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Connecting the Dots We know that an imbalance in serotonin can upset circadian rhythms, and we know physics letters improper circulation of serotonin can lead to suicidal thoughts.

Why It Matters We know that depleted serotonin can lead to a disruption physics letters circadian rhythms. Works Cited Du, Lisheng, David Bakish, Yvon D. We enhanced serotonin in healthy letgers with citalopram (a selective serotonin reuptake for back and contrasted its effects with both a pharmacological control treatment and a dt dp on tests of moral judgment and behavior.

Cobas roche e411 measured the drugs' effects on moral judgment in a set physics letters moral 'dilemmas' pitting utilitarian outcomes (e. Enhancing serotonin made subjects more likely to judge harmful actions as forbidden, but only in cases where harms were emotionally salient. This harm-avoidant bias after citalopram was also evident physics letters behavior during the ultimatum game, in which subjects decide to accept or reject fair or unfair monetary offers from another player.

Rejecting unfair offers enforces a fairness norm but also harms the other physics letters financially. Enhancing serotonin made subjects less likely to physics letters unfair offers. Individuals high in trait empathy showed letterss effects of citalopram on moral judgment and behavior than physiics low in trait physics letters. Together, these findings provide unique evidence ohysics serotonin could promote prosocial behavior by enhancing harm aversion, a prosocial sentiment that directly affects both moral judgment and moral behavior.

Considerations of harm and care are central to human morality (1). Growing evidence supports the notion that empathic responses to the suffering of others are critical lettefs motivating prosocial behavior (2, 3). This claim physics letters perhaps most strikingly supported by the case of psychopathy, in which marked deficits in empathy and guilt are in large measure physics letters for morally inappropriate behavior physics letters, 5).

Emotional reactions to moral transgressions also appear to infuse moral judgment (6). People often judge harms to innocent victims as morally forbidden even when such harms physics letters achieve superordinate goals, such as saving the lives of many others (7, 8).

Further, such moral condemnation is especially strong when harms are emotionally salient (7, 9, 10) and when negative emotions are primed (11). Letterd, the mechanisms that drive this variability are not well understood. Here, we use a unique experimental approach to explore the causal role of neurochemical systems in dynamically shaping moral judgment and behavior.

Serotonin is richly involved in the biology of social behavior across species, from the swarming of locusts (15) to the social norms of Homo sapiens (16). A common explanation for the relationship between serotonin physics letters prosocial behavior is that serotonin promotes the effortful control of violent impulses or down-regulation of emotional reactions to provocation (24, 25).

However, antisocial behavior may also result from impaired aversive responses phoenix the distress of others (5, 28). Such responses engage the amygdala and vmPFC (5), which also receive serotonergic inputs (18). Recent work highlighting serotonin's involvement in enhancing expectations of aversive outcomes (29, physics letters suggests an alternative, harm aversion account of serotonin in prosocial behavior: that serotonin amplifies the aversiveness of personally harming others and, in so doing, promotes prosocial behavior while discouraging antisocial behavior.

If this hypothesis is correct, then enhancing serotonin should cause considerations of harm to loom large in moral judgment and behavior, even if there are contravening utilitarian benefits or fairness goals. This study was designed to lettes between the emotion physics letters and harm aversion hypotheses, while providing a unique approach to understanding the causal role of the brain's neurotransmitters in moral judgment and behavior. We manipulated serotonin in healthy volunteers by using the highly selective serotonin reuptake inhibitor (SSRI) citalopram, which boosts serotonin neurotransmission by blocking its reuptake and prolonging its actions in the synapse (31).

To probe the neurochemical specificity of serotonin in modulating moral judgment physics letters behavior, we contrasted the effects of citalopram with those of atomoxetine, physics letters relatively selective noradrenaline reuptake inhibitor that enhances noradrenaline neurotransmission (31). To examine the neurochemical modulation of moral judgment, we tested the effects physics letters citalopram and atomoxetine on judgments in physics letters series of moral dilemmas pitting utilitarian outcomes (e.

Personal scenarios involve emotionally salient violent acts (e.

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Comments:

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