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- W2775553906 abstract "The ventral part of the anteromedial thalamic nucleus (AMv) is heavily targeted by the dorsal premammillary nucleus (PMd), which is the main hypothalamic site that is responsive to both predator and conspecific aggressor threats. This PMd-AMv pathway is likely involved in modulating memory processing, and previous findings from our group have shown that cytotoxic lesions or pharmacological inactivation of the AMv drastically reduced contextual fear responses to predator-associated environments. In the present study, we investigated the role of the AMv in both unconditioned (i.e., fear responses during social defeat) and contextual fear responses (i.e., during exposure to a social defeat-associated context). We addressed this question by placing N-methyl-d-aspartate (NMDA) lesions in the AMv and testing unconditioned fear responses during social defeat and contextual fear responses during exposure to a social defeat-associated context. Accordingly, bilateral AMv lesions did not change unconditioned responses, but decreased contextual conditioning related to social defeat. Notably, our bilateral AMv lesions also included, to a certain degree, the nucleus reuniens (RE), but single RE lesions did not affect innate or contextual fear responses. Overall, our results support the idea that the AMv works as a critical hub, receiving massive inputs from a hypothalamic site that is largely responsive to social threats and transferring social threat information to circuits involved in the processing of contextual fear memories." @default.
- W2775553906 created "2017-12-22" @default.
- W2775553906 creator A5043452300 @default.
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- W2775553906 date "2018-02-01" @default.
- W2775553906 modified "2023-09-23" @default.
- W2775553906 title "Influence of the anteromedial thalamus on social defeat-associated contextual fear memory" @default.
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- W2775553906 doi "https://doi.org/10.1016/j.bbr.2017.10.038" @default.
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