🧘 Biofeedback Chronic Pain Coping Simulator

Baseline Stress Physiology in Chronic Pain

Chronic pain keeps muscles tense and heart rhythm rigid.

• 28 μV: Resting muscle tension (elevated EMG baseline)
• 16 ms: Heart rate variability (low vagal tone)
• High: Pain-related distress (unmanaged stress response)
• None yet: Voluntary control (no biofeedback training)

Sympathetic dominance

Chronic pain sustains a constant fight-or-flight arousal state.

Muscle guarding

Tense guarding muscles worsen and prolong pain signals.

Low HRV

Rigid heart rhythm reflects poor autonomic stress regulation.

Real-Time Biofeedback Sensor Monitoring

Sensors convert hidden physiology into visible, actionable signals.

• 2: EMG electrodes (placed over trapezius muscle)
• PPG: HRV sensor type (pulse-derived heartbeat intervals)
• 256 Hz: Sampling rate (continuous waveform capture)
• <100 ms: Display latency (near-instant feedback loop)

EMG sensing

Surface electrodes detect tiny muscle electrical activity.

HRV sensing

Pulse sensor times beat-to-beat interval changes.

Feedback display

Waveforms and gauges make invisible signals visible.

Practicing Relaxation While Watching Feedback

Patients test breathing and relaxation while watching live traces.

• 6/min: Diaphragmatic breathing (paced slow breathing rate)
• Variable: Trial attempts (trial-and-error self-regulation)
• Small: Early tension dips (inconsistent initial control)
• Building: Patient confidence (still learning what works)

Trial and error

Patients try techniques and watch traces respond.

Paced breathing

Slow exhalation nudges heart rhythm toward variability.

Operant learning

Visible feedback reinforces successful relaxation attempts.

Reliable Voluntary Control on Demand

Repeated sessions turn relaxation into a reliable, on-demand skill.

• 8–12: Typical sessions needed (training course length)
• ~50%: Tension reduction (from baseline EMG levels)
• ~2×: HRV increase (improved parasympathetic tone)
• High: Skill consistency (control now repeatable)

Motor learning

Practice consolidates relaxation into an automatic skill.

Faster onset

Patients reach calm states more quickly now.

Generalization

Skill transfers beyond the clinic into daily life.

Voluntary Control Reduces Pain-Related Distress

Learned physiological control lowers distress even when pain remains.

• 70–90%: Perceived pain control (patient-reported improvement)
• Low: Muscle tension (near-normal resting EMG)
• High: Heart rate variability (restored autonomic flexibility)
• Strong: Coping confidence (durable self-management skill)

Distress reduction

Lower tension and higher HRV ease suffering.

Self-efficacy

Patients trust their own regulation ability now.

Lasting change

Skills persist without continuous sensor feedback.