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首页> 外文期刊>Brain research >Strain differences to the effects of aversive frequency ultrasound on behaviour and brain topography of c-fos expression in the rat.
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Strain differences to the effects of aversive frequency ultrasound on behaviour and brain topography of c-fos expression in the rat.

机译:应变差异对厌恶性频率超声对大鼠c-fos表达的行为和脑形貌的影响。

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Previous studies have shown that ultrasound at 20 kHz produces an escape (defence) response in the hooded Lister rat. This study compares the ultrasound-induced behavioural response in the hooded Lister and albino Wistar rat. Ultrasound (continuous tone, square wave, 20 kHz) produced an initial characteristic startle response (brisk running) in the hooded Lister rat that was followed immediately after cessation of the ultrasound by a period of freezing behaviour. In contrast, Wistar rats showed no initial escape response but a prolonged period of freezing that started during the ultrasound and continued for a period after the end of the ultrasound. Immunohistochemical assessment of c-fos expression also showed a difference between the two strains with preferential expression in the dorsal region of the rostral and caudal periaqueductal grey (PAG) in the hooded Lister rat, while the expression occurred in the ventral PAG in the Wistar rats. In summary, the two strains exhibit distinct defensive behaviours and patterns of neuronal activation in response to the same aversive signal. It remains to be determined whether these differences relate to neuronal circuitry or perception of the signal, but analysis of the mechanisms involved may help our understanding of the heterogeneity of anxiety disorders.
机译:先前的研究表明,在20 kHz的超声波下,戴头巾的Lister大鼠会产生逃避(防御)反应。这项研究比较了在戴头巾的李斯特犬和白化病Wistar大鼠中超声诱发的行为反应。超声(连续音,方波,20 kHz)在戴头巾的Lister大鼠中产生了初始的特征性惊吓反应(颤动),随后在超声停止一段时间后立即出现了冻结行为。相比之下,Wistar大鼠没有显示出最初的逃避反应,而是在超声检查期间开始并在超声检查结束后持续一段时间的长时间冻结。免疫组织化学评估c-fos表达的结果还显示,这两种品系之间存在差异,这在有兜帽的利斯特(Lister)大鼠的鼻侧和尾部导水管灰色(PAG)的背侧区域中优先表达,而在Wistar大鼠的腹侧PAG中出现该表达。 。总而言之,这两种菌株响应相同的厌恶信号表现出不同的防御行为和神经元激活模式。这些差异是否与神经元回路或信号感知有关尚待确定,但是对所涉及机制的分析可能有助于我们理解焦虑症的异质性。

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