Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"startle reflex"”.
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Temperament and Character Correlates of the Startle Reflex
… individual temperament traits can modulate the startle reflex. There is evidence supporting Cloninger’s concept of Harm Avoidance as being predictive of individual differences in reactivity to aversive stimuli. (Corr, 1997). Since this finding, a new version Cloninger’s measure includes …
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Cued affective modulation of startle reflex as a measure of emotion regulation
… the past two decades the affective modulation of startle (AMS) has been proposed as a more objective measure of emotional regulation/processing. In the basic AMS paradigm, participants view positive, negative, and neutral images. While viewing the images a startle-eliciting noise is presented. …
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Exploring Distinct Aspects of Shame and Guilt: Can Startle Reflex Modification Differentiate Shame from Guilt?
… system yields attenuation of the defensive startle reflex, but that activation of the withdrawal motivation system augments the startle reflex. Thus, approach-related guilt and withdrawal-related shame should attenuate and augment the startle magnitude, respectively. To test this prediction, …
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The impact of serotonergic and dopaminergic genetic variation on endophenotypes of emotional processing
… two well established paradigms – the acoustic startle reflex and the cortisol stress response – were employed. Both show considerable interindividual variation which has been found in quantitative genetic studies to be at least partly based on genetic factors. In addition, the neural circuits …
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Prepulse inhibition come strumento diagnostico per lo studio del comportamento impulsivo-aggressivo nella schizofrenia
… the prepulse inhibition (PPI) of the acoustic startle reflex. Notably, PPI deficits are associated with numerous neuropsychiatric conditions characterized by gating disturbances and personality aggressive traits, including schizophrenia and Tourette syndrome. Nevertheless, the mechanism …
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AN EXAMINATION OF CHANGES IN THE SOUND ENVIRONMENT AS MODULATORS OF THE HUMAN ACOUSTIC STARTLE RESPONSE IN CONTROL AND TINNITUS SAMPLES
… goal of this project was to determine whether a startle reflex paradigm could be used as a detector of tinnitus symptoms. The startle response is a brainstem reflex, initiated by sudden change in the environment. Responses can be facilitated by embedding a startle stimulus in background noise, or …
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The impact of alcohol and social context on the startle eyeblink reflex
… integrated alcohol-administration procedures, startle methodology, and social context, this study examined the impact of alcohol and social context on startle eyeblink reflex among 40 social drinkers. Results indicated that there was a significant effect of group presence, indicating that …
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Attention-Emotion Interactions in Psychopathy
… traits. Event-related brain potentials and startle reflex magnitude were collected while participants heard blink eliciting noise probes and viewed unpleasant and neutral pictures matched on visual complexity from the International Affective Picture System (Lang et al., 2005). These …
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From working memory to maths: A multi-measure physiological investigation of the impact of anxiety
… 2009) and anxiety was assessed by means of the startle reflex. In the different conditions, the probability of receiving a shock was manipulated and the estimates of the distributions fitted to the data were compared to assess whether anxiety decreased precision of recall. In a third experiment …
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Motor preparation and the auditory startle response
… In light of this new research paradigm, the startle reflex may be used as a tool to investigate motor preparation. Here, six experiments were conducted that work towards the goals of understanding the mechanism of RT shortening due to startle, and motor preparation at a subcortical level. The …
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Blast-Induced Tinnitus: A Combined Behavioral, Memri, And Electrophysiology Study
… and pre-pulse inhibition (PPI) acoustic startle reflex paradigms; the changes of thresholds of the hearing was evaluated with auditory brainstem response (ABRs), the change in the level of anxiety was evaluated with elevated plus maze; and the change in the status of memory was evaluated …
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Characterization of a novel recombinant inbred mouse model of high fear
… of trauma cues, hyperarousal (exaggerated startle) and negative alterations in cognition and mood (anhedonia). Not all individuals exposed to trauma develop PTSD, while some individuals are susceptible, some are remarkably resilient. Genetic risk factors account for up to ~30-40% of …
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Pharmacological modulation of learning and memory in mice and zebrafish: Implications for Alzheimer’s disease animal models
… in mice by measuring habituation of acoustic startle reflex (ASR). CB1 receptor agonist and antagonist's effects were assessed in two different strains of mice (i.e., C57BL/6J and C3H/HeJ). The findings further supported the strain-specific effects of CP55940. This agonist decreased …