Acute effects of vagus nerve stimulation parameters on gastric motility assessed with magnetic resonance imaging.
Acute effects of vagus nerve stimulation parameters on gastric motility assessed with magnetic resonance imaging.
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DOI:
10.1111/nmo.13853
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发表时间:
2020-07
影响因子:
3.5
通讯作者:
Liu Z
中科院分区:
文献类型:
--
作者:
Lu KH;Cao J;Phillips R;Powley TL;Liu Z
Vagus nerve stimulation (VNS) is an emerging bioelectronic therapy for regulating food intake and controlling gastric motility. However, the effects of different VNS parameters and polarity on post-prandial gastric motility remain incompletely characterized. In anesthetized rats (N=3), we applied monophasic electrical stimuli to the left cervical vagus and recorded compound nerve action potential (CNAP) as a measure of nerve response. We evaluated to what extent afferent or efferent pathway could be selectively activated by monophasic VNS. In a different group of rats (N=13), we fed each rat a gadolinium-labeled meal and scanned the rat stomach with oral contrast-enhanced magnetic resonance imaging (MRI) while the rat was anesthetized. We evaluated the antral and pyloric motility as a function of pulse amplitude (0.13, 0.25, 0.5, 1mA), width (0.13, 0.25, 0.5ms), frequency (5, 10Hz), and polarity of VNS. Monophasic VNS activated afferent and efferent pathways with about 67% and 82% selectivity, respectively. Primarily afferent VNS increased antral motility across a wide range of parameters. Primarily efferent VNS induced a significant decrease in antral motility as the stimulus intensity increased (R=−0.93, P<0.05 for 5Hz, R=−0.85, P<0.05 for 10Hz). The VNS with either polarity tended to promote pyloric motility to a greater extent given increasing stimulus intensity. Monophasic VNS biased towards the afferent pathway is potentially more effective for facilitating occlusive contractions than that biased towards the efferent pathway.
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影响因子:
3.5
作者:
Berthoud, HR;Hennig, G;Costa, M
通讯作者:
Costa, M
影响因子:
5.5
作者:
ANDREWS, PLR;GRUNDY, D;SCRATCHERD, T
通讯作者:
SCRATCHERD, T
影响因子:
3.5
作者:
Frokjaer, J. B.;Bergmann, S.;Drewes, A. M.
通讯作者:
Drewes, A. M.
影响因子:
5.5
作者:
GRUNDY, D;SCRATCHERD, T
通讯作者:
SCRATCHERD, T
DOI:
10.1016/0165-1838(87)90140-8
发表时间:
1987-04-01
期刊:
JOURNAL OF THE AUTONOMIC NERVOUS SYSTEM
影响因子:
--
作者:
DELOOF, S;BENNIS, M;ROUSSEAU, JP
通讯作者:
ROUSSEAU, JP