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- W2783007512 abstract "Increasing evidences suggest that the predator threat model is a valid animal model of post-traumatic stress disorder (PTSD). However, sleep has never been examined in this model. Since sleep disturbances, including insomnia and excessive daytime sleepiness, are severe and protracted symptoms of PTSD, we hypothesized that mice exposed to predator odor trauma (POT) will display contextual fear conditioning along with severe and protracted sleep disruptions. Adult male C57BL/6J mice, instrumented with wire electrodes (to record hippocampal local field potentials [LFP] and nuchal muscle [electromyogram, EMG] activity), were exposed to contextual conditioning using soiled cat litter as unconditional stimulus (US). On day 1, fear memory acquisition (FMA) training was performed by exposing mice to contextual cage (conditional stimulus; CS) for 30 min followed by exposure to CS + US for 90 min. On day 5, fear memory recall (FMR) testing was performed by exposing mice to CS (without US) for 120 min. LFP and EMG were recorded continuously for 5 days. Mice exposed to POT displayed as follows: (1) hyperarousal coupled with electrophysiological indicators of memory acquisition and retrieval (increased hippocampal θ and γ power) during FMA and FMR; (2) increased nonrapid eye movement (NREM) δ and rapid eye movement θ power during sleep post FMA, indicating memory consolidation; (3) protracted sleep disturbances as evident by increased wakefulness, reduced NREM sleep and NREM δ power, increased NREM β power during light (sleep) period, and increased sleep during dark (active) period. Based on these results, we suggest that mice exposed to POT display severe and protracted sleep disturbances mimicking sleep disturbance observed in human PTSD." @default.
- W2783007512 created "2018-01-26" @default.
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- W2783007512 date "2018-01-13" @default.
- W2783007512 modified "2023-10-11" @default.
- W2783007512 title "Severe and protracted sleep disruptions in mouse model of post-traumatic stress disorder" @default.
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- W2783007512 doi "https://doi.org/10.1093/sleep/zsy003" @default.
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