Dr. Beate M. Herbert UKT Tuebingen, University of Tuebingen, Psychosomatic Medicine, Research Department Embodiment Embodiment and Interoception: and Interoception: „ „ The The tell tell - - tale tale heart heart ?“ ?“ – – On On the the relationship relationship between between the the perception perception of of internal internal bodily bodily signals signals , , feelings feelings and and behavior behavior „And what about the rest of the „guts“?
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Dr. Beate M. HerbertUKT Tuebingen, University of Tuebingen,
Psychosomatic Medicine, Research Department
EmbodimentEmbodiment and Interoception:and Interoception:
„„TheThe telltell--taletale heartheart?“ ?“ ––On On thethe relationshiprelationship betweenbetween thethe perceptionperception of of internalinternal
bodilybodily signalssignals, , feelingsfeelings and and behaviorbehavior
„And what about the rest of the „guts“?
„„TheThe telltell--taletale heartheart““
William James (1842William James (1842--1910)1910)
DefinedDefined thethe experienceexperience of an of an emotionemotion as as thethe perceptionperceptionof of bodilybodily responsesresponses in in thethe presencepresence of emotional of emotional stimulistimulioror imaginationimagination(„(„WhatWhat isis an an emotionemotion?“, ?“, MindMind, 1884), 1884)
–– isis whatwhat thethe heartheart tellstells usus thethe truthtruth??
ExampleExample of of thethe rolerole of „of „embodimentembodiment“ “ forforpsychopathologypsychopathology
Interoception and Interoception and EmbodimentEmbodimentTheThe perceptionperception and and processingprocessing of of internalinternal bodilybodily signalssignals in in thethe brainbrain
((BudBud Craig; Cameron)Craig; Cameron)
bodilybodily visceralvisceral and and endocrineendocrine reactionsreactions in in situationssituations of of life life signalsignal saliencesalience and and relevancerelevance („(„therethere isis no no coldcold orordisinteresteddisinterested perceptionperception““ –– A. A. DamasioDamasio, Descartes Error), Descartes Error)
and and autonomicautonomic and and endocrineendocrine bodilybodily reactionsreactions areare fedfedback to back to thethe brainbrain, , areare processedprocessed and and cancan bebe perceivedperceived(„(„somaticsomatic markersmarkers“,“, DamasioDamasio))
ConsequencesConsequences forfor emotionemotion processingprocessing, emotional , emotional experienceexperience and and decisiondecision makingmaking, , behaviorbehavior……
BodilyBodily visceralvisceral reactionsreactions basisbasis of „of „embodimentembodiment““
•• In order to In order to studystudy thethe consequencesconsequences on on ororthethe relationshiprelationship to „to „emotionemotion“, „“, „cognitioncognition“ “ and and behaviorbehavior
IsIs interoception of „interoception of „thethe heartheart“ “ relatedrelated to to thethe perceptionperception of of otherother bodilybodily signalssignals??
TwoTwo QuestionsQuestions
EffectsEffects of of foodfood deprivationdeprivation on on interoception and interoception and bodilybodily
functionsfunctionsHerbert et al., subm.
EffectsEffects of of foodfood deprivationdeprivation on on interoceptioninteroception
• Anorexia n., Bulimia n.: impairedinteroceptive awareness(statement, mostly paper-penciltests) and distorted body image
• „ disorders of the embodiedmind“
• Food deprivation and hungerrelevant for evoking symptoms(distorted body image, impairedinteroception)
Basic researchClinical research
EffectsEffects of of foodfood deprivationdeprivation on on interoceptioninteroception
•• DoesDoes shortshort--termterm foodfood deprivationdeprivation leadlead to to changeschanges in interoceptive in interoceptive awarenessawareness??
•• IsIs therethere a a relationshiprelationship betweenbetween IA and IA and feltfelthungerhunger ??
•• AutonomicAutonomic cardiaccardiac changeschanges ? Are ? Are thesetheserelatedrelated to IA?to IA?((e.ge.g. Herbert at al., 2010). Herbert at al., 2010)
ControlledControlled 2424--hs hs shortshort--termterm fastingfasting at at thethe MetabolicMetabolic Unit of Unit of thetheUniv. Univ. ClinicClinic of of TuebingenTuebingen in August 2009in August 2009
IncreaseIncrease of of heartbeatheartbeat perceptionperception scorescore inducedinduced byby fastingfasting
AutonomicAutonomic and and cardiodynamiccardiodynamic activityactivity
PEP (ms)
111
113
115
117
119
121
123
125
1 2
PEP (ms)
Herzrate (bpm)
64
65
66
67
68
69
70
71
72
bpm
HFnu
34
36
38
40
42
44
46
48
50
HFnu
CO (l/min)
5
5.5
6
6.5
7
7.5
8
IncreaseIncrease in HRin HR
DecreaseDecrease in in vagalvagal activityactivity
IncreaseIncrease in in sympatheticsympathetic activityactivity
IncreaseIncrease in in cardiaccardiac outputoutput∆∆IA IA –– ∆∆CO: r = .58, p = .01CO: r = .58, p = .01
*
*
*
*
„„CardiacCardiac awarenessawareness and and autonomicautonomic cardiaccardiacreactivityreactivity duringduring emotional emotional picturepicture viewingviewing and and mental stress“mental stress“ (Herbert et al., 2010)(Herbert et al., 2010)
„„LearningLearning processesprocesses overover lifelife--timetime“ (“ (howhow to to becomebecome a a good HP? good HP? –– startingstarting withwith greatergreater autonomicautonomic reactivityreactivity))
FeltFelt HungerHunger
0
1
2
3
4
5
6
7
8
9
1 2
Hungerempfinden
FeltFelt hungerhunger increasedincreased
Positive Positive correlationcorrelation::Hunger Hunger increaseincrease -- IA IA increaseincrease
**
SummarySummary
•• ShortShort--termterm foodfood deprivationdeprivation inducesinduces an an increaseincrease of of cardiaccardiac awarenessawareness via an via an increaseincrease of of thethe „„signalsignal strengthstrength“ of “ of thetheheartheart
•• CardiacCardiac awarenessawareness isis positivelypositivelyassociatedassociated withwith thethe feelingfeeling of of hungerhunger
WhatWhat aboutabout thethe restrest of of thethe „„internalinternal“ “ bodybody??
((e.ge.g. to . to havehave thethe heartheart to do to do sthsth, to , to bebe closeclose to to one‘sone‘sheartheart, to , to bebe sicksick at at heartheart
e.ge.g. to . to hatehate so‘ s so‘ s gutsguts, he , he did‘tdid‘t havehave thethe gutsguts to…, to to…, to spillspill one‘sone‘s gutsguts to so)to so)
Gerd Gerd GigerenzerGigerenzer: Gut : Gut feelingsfeelings, , thethe intelligenceintelligence of of thetheunconsciousunconscious, , directordirector of of thethe centercenter forfor adaptive adaptive behaviorbehavior and and cognitioncognition, MPI Berlin, MPI Berlin
““Gut feelings” across Gut feelings” across modalities: On the relationship modalities: On the relationship
between cardiac awareness and between cardiac awareness and the sensitivity for gastric the sensitivity for gastric
recordedrecorded stomachstomach contractionscontractions byby thethe perfusedperfusedcathetercatheter methodmethod. Sterile . Sterile waterwater was was perfusedperfused pastpastthethe sensingsensing elementelement of a of a physiologicalphysiological pressurepressuretransducertransducer throughthrough a a nasogastricnasogastric tubetube..
●● MeasurementMeasurement of of gastricgastric contractionscontractions-- light light flashesflashes at at peakpeak of a of a stomachstomach contractioncontraction of of 12 12 –– 15 sec 15 sec followingfollowing●● MeasurementMeasurement of of HeartbeatHeartbeat PerceptionPerception-- RR--waveswaves ECG ECG –– light light flashesflashes 128 128 msecmsec oror 384 384 msecmsec afterafter RR--wavewave
r = .51r = .51 (N = 20)(N = 20)
AcrossAcross modalitiesmodalities
•• N = 69 N = 69 youngyoung womenwomen ((studentsstudents))
►►HeartbeatHeartbeat perceptionperception::HP test (HP HP test (HP scorescore))
►►GastricGastric perceptionperception::WaterWater loadload test (Drink test)test (Drink test)drinkdrink waterwater untiluntil feelingfeeling fullfull (ml) (ml) duringduring 5 min5 min
Electrocardiogram - ECG
ElectrogastrogramElectrogastrogram -- EGGEGG
EGGEGGFig. 1. Position of multiple electrodes on abdomen. Electrodeclosest to xiphoid process is connected to each of the 4 electrodes placed along gastric axis, yielding 4 bipolar electrogastrogram(EGG) signals. Electrode on left costal margin is a ground.
FrequenciesFrequencies of of interestinterest (FFT):(FFT):
ElectrogastrogramElectrogastrogram (EGG): FFT(EGG): FFTN = 50 N = 50
EGGEGGFigFig 1:1: EGG FFT in a EGG FFT in a healthyhealthy personperson, , beforebefore and and afterafter ingestioningestion of of waterwater. . TheThe normal 3 normal 3 cpmcpm was was seenseen in in thethe EGGEGG
FigFig 2: 2: EGG FFT in a EGG FFT in a personperson withwith functionalfunctionaldyspespiadyspespia, , beforebefore and and afterafteringestioningestion of of waterwater. . ClearClear episodesepisodes of of bradygastiabradygastia withwith a rate of 1 a rate of 1 –– 2.5 2.5 cpmcpm and and absenceabsence of of 3 3 cpmcpm activityactivity areare shownshown
Results
N = 50
F(1,49) = 5.16,p = .02
Increase in % 3 cpm
ResultsCorrelationCorrelation HeartbeatHeartbeat PerceptionPerception Score Score –– WaterWater IntakeIntake (ml) in WLT(ml) in WLT
r = -.48, p = .001
Cardiac awareness isnegatively associatedwith water intake (feeling full)
Special Special situationsituation::•• In a In a situationsituation thatthat allowedallowed thethe selfself--regulationregulation of of
waterwater intakeintake accordingaccording to to visceralvisceral sensationssensations(no EGG (no EGG effectseffects))„„CardiacCardiac sensitives“ sensitives“ showshow greatergreater behavioralbehavioralselfself--controlcontrol of of waterwater intakeintake untiluntil feelingfeeling fullfull
IsIs in in accordanceaccordance withwith ……
CardiacCardiac awarenessawareness and and thethe selfself--controlcontrolof of physicalphysical loadload
Herbert et al., 2007b
In a setting where persons can freely decide on theirphysical load, good HPs experienced the same level of fatigue as poor HPs while expending less physical effort(a smaller rise in hr and CO, and a shorter covereddistance).
Cardiac awareness is positivley associated withgreater self-control of physical load in accordance withgreater (more accurately) perceived bodily cues and fatigue
Method:Cycle on a bicycle ergometer for 15 min., were free to chose the pace of cyclingDVs: + behavioral self-control: distance covered in kilometers+ physiological effort: Heart rate (bpm) and cardiac output (CO)+ subjectively rated effort: VAS (rated fatigue)
Finally• „Fasting“ as a reasonable paradigm in order to
study interoceptive processes
• Cardiac awareness is related to sensitivity of the „rest of the guts“ (interoceptive awareness)
• IA is positively related to „self-regulation“ of behavior according to ones visceral cues