Table 1.

Table of abbreviations.

Term	Abbreviation	Term	Abbreviation
AC	Alternating current	PEP	Pre-ejection period
BOLD signal	Blood-oxygen-level-dependent signal	PNS	Parasympathetic nervous system
BP	Blood pressure	PP	Pulse pressure
BRS	Baroreflex sensitivity	PPG	Photoplethysmography
CAPS	Clinician-administered PTSD scale	PTSD	Posttraumatic stress disorder
CI	Confidence interval	PTT	Pulse transit time
CONSORT	Consolidated standards of reporting trials	RP	Respiration prominence
DBP	Diastolic blood pressure	RR	Respiratory rate
DC	Direct current	RSP	Respiration
ECG	Electrocardiography	RW	Respiration width
EDA	Electrodermal activity	SBP	Systolic blood pressure
fc	Cutoff frequency	SCG	Seismocardiography
fNSSCR	frequency of non-specific skin conductance responses	DSM	Diagnostic and statistical manual of mental disorders
GAD	Generalized anxiety disorder	SCID	Structured clinical interview for DSM disorders
(HF/LF) HRV	(High frequency/low frequency) heart rate variability	SCL	Skin conductance level
HR	Heart rate	SCR	Skin conductance response
HR-PET	High resolution positron emission tomography	SD1	Poincare-based short-term HRV
(k)Hz	(kilo)Hertz	SD2	Poincare-based short- and long-term HRV
LSCR	Latency of skin conductance response	SD	Standard deviation
MAP	Mean arterial pressure	SIAD	Substance induced anxiety disorder
MDD	Major depressive disorder	SNS	Sympathetic nervous system
OCD	Obsessive compulsive disorder	SPAWAR	Naval Information Warfare Systems Command
PAT	Pulse arrival time	(tc/ta) VNS	(Transcutaneous cervical/auricular) vagus nerve stimulation