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The evaluation of selected functional connectivity between neurons generating resting discharge in postganglionic neurons before and after deafferentation of aortic baroreceptors

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Jakubiak M., Warchulinska J., Malecka-Massalska T., Niechaj A.

Acta Neurobiologiae Experimentalis

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2014

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tom 74

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nr 3

The neurons generating resting discharge in postganglionic neurons are constantly apprised by activity of aortic baroreceptors. We evaluated influence of denervation of baroreceptors on appearance and size of parameters of shared input accompanied with reciprocal activation observed in activity of sympathetic renal fibers of anaesthetized rabbits. The number of examined interaction was significantly reduced an hour after baroreceptor deafferentation in comparison with control conditions (χ2=5.738; P=0.017). However the evaluation of value of parameters of cross-correlation (width of shared input, height of shared input, mean amplitude and width of reciprocal activation and the distance between peaks) carried out during intact baroreceptor innervation and one hour after severing aortic nerves did not show any significant differences.

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Parameters of shared input and modulations of activity of pairs of sympathetic renal neurons

100%

Warchulinska J., Jakubiak M., Malecka-Massalska T., Niechaj A.

Acta Neurobiologiae Experimentalis

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2014

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tom 74

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nr 3

This study was carried out on sympathetic renal fibers of anaesthetised rabbits. Shared input assessed by cross-correlation analysis was found in 159 pairs of neurons in control conditions and in 128 during increased blood pressure. The width of cross-correlogram peak was 237.57±5.54 ms in control conditions and 249.97±7.13 ms during elevated blood pressure. The peak height was respectively 4.03±0.14 spikes/s and 4.39±0.23 spikes/s. Geometric mean of frequency of discharge of neuronal pairs was 1.17±0.04 spikes/s and 0.93±0.04 spikes/s. Geometric mean of cardiac modulation was weak 33.56±1.18% and significantly correlated with geometric mean of frequency of discharge and correlogram width in control conditions. The respiratory modulation of pairs of neurons was strong – respectively 78.63±0.85% and 88.29±0.95% – and was significantly related with geometric mean of frequency of discharge, correlogram width and peak height in resting conditions.

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Immediate effects of increased blood pressure on pattern of resting discharge in renal postganglionic neurons

88%

Warchulinska J., Jakubiak M., Lupa K., Tarnecki R., Niechaj A.

Journal of Pre-Clinical and Clinical Research

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2008

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tom 02

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nr 1

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Antibodies against heat shock proteins [HSP-90] in patients with metabolic syndrome

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Malecka-Massalska T., Skorzynska K., Jakubiak M., Warchulinska J., Petkowicz J., Lupa K.

Journal of Elementology

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2009

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tom 14

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nr 3 Suppl.

57-58

Ograniczanie wyników

2 Acta Neurobiologiae Experimentalis

1 Journal of Elementology

1 Journal of Pre-Clinical and Clinical Research

4 Jakubiak M.

4 Warchulinska J.

3 Malecka-Massalska T.

3 Niechaj A.

2 Lupa K.

1 Petkowicz J.

1 Skorzynska K.

1 Tarnecki R.

2 2014

1 2009

1 2008

The evaluation of selected functional connectivity between neurons generating resting discharge in postganglionic neurons before and after deafferentation of aortic baroreceptors

Parameters of shared input and modulations of activity of pairs of sympathetic renal neurons

Immediate effects of increased blood pressure on pattern of resting discharge in renal postganglionic neurons

Antibodies against heat shock proteins [HSP-90] in patients with metabolic syndrome