fadilla zennifa neuroinformatics and neuroimaging laboratory graduate school of systems life...
TRANSCRIPT
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FADILLA ZENNIFANeuroinformatics and Neuroimaging Laboratory
Graduate School of systems Life Sciences3SL14005P
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Will not talk about it
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Previous investigation… by Aron et al (2005)
Subject : 10 woman and 7 manFMRI (functional magnetic Resonance Imaging)
romantic love
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Phase of Romantic rejection
protest despair
Try to win back the beloved Give up
Not yet substantiated
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Reward, Addiction, and Emotion Regulation systems Associated with Rejection in Love
Remember again
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Hypotesis : 4 prediction
Romantic rejection
Subcortical reward systems
Ventral Tegmental Area (VTA)
Involved in feeling romantic in love
Adversity to heighten
Subcortical and cortical areas
Drug craving
Forebrain areas
Loses and gain
Autonomic Nerveous
system (Insular Cortex)
Intense emotion
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Why it’s important to study about love?•Provides and opportunity to investigate neural
systems associated with reward and emotion within the context of a neutral life situation as opposed to a laboratory induced response.•Contribute understanding to the costly psychological,
social, reproductive and medical consequences of romantic rejection
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METHODS
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participants
• 10 women• 5 men• The average age was 19.8 ± 1.0 (SD) yr (range, 18 –21 yr)• the average length of relationship before breaking up was 21 month
(range 4-48 month), the average time since initial rejection was 21 month (range 1-32 week) and the average score on the passionate love scale was 8.0 ± 0.6 (on a 1-9 scale).
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“Have you just been rejected in love but can’t let go?
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Questionnaire
•Just prior to the scanning session, each participant completed the Passionate Love Scale (PLS).
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stimuli
Neutral stimulus Rejecter stimulus
The neutral stimulus was a photograph of familiar Individual, same sex approximamate age as the b elovedWhom there had been no emotionally close relationship
Potograph of beloved
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stimuli
The stimuli were presented using in-house software. An angled mirror was mounted on the RF coil, enabling the participant toview each image, which was projected on a screen placed directlyoutside the MRI tube, subtending a visual angle of 17°.
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But , what happen before doing experiment and after experiment?
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WHAT’S GOING ON
Instruction participants prescanning Scanning Post scanning
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stimuli
Neutral stimulus Rejecter stimulus
The neutral stimulus was a photograph of familiar Individual, same sex approximamate age as the b elovedWhom there had been no emotionally close relationship
Potograph of beloved
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Experimental design and procedures
4 tasks
30 s viewed rejecter stimulus
40s countback distraction task
30 s viewed neutral stimulus
20s countback task
the total stimulus protocolwas 720 s (12 min).
Repeated 6 times
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RESULT
Reward, Addiction, and Emotion Regulation systems Associated with Rejection in Love
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RESULT – Rejecter stimulus- specific
activations
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Discussion
Reward, Addiction, and Emotion Regulation systems Associated with Rejection in Love
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4 prediction proved
Romantic rejection
Subcortical reward systems
Ventral Tegmental Area (VTA)
Involved in feeling romantic in love
Adversity to heighten
Subcortical and cortical areas
Drug craving
Forebrain areas
Loses and gain
Autonomic Nerveous
system (Insular Cortex)
Intense emotion
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1st prediction : (Reward)• activation when viewing the person who rejected them in
areas specifically the midbrain area of the VTA and the striatum. • greater activation in the midbrain area of the VTA during
viewing of the rejecter than during viewing the neutral face in a region that overlaps with the area activated in our study of happily-in-love individuals.• showed greater activation during the viewing of the
rejecter face relative to the neutral face in forebrain regions of the reward system: the ventral striatum and region of the nucleus accumbens core, ventral/ pallidum/putamen, and orbitofrontal/prefrontal cortex. These brain regions are associated with the dopaminergic reward system.
Subcortical reward systems
Ventral Tegmental Area (VTA)
Involved in feeling romantic in love
Adversity to heighten
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2nd Prediction : (Addiction)
• rejected participants reported that they thought about their rejecter obsessively and craved emotional union with their rejecting partner. “prediction was supported”• Breiter and colleagues (1997) report that the nucleus
accumbens is activated during cocaine administration and activity in this region is positively correlated with craving for cocaine• Risinger et al. (2005) report that cocaine craving during self-
administration is positively correlated with activity in the same regions of the nucleus accumbens, prefrontal/ orbitofrontal gyrus and middle frontal gyrus where we found activity.
activated
Subcortical and cortical areas
associated
Drug craving
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3rd prediction : (Emotion regulation)
• express activity in brain regions associated with emotion regulation because all participants sought ways to resolve their strong, conflicting feelings and control their despair• Previous studies suggest that the orbitofrontal cortex where we
found activation is involved in emotion-related learning and behavior control spair• Also the lateral ventral sulcal area activated in our romantically
rejected individuals when viewing the rejecter relative to the neutral photograph was involved in reappraisal success (Wager et al. 2008). This further suggests the possibility that the responses while looking at a rejecter in this group of participants might have been adaptive.
Forebrain areas
Loses and gain
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4th Prediction (general emotion grief)
• that when viewing the rejecter relative to the neutral photograph, rejected individuals would express activity in neural regions associated with emotions .
• large area of the anterior cingulate where we found activity is involved in pain regulation (activated).
• in the context of loss and grief over the death of a beloved, O’Connor et al. (2008) found that activity in the anterior nucleus accumbens, where we also found activation when our subjects viewed the rejecter relative to the neutral photograph, was correlated with self-reported yearning as an individual mourned the death of a mother or sister. The accumbens appears to be consistently involved in reward craving and motivational relevance under a variety of circumstances. Attachment and pair-bonding
Autonomic Nerveous
system (Insular Cortex)
Intense emotion
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last
• Many of our participants expressed hope that their participation in this project would help thwm learn more about their rejection experience as well as recover from it faster and or more effectively
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Reward, Addiction, and Emotion Regulation systems Associated with Rejection in Love
Comment/question ?
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RESULT- Length of relationship and number of days since break-up• The length of the relationship was not positively associated with degree
of activation in any of the regions measured.• Thus this group was different from the happily-in-love participants in
Aron et al. (2005a), who showed greater activity in the left ventral putamen/pallidum as the relationship increased in duration• Instead, the reverse occurred: in this rejected-in-love group, the greater
the number of days since break-up was associated with less activity in the right ventral putamen/pallidum area. In addition, the number of days since break-up was positively associated with increasing activity in the right anterior cingulate gyrus (BA 24, Table 3), an area linked with cocaine craving
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CONCLUSION FOR US/ WHAT LESSON CAN WE GET?• Romantic rejecter and cocaine craving have several neural correlates
in common. The findings are consistent with the hypothesis that romantic rejection is a specific form of addiction(Fisher 2004). • The perspective that rejection in love involves subcortical reward
gain/loss systems critical to survival helps to explain why feelings and behaviors related to romantic rejection are difficult to control and lends insight into the high cross-cultural rates of stalking, homicide, suicide, and clinical depression associated with rejection in love