Changes of interhemispheric hippocampal responses during conditioning in the awake rat
The responses of the hippocampus of the awake rat to stimulation of one of its afferent pathways were measured during classical conditioning. It was found that when the contralateral hippocampus is stimulated concurrently with the presentation of a conditioned stimulus preceding either food or an aversive shock, a late (30–40 msec) negative component in the averaged evoked response can be recorded. This late component was absent when the interhemispheric stimulation was applied prior to presentation of a conditioned stimulus or when the rat was satiated or pretreated with drugs which interfere with noradrenergic or serotonergic neurotransmission. It is suggested that classical conditioning changes neurotransmission in certain pathways in the brain and that the monoamines are involved in mediation of this change.
we examine motivations for, and costs/benefits of, participation in three interviews across a one-year period among women recently exposed to intimate partner abuse (IPA). Recruited from publicly accessible police reports, women were not informed that the study focused on IPA in recruiting materials or when they scheduled the first interview. Women ' s ratings on the Response to Research Participation Questionnaire (RRPQ) indicated a positive benefit-to-cost ratio across all three interviews. Negative responses to participation as well as severity of IPA and PTSD symptoms did not predict retention at the next interview. These data dem - onstrate that studies asking about IPA experiences, even when survivors do not know in advance that IPA will be the focus of study, can be implemented within a stable benefit-to-cost ratio over time.