Relationship between physiology and...
Transcript of Relationship between physiology and...
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Relationship between physiology and behavior
Prof dr. Eco de Geus Biological Psychology
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Psychophysiology’s Holy Grail
Caccioppo et al., Handbook of Psychophysiology
“One to one mapping between psychological and
physiological events”
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FEELINGS (affect) }
Affective Events
Association cortices, Hippocampal area, Prefrontal cortex
perception & interpretation
Amygdalar complex
Pituitary Nucleus Tractus Solitarius Interomediolateral column Nucleus Ambiguus
Paraventricular & other hypothalamus nuclei
Locus Coeruleus Ventral Tegmental Area Raphe nuclei
feedback of emotional responses : Damasio’s “as if”
execution of
autonomic nervous system responses PHYSIOLOGICAL RESPONSE }
Emotion
“James/Lange” Insula, Anterior Cingulate Cortex
‘coloring’ of perception
BEHAVIORAL RESPONSE
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The Autonomic nervous system has two separate branches: Sympathetic nervous system (fight-flight). Parasympathetic (vagal) nervous system rest-digest). Most organs are dually innervated (notable exceptions: (sweat glands, adrenal glands, blood vessels, ventricle of the heart). SNS and PNS effects are opposing and their reactivity to emotion often reciprocal (but not dogmatically so).
Accelerator Brake
Sympathetic Parasympathetic
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Psychophysiological and Cognitive Applications 5
Sylvia Kreibig (2010). Autonomic nervous system activity in emotion: a review. Biological Psychology, 84(3):394-421: Positions on the degree of specificity of ANS activation in emotion, however, greatly diverge, ranging from undifferentiated arousal, over acknowledgment of strong response idiosyncrasies, to highly specific predictions of autonomic response patterns for certain emotions. A review of 134 publications that report experimental investigations of emotional effects on peripheral physiological responding in healthy individuals suggests considerable ANS response specificity in emotion when considering subtypes of distinct emotions.
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Skin Conductance Straightforward signal origin
More sweat production in the ducts in a larger number of sweat glands with more sympathetic nerve activation.
Very simple to measure
“Pure” Sympathetic
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Skin conductance & Arousal
-Skin Conductance Level increases - Frequency nonspecific Skin Conduction Responses increases
High arousal
Low arousal
- Amplitude stimulus induced Skin Conduction Responses increases
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SCRs induced by pictures
5 sec
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SCR in ventromedial lesion patients E(motional) N(eutral)
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Seidel EM, Pfabigan DM, Keckeis K, Wucherer AM, Jahn T, Lamm C, Derntl B (2013). Empathic competencies in violent offenders. Psychiatry Research, 30;210(3):1168-75
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amygdala
Fear conditioning
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Gao Y, Tuvblad C, Schell A, Baker L, Raine A (2015). Skin conductance fear conditioning impairments and aggression: a longitudinal study. Psychophysiology, 52(2):288-95.
Impaired fear conditioning in aggression
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Laboratory measurement
• Stimuli are not “for real” and insufficiently complex
• Context is not “for real”
Psychological
Physiological
• Strict standardization of factors with physiological confounding effects on the autonomic NS:
o posture o physical activity, o time of measurements, o pre-testing behavior (smoking,transportation,
consumption), o environment (illumination, noise,
temperature).
• Stimuli are of low intensity (no physiological systems triggered that are known to become active only above an intensity threshold)
• Stimuli are of short duration (only fast preparatory responses; no slow counterregulatory responses).
• Standardisation type, duration and intensity of the stimuli
DISADVANTAGES ADVANTAGES
Practical
• Physiological responses cannot be used to monitor behaviour as it unfolds or be used as cues for intervention
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A painful illustration..
15 Psychophysiological and Cognitive
Applications
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Activity of the autonomic nervous system is an ideal target for Quantified Self applications
QS
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VU Ambulatory Monitoring System
RSA, a measure of cardiac PNS activity
PEP, a measure of cardiac SNS activity
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Monitoring effects of work stress
Low work stress High work stress
NB: Only sitting activities
PE
P (m
s)0
70
80
90
100
110
120
130
Monday Thursday Non-workday
work leisure sleep work leisure sleep leisure sleep
Sympathetic, PEP Parasympathetic, RSA
Vrijkotte TG, van Doornen LJ, de Geus EJ (2004). Overcommitment to work is associated with changes in cardiac sympathetic regulation. Psychosomatic Medicine, 66(5):656-63. Vrijkotte TG, van Doornen LJ, de Geus EJ (2000). Effects of work stress on ambulatory blood pressure, heart rate, and heart rate variability. Hypertension, 35(4):880-6.
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Monitoring effects of therapy
Busscher B, Spinhoven P, de Geus EJ (2015). Psychological Distress and Physiological Reactivity During In Vivo Exposure in People With Aviophobia. Psychosomatic Medicine, 77(7):762-74.
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Ambulatory measurement
• No control over (emotional) exposures
Psychological
Physiological • Physiological responses to prolonged
psychosocial exposures (work day vs leisure time) can be measured.
• Sleep physiology can be measured. • Higher predictive validity (results can
predict future behavioural outcomes).
• No control over confounders (posture, physical activity, speech, circadian effects, eating, smoking, etc.) although they can be assessed.
• Incremental validity (e.g. in measuring emotion, not just rely on feelings, but also on the bodily response
• Higher ecological validity (representativeness of the results to the ‘real world’ and applicability to other situations and other populations).
DISADVANTAGES ADVANTAGES
Practical • Higher risk of signal loss / nonadherence to instructions
• Physiological responses can be used as cues for real-time intervention
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A painful illustration..
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Two strategies to deal with posture/activity effects
• Perform within and/or between-subject analyses only across periods with comparable posture and activity (sitting in a meeting with sitting TV viewing; standing at work at a service desk talking vs standing during a phone call with friends).
• Mathematical correction of the physiological signals for the ongoing (or recent) physical activity and posture (use parallel ambulatory recording of minute ventilation, accelerometer signals, GPS data, or muscle EMG as predictors of posture and physical activity).
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When ambulatory oxygen consumption is known, “additional heart rate” could be computed in ambulatory data.
Blix AS, Stromme SB, Ursin H (1974). Additional heart rate--an indicator of psychological activation. Aerospace Medicine, 45(11):1219-22.
Additional Heart Rate
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Ambulatory VO2 measurement
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Collect physical activity data to estimate O2 consumption
Accelerometer (+GPS) based physical activity
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predicted versus observed heart rate
Predicted HR from a hip-worn accelerometer Observed HR from the VU-AMS ECG
Additional heart rate
Additional heart rate
HR
HR
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Ambulatory Psychophysiology’s Holy Grail
Caccioppo et al., Handbook of Psychophysiology
“One to one mapping between psychological and
physiological events
in naturalistic settings
while taking confounding by e.g. physical activity into
account”
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Few words about ‘norm scores’
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Exercise turns you into a criminal?
4850525456586062646668707274
LONG-TERM DE-TRAINING POSTPONED NO TRAININGTRAINING 0 4 8 MONTHS
0 4 8 MONTHS
0 4 8 MONTHS
0 4 8 MONTHS
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Detecting doping in athletes
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Range-based alerting
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A measurement outside normal limits could be indicative of imminent aggression
Actual measures during continuous ambulatory recording
Upper and lower limits based on ongoing physical activity AND person’s own data
Hear
t rat
e ns
SCRs
…
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