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Construct: Habit

RDoC Classification

Domain: Positive Valence Systems

Description

Sequential, repetitive, motor, or cognitive behaviors elicited by external or internal triggers that, once initiated, can go to completion without constant conscious oversight. Habits can be adaptive by virtue of freeing up cognitive resources. Habit formation is a frequent consequence of reward learning, but its expression can become resistant to changes in outcome value. Related behaviors could be pathological expression of a process that under normal circumstances subserves adaptive goals.

Molecules

Acetylcholine Co-released neuromodular glutamate CREB dopamine and dopamine-related molecules FosB

Cells

Dopaminergic neurons medium spiny neurons Substantia Nigra

Circuits

dorsal striatum Medial prefrontal SN/VTA Ventral striatum

Behavior

Compulsive behaviors Repetitive behaviors Stereotypic behaviors

Self-Report

Aberrant behaviors checklist Measures of repetitive behaviors

Paradigms

Devaluation task Habit Learning Task Habit Task