like oscillations reflect features of epileptiform activity is also adressed in this review.
6

Development of oscillatory activity in the limbic cortex in vitro

59%
Konopacki J.
Acta Neurobiologiae Experimentalis
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1996
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tom 56
|
nr 1
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