EMDR EMDR Neurobiological Foundations 2 — Questions and Answers
Question 1: Which theory proposes that bilateral stimulation during EMDR mimics the memory processing that occurs during REM sleep?
- Somatic Experiencing Theory
- Polyvagal Theory
- REM Hypothesis (Correct answer)
- Cognitive Load Theory
Correct answer: REM Hypothesis
The REM Hypothesis suggests that the bilateral eye movements in EMDR parallel the rapid eye movements of REM sleep, facilitating adaptive memory processing similar to dreaming.
Question 2: Stephen Porges' Polyvagal Theory is relevant to EMDR because it explains:
- How bilateral tapping activates vagal nerve pathways
- How the autonomic nervous system regulates social engagement and safety responses (Correct answer)
- Why EMDR is contraindicated for clients with vagal nerve disorders
- How eye movements stimulate the dorsal vagal complex directly
Correct answer: How the autonomic nervous system regulates social engagement and safety responses
Polyvagal Theory explains how the autonomic nervous system's three states — safety, mobilization, and shutdown — influence a client's readiness and capacity for trauma processing in EMDR.
Question 3: What does 'hyperarousal' look like neurobiologically in a trauma survivor during EMDR processing?
- Excessive activation of the dorsal vagal system causing freeze
- Elevated sympathetic nervous system activity with increased heart rate and anxiety (Correct answer)
- Underactivation of the amygdala reducing emotional response
- Excessive slow-wave sleep activity interfering with waking processing
Correct answer: Elevated sympathetic nervous system activity with increased heart rate and anxiety
Hyperarousal in trauma survivors reflects heightened sympathetic nervous system activation, presenting as anxiety, increased heart rate, and heightened vigilance.
Question 4: What is the significance of 'interhemispheric communication' in EMDR neurobiological models?
- Bilateral stimulation is thought to enhance communication between left and right brain hemispheres, facilitating integration (Correct answer)
- It refers to verbal communication between the therapist and client during sets
- It describes how the therapist mirrors the client's eye movements
- It is the transfer of traumatic memories from short-term to long-term storage
Correct answer: Bilateral stimulation is thought to enhance communication between left and right brain hemispheres, facilitating integration
Some EMDR neurobiological models propose that bilateral stimulation enhances communication between brain hemispheres, supporting the integration of fragmented traumatic memories.
Question 5: Which part of the nervous system is associated with the 'freeze' or 'shutdown' response seen in some trauma survivors?
- Sympathetic nervous system
- Somatic nervous system
- Dorsal vagal complex (Correct answer)
- Ventral vagal complex
Correct answer: Dorsal vagal complex
The dorsal vagal complex, the evolutionarily oldest branch of the vagus nerve, mediates the immobilization or shutdown response seen in severe or inescapable trauma.
Question 6: Why is titrated exposure important in EMDR from a neurobiological standpoint?
- It prevents the amygdala from learning new fear associations
- It keeps clients within the window of tolerance to enable effective processing without overwhelm (Correct answer)
- It ensures bilateral stimulation does not overstimulate the corpus callosum
- It slows hippocampal memory consolidation to allow client reflection
Correct answer: It keeps clients within the window of tolerance to enable effective processing without overwhelm
Titrated exposure keeps the client's arousal level within the window of tolerance, preventing retraumatization while still activating the traumatic memory network for processing.
EMDR EMDR Neurobiological Foundations 2
Which theory proposes that bilateral stimulation during EMDR mimics the memory processing that occurs during REM sleep?