TMS Alteration of the Reward Positivity

Anhedonia Clinical Trial

Official title:

Causal Dissociation of Value Contributions to the Reward Positivity

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05443256
• Other study ID #: 20071
• Status: Recruiting
• Phase: N/A
• Start date: August 1, 2022
• Est. completion date: December 31, 2024

Study information

• Verified date: January 2024
• Source: University of New Mexico
• Contact: James Cavanagh, PhD
• Phone: 5052776830
• Email: jcavanagh[@]unm.edu
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The aim of this proposal is to demonstrate that stimulation of different brain regions differently affects the electroencephalographic feature known as the Reward Positivity (RewP).

Description:

The aim of this proposal is to demonstrate that stimulation of different brain regions differently affects the electroencephalographic feature known as the Reward Positivity (RewP). The RewP is a sensitive and specific biomarker of reward receipt. This proposal will advance a causal test of the hypothesis that there are two major sources of variance that contribute to this brain response: a dorsal midline contribution to information encoding and a ventral midline contribution that is modulated by affect. Together, these findings will reveal how the RewP acts to blend multiple aspects of value together in the service of motivated learning. The objective of this proposal is to gather pilot data to demonstrate the feasibility of using transcranial magnetic stimulation (TMS) to perturb idiosyncratically-defined (fMRI-based) dorsal or ventral targets in order to causally test the hypothesis that these different sources contribute different types of variance to the RewP. TMS double cone deep coil stimulation should diminish +RPE encoding in the RewP when compared to sham. TMS Figure-8 coil stimulation should diminish affective modulation of RewP amplitude when compared to sham.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 8
• Est. completion date: December 31, 2024
• Est. primary completion date: December 31, 2024
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 30 Years

Eligibility

Inclusion Criteria:

• Men or women aged 18-30

Exclusion Criteria:

• Participants unwilling or unable to give informed consent

• Presence of other known medical or psychiatric comorbidity that in the investigator's opinion would compromise participation in the study

• MEG/MRI contraindications

• History of psychosis

• Not fluent in English

Related Conditions & MeSH terms

• Anhedonia

Intervention

Device:
• Transcranial Magnetic Stimulation
Figure 8 coil stimulation

Locations

Country	Name	City	State
United States	University of New Mexico - Logan hall	Albuquerque	New Mexico

Sponsors (1)

Lead Sponsor	Collaborator
University of New Mexico

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Reward Positivity	EEG Amplitude 200-400 ms following reward receipt	During intervention