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The neurobiological basis of bias and disengagement; Two neurotransmitter mechanisms implicated in visual spatial attention.

The neurobiological basis of bias and disengagement; Two neurotransmitter mechanisms implicated in visual spatial attention. - The pharmacology of attention

Status
Unknown
Phases
Unknown
Study type
Interventional
Source
NL-OMON
Registry ID
NL-OMON33564
Enrollment
48
Registered
2009-03-04
Start date
Unknown
Completion date
Unknown
Last updated
2024-05-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Geen aandoening

Interventions

Clonidine results in less noradrenaline turnover and in effect inhibits the noradrenergic system. Mecamylamine is a nicotinic acetylcholine receptor antagonist and hence, inhibits the cholinergic sy

Sponsors

Universiteit Utrecht
Lead Sponsor

Eligibility

Age
18 Years to 99 Years

Inclusion criteria

Inclusion criteria: Passing the physical/medical evaluation (in which cardiovascular functioning and blood pressure is evaluated) is a prerequisite.

Exclusion criteria

Exclusion criteria: Diagnosis of psychopathology. Current drug use Low blood pressure.

Design outcomes

Primary

MeasureTime frame
Behavioural measures In the VSC paradigm: the validity effect in ms (RT valid cued target - RT invalid cued target). A larger validity effect reflects either more bias, or less disengagement. In the stop task paradigm: the stop signal reaction time (SSRT); SSRT reflects inhibition and related disengagement. Neurophysiological (ERP) endparameters in the VSC: 1) Parietal cue ERP components (ADAN + LDAP), related to bias. 2) P1 valid cued target ERP, related to bias. 3) LPD invalidly cued target ERP, related to disengagement. Neurophysiological (ERP) endparameters in the stop task: 1) N2 stop signal ERP, related to disengagement. 2) LPD stop signal ERP, related to disengagement.

Countries

Netherlands

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP)