BCIA Cheat Sheet 2026

The 30 highest-yield BCIA facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the normal range for end-tidal CO2 (EtCO2) in healthy resting adults? → 35–45 mmHg
2. Research on biofeedback for depression generally shows effects on which outcome domains? → Mood, HRV, frontal EEG asymmetry, and rumination reduction
3. The baroreflex is the feedback mechanism that: → Maintains blood pressure homeostasis by adjusting heart rate and vascular resistance
4. Which biofeedback modality has the strongest evidence for urinary incontinence in the United States? → EMG biofeedback for pelvic floor muscles
5. Which EEG frequency band is associated with relaxed, awake states and is often targeted for amplitude increase in neurofeedback? → Alpha (8–12 Hz)
6. In EMG biofeedback, the amplitude of the signal is typically reported in: → Microvolts root mean square (µV RMS)
7. The sympathetic 'fight-or-flight' response produces which cardiovascular effect? → Increased heart rate and peripheral vasoconstriction
8. A psychophysiological profile revealing low HRV, elevated GSR, elevated frontalis EMG, and low finger temperature at rest suggests: → Generalized sympathetic hyperarousal pattern consistent with chronic stress or anxiety
9. The SD1 metric in Poincaré plot HRV analysis reflects: → Short-term beat-to-beat variability, largely parasympathetic
10. The Papworth method of breathing retraining used in biofeedback primarily emphasizes: → Nasal diaphragmatic breathing integrated with relaxation into daily activities
11. What is the primary purpose of a differential amplifier in biofeedback instrumentation? → To reject common-mode noise and amplify the difference between two inputs
12. Which measure of heart rate variability reflects the high-frequency (HF) component associated with parasympathetic activity? → RMSSD and HF power (0.15–0.40 Hz)
13. In QEEG (quantitative EEG), a Z-score compares an individual's brain activity against what reference? → A normative database matched for age
14. Which of the following best describes 'multiple relationships' in the context of biofeedback ethics? → A practitioner engaging in more than one professional role simultaneously with a client
15. Psychophysiological stress profiling in an anxious client would most likely reveal: → High baseline EMG, low finger temperature, low HRV, and elevated GSR
16. Neurofeedback-based performance enhancement protocols for target sport athletes (e.g., archery, golf) most commonly use which EEG site? → T3/T4 (temporal) sites targeting verbal-analytic suppression before action
17. Which physiological measure is considered the most sensitive indicator of the acute stress response? → Skin conductance (EDA)
18. Neurofeedback training for epilepsy commonly seeks to enhance which EEG rhythm over the sensorimotor cortex? → SMR (12–15 Hz)
19. The 'relaxation response,' as described by Herbert Benson, is characterized by which physiological pattern? → Decreased oxygen consumption, heart rate, and respiration with increased skin resistance
20. Which documentation is required before beginning biofeedback treatment with a minor? → Written informed consent from a parent or legal guardian in addition to the minor's assent
21. In polyvagal theory (Porges), the ventral vagal complex is associated with which behavioral state? → Social engagement, calm, and safety
22. During HRV biofeedback training, diaphragmatic breathing is preferred over chest breathing because: → Diaphragmatic breathing maximizes vagal afferent signaling and RSA amplitude
23. Which standardized cognitive stressor is most commonly used in psychophysiological stress profiling? → Serial subtraction (mental arithmetic) task
24. The 'fight-or-flight' response is primarily coordinated by which brain structure? → Amygdala and hypothalamus
25. A client with tension-type headaches would most likely benefit from which peripheral biofeedback protocol? → EMG biofeedback at the frontalis or trapezius muscles
26. In biofeedback, what is the role of psychophysiological principles? → To monitor and modify physiological responses
27. Alpha/theta training is most frequently used as a neurofeedback protocol for which condition? → Substance use disorders and PTSD
28. What term describes chronically low CO2 levels caused by over-breathing? → Hypocapnia
29. Respiratory sinus arrhythmia (RSA) refers to the natural phenomenon where: → Heart rate increases during inhalation and decreases during exhalation
30. Which of the following is NOT commonly measured in biofeedback? → Blood sugar levels