Influence of parental deprivation on the behavioral development in Octodon degus: modulation by maternal vocalizations.

摘要: Repeated separation from the family during very early stages of life is a stressful emotional experience which induces variety neuronal and synaptic changes in limbic cortical areas that may be related to behavioral alterations. First, we investigated whether repeated parental handling, without family, leads altered spontaneous exploratory behavior novel environment (open field test) 8-day-old Octodon degus. Second, tested parentally deprived handled animals display different stimulus-evoked behaviors modified open version, positive stimulus, maternal call, was presented. In test significant influence previous found for parameters running, rearing, vocalization. Parentally degus displayed increased horizontal (running) vertical (rearing) motoric activities, but decreased vocalization, compared normal controls. The presentation vocalizations significantly grooming case running activity dependent on experience. Both deprivation-induced locomotor hyperactivity together with reduced response towards familiar acoustic signal are similar disturbances observed human attachment disorders.