Zachary Meehan on Childhood Trauma
Events are traumatic when they involve harm or threat of harm to oneself or others (McLaughlin et al., 2014). Childhood trauma is a...
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The BioSource Blog
BioSource Faculty Explain Core Concepts Based on
Peer-Reviewed Science
BioSource Faculty
- Dec 28, 2022
- 19 min
Neuroscience Breakthroughs Since Graduate School - Part 5: Depression
Since major depressive disorder (MDD) is a heterogeneous disorder, researchers study its diverse phenotypes. Heritability ranges from 26%...
263 views0 comments
BioSource Faculty
- Dec 12, 2022
- 8 min
Rethinking the Resonance Frequency (RF) - Part 3: Slow-Paced Contraction
Slow-paced contraction (SPC) provides an alternative and unproven method for determining the resonance frequency (RF) in one or two...
206 views0 comments
BioSource Faculty
- Dec 7, 2022
- 15 min
Neuroscience Breakthroughs Since Graduate School - Part 2: Addiction
Addiction inevitably involves loss, including executive functions, health, pleasure from everyday life, productivity, and often...
256 views0 comments
BioSource Faculty
- Nov 25, 2022
- 13 min
Neuroscience Breakthroughs Since Graduate School - Part 1: Sleep
Behavioral neuroscience discoveries have proceeded at a rapid pace. This series highlights cutting-edge findings and explains their...
315 views0 comments
BioSource Faculty
- Nov 23, 2022
- 8 min
Rethinking the Resonance Frequency (RF) - Part 1: Understanding Resonance
Randomized controlled trials have demonstrated the efficacy of HRV biofeedback for diverse clinical disorders like depression, diabetes,...
331 views0 comments
BioSource Faculty
- Nov 15, 2022
- 15 min
A Guide to Selecting HRV Norms
Measurement context and client characteristics are crucial to interpreting HRV time- and frequency-domain measurements. In this post, we...
186 views1 comment
BioSource Faculty
- Oct 22, 2022
- 13 min
HRV Time-Domain Measurements for Smart People
HRV Time-Domain Measurements for Smart People describes these measurements, caveats, and practical applications.
322 views0 comments
Fred Shaffer
- Aug 13, 2022
- 3 min
Four Heart Rate Variability Myths
Four HRV myths are Heart Rate Variability Is Bad, Stability Is Good, The Sympathetic Nervous System Plays a Major Role in Short-Term HRV,...
52 views0 comments
Fred Shaffer
- Aug 1, 2022
- 2 min
How Do You Know When HRV Training is Succeeding?
During slow-paced breathing between 4.6 to 6.5 bpm, you can examine your client's raw heart rate (HR) and respiration waveforms,...
33 views0 comments
Fred Shaffer
- Jul 31, 2022
- 6 min
Slow-Paced Contraction Increases HRV
Slow-paced contraction to increase heart rate variability
433 views0 comments
Fred Shaffer
- Jul 28, 2022
- 3 min
Low-Frequency Power and Coherence Index HRV Biofeedback Training Success
The low-frequency (LF) band (0.04-0.15 Hz) is affected by breathing from ~3-9 bpm (Task Force, 1996). The baroreflex system’s resonance...
63 views0 comments
Fred Shaffer
- Jul 27, 2022
- 2 min
When Should You Not Use PPG Sensors to Measure HRV?
The electrocardiograph (ECG) and photoplethysmograph (PPG) are two methods of detecting heart rate (HR) and heart rate variability (HRV)....
25 views0 comments
Fred Shaffer
- Jul 26, 2022
- 1 min
How HRV Biofeedback Increases RSA
Respiratory sinus arrhythmia (RSA) is the speeding and slowing of the heart across each breathing cycle. RSA is the primary and entirely...
52 views0 comments
Fred Shaffer
- Jul 26, 2022
- 2 min
Faster Heart Rates Lower HRV and Increase Dementia Risk
Heart rate (HR) is important because a high rate can reduce heart rate variability (HRV), the changes in the time intervals between...
11 views0 comments
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