Definition
Bilateral stimulation — eye movements, tapping, or auditory tones alternating left-right — is a distinctive element of EMDR. What mechanism it engages remains actively debated.
Why it matters
The confidence with which any single mechanism is offered should be tempered by the fact that the research is not settled.
The Science
Candidate mechanisms include working-memory competition (dividing attention reduces vividness), orienting responses, altered arousal, and coordinated hemispheric activity. Meta-analyses suggest bilateral stimulation contributes measurably but is not sufficient on its own.
The NSI Perspective
NSI approaches mechanism debates with curiosity. The clinical utility exists; the explanation is still being written.
Clinical Implications
Clinicians should not overclaim any single mechanism. Multiple pathways likely contribute to the observed effect.
Practical Application
If you experience EMDR, do not worry about mechanism during the session. Let the process unfold. Analysis can come later.
References
- 1.Lee CW, Cuijpers P. A meta-analysis of the contribution of eye movements in processing emotional memories. J Behav Ther Exp Psychiatry. 2013;44(2):231–239.