Attack priming in female Syrian golden hamsters is associated with a c-fos-coupled process within the corticomedial amygdala

Neuroscience
M PotegalL Skaredoff

Abstract

Allowing a resident hamster a single "priming" attack on a conspecific induces a transient aggressive arousal as indicated by a reduction in the latency and increase in the probability of attack on a second intruder presented within the next 30 min. We present two lines of evidence identifying the corticomedial amygdala as an important locus mediating this effect. (1) Attack priming significantly increases the number of neurons expressing immunocytochemically identified Fos protein in the corticomedial amygdala, but not elsewhere. Pursuit and biting of an inanimate object does not induce corticomedial amygdala c-fos expression of the same pattern or magnitude. The corticomedial amygdala contribution to the priming effect involves more than a non-specific arousal, since corticomedial amygdala c-fos expression does not correlate with locomotor activity, a standard indicator of such arousal. (2) Radiofrequency lesions of the corticomedial amygdala reduce aggression, the greatest reduction occurring with the more anterior lesions. Other behaviors, including a priming-like locomotor practice effect in a running wheel, are unaffected by corticomedial amygdala lesions. These findings suggest that attack priming is an aggression-specif...Continue Reading

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Jun 7, 2005·Hormones and Behavior·Matthew A CooperH Elliott Albers
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Jan 30, 2018·Frontiers in Systems Neuroscience·Yoshiko HashikawaDayu Lin
Aug 18, 2020·Behavioural Brain Research·Yongliang PanZuoxin Wang
Mar 12, 2021·Neuron·Dongyu WeiDayu Lin

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