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Hypnosis & Functional Neurological Symptom Disorder (FND) BSCAH Annual Conference June 2019 Dr Jason Price Consultant Clinical Neuropsychologist Dept. Neuropsychology, The James Cook University Hospital, Middlesbrough jasonprice1@nhs.net
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What is fnd?
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condition of disrupted movement, sensation, cognition, and perception that is not associated with abnormal neurophysiology or structural Physical defect
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That doesn’t mean that the CNS is working normally however…. Substantial evidence that neural functioning is different in patients with FND
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Historical context – Hysterical Neuroses Jean-Martin Charcot French Neurologist Traumatic Hysteria Hypnosis Pierre Janet Coined ‘dissociation’ Saw dissociation as a maladaptive trait of the ‘hysteric’ Josef Breuer Hypnotic technique with hysteria Freud colleague Sigmund Freud Studied under Charcot 1885 Developed the ideas of traumatic unconscious = Psychoanalysis using free-association instead of hypnosis Dissociation as defence mechanism
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Terminology – DSM-5 DSM-5: DSM-5 has now specified ‘Functional Neurological Symptom Disorder’ as an alternative label to ‘Conversion Disorder’: With weakness or paralysis With abnormal movement (e.g. Tremor, dystonic) With swallowing symptoms With speech symptoms (e.g. Dysphonia, slurred speech) With attacks or seizures With anaesthesia or sensory loss With special sensory symptoms (e.g. Visual, olfactory, balance) With mixed symptoms Dissociative amnesia (300.12) and Depersonalization/Derealization Disorder (300.6) coded separately To specify acute/persistent & with/without stressor.
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Terminology for FNSD ICD-10: Dissociative/Conversion Disorder (F44.0 – F44.9 – includes dissociative amnesia) Dissociative motor disorders (F44.4) Dissociative Convulsions (F44.5) Dissociative anaesthesia & sensory loss (F44.6) Neurasthenia (F48.0) Depersonalisation/Derealisation (F48.1) ICD-11 – revision expected to include FNDS
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FNSD Epidemiology Around 1/3 of patients presenting to Neurology outpatients with symptoms such as blackouts, collapse, somatosensory disturbance, weakness, which are primarily FND (Graham, 2016; Stone et al. 2010). Approximately 10% of stroke admissions are ‘functional’ (Gargalas et al., 2015) Approximately 7% of MS patients also have co-morbid functional symptoms Up to 29% of patients with epilepsy have co-morbid NES. Substantial overlap with chronic health conditions such as pain, CF/ME, fibromyalgia
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Traditional psychological models of FND Trauma/Threat models: Psychodynamic: Defence mechanism against unacceptable unconscious impulses, thoughts, memories, images etc., breaking through into conscious awareness ‘Conversion’ of psychological distress into physical symptom ‘Safe’ re-enactment of trauma situation to help gain ‘mastery’ (i.e. psychodynamic exposure therapy!) C/B/T: Avoidance of distressing stimuli ‘Panic without panic’ Learned behaviour – (classical/operant conditioning, SLT) Evolutionary & Psychobiology: Fight/Flight/immobilisation Arousal regulation
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Up to 75% of non-epileptic seizure patients have significant trauma backgrounds Up to 2/3rd motor/movement disorder patients have trauma histories….
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25% of NES patients and 1/3rd functional motor/movement DO NOT have trauma histories Significant proportion of motor/movement patients have precipitating physical events Traditional psychological theories also don’t adequately explain the ‘mechanism’
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Neurocognitive Models
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Neurocognitive models Mark Edwards ‘A Bayesian Account of Hysteria” (2012) - Information processing approach Top down + bottom up data driven model – model of normal functioning, but explains how FND symptoms manifest Emphasises maladaptive attention & attenuation; prediction errors ATTENTION; BELIEFS & pattern recognition; AGENCY (Edwards, M.J. et al., 2013; Neurobiology of functional (psychogenic) movement disorders) Not at odds with psycholopathology models
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Bayesian Brain in FND Biological organisms prefer homeostasis to entropy Schemas of how we and the world work produce ‘hypothesis’ (expectations, beliefs) which serve to minimise entropy (and preserve homeostasis) Resulting ‘bottom up’ data (evidence) can either be consistent or incongruent with model.
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Bayesian Brain An adaptive system will be able to tolerate a degree of unexpected outcome and flex the model to either assimilate or accommodate incongruent data – the system evolves/improves. A maladaptive system is extreme, inflexible and ‘intolerant’ and resists ‘acceptance’ of the incongruent data by modulating attentional systems away from it and fixating attention on congruent information (or misinterpreting ambiguous signals), to maintain it’s position.: The result is an overly dominant ‘top down’ process which ‘fits’ the world into its view, rather than adapting with the evidence….
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FND symptoms occur when an overly dominant (and incorrect) schema is formed and then resists incoming ‘bottom up’ incongruent evidence, or misinterprets ambiguous signals as confirmatory data Can be formed by psychological or physical agonists This process is facilitated by attentional mechanisms, maladaptive beliefs and a lack of a sense of agency: e.g. broken escalator phenomenon, vibrating phone
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Sir James Paget – Nervous Mimicry She says…. ‘I cannot’; it look like ‘I will not’, but it is ‘I cannot will’
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Functional motor patients have excessive attentional focus on affected limb. Also evidenced in lack of normal ‘distraction’ of emotional stimuli in grip strength
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Let’s create a (transient!) functional symptom!
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What does Hypnosis have to do with FND? e.g. David A. Oakley, Peter Halligan, Quinton Deeley, Devin Terhune: Hypnosis can reproduce functional symptoms Hypnosis can remove above symptoms Hypnosis can modulate attentional systems Hypnosis can ‘turn off’ the neural circuits involved in agency Hypnosis can ‘turn off’ processes involved in self-monitoring Hypnosis can ‘turn off’ automatic neuropsychological processes EEG, fMRI evidence Consideration in Cochrane review for Conversion Disorders
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Hypnosis & Neuroscience Evidence Hypnosis can modulate the interconnection between the default mode network, executive control network and salience network Jiang, H. et al. (2017), Cerebral Cortex fMRI (N=57) hypnotic vs non hypnotic tasks: “These changes in neural activity underlie the focused attention, enhanced somatic and emotional control, and lack of self-consciousness that characterizes hypnosis”
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What does Hypnosis have to do with FND? Modifying the ‘Bayesian Brain’: Hypnosis involves top-down regulation of consciousness (review; Terhune, DB et al., 2017) Development of cognitive neuroscientific understanding of hypnosis has developed alongside contemporary cognitive neuroscience understanding of FND.
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Hypnosis & Neuropsychological Evidence Kihlstrom, J.F. (2013) Neuro-Hypnotism: Prospects for Hypnosis & Neuroscience,Cortex, 49(2) 365-74 Review “This instrumental use of hypnosis is particularly well-suited for identifying the neural correlates of conscious and unconscious perception and memory, and of voluntary and involuntary action” Hypnosis nullifies automatic neural processes (dominant top down processes) in High Hypnotizable subjects (e.g. Stroop Effect)
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Automatic Neuropsychological processes: reading For emaxlpe, it deson’t mttaer in waht oredr the ltteers in a wrod aepapr, the olny iprmoatnt tihng is taht the frist and lsat ltteer are in the rghit pcale. The rset can be a toatl mses and you can sitll raed it wouthit pobelrm
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Stroop effect
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Hypnosis Recreates Functional Amnesia Jamieson, G.A. et al (2017): Hypnotic amnesia for previously seen faces EEG; Alpha changes; N=24 Top down control processes activate lower level responses Process ‘protected’ from incongruent (accurate) feedback from internal/external information Alpha changes consistent with decreased (i.e. inhibited) activity in face processing cortex in HH in amnesic condition Reversed when removed from suggestion!
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Lindelov et al. (2017): RCT 27 TBI patients; 4 x 1 hour sessions WMI (WAIS-III); TMT Direct suggestions for improved WM capacity by hypnotic regression to pre-injury status and imagery of brain plasticity Outcome goal– return to pre-morbid level of functioning/within range or healthy population Medium effect improvement compared with 22 active controls; very large improvement compared to 19 active controls (Bayes Factor) Improvements held at 7 week f/u “Indication that there may be a residual capacity for normal information processing in the injured brain.” Nemeth, D.et al. (2013), Boosting Human learning by Hypnosis, Cerebral Cortex, 4(1), 801-805 Counterbalanced alert/hypnotic trance Sequence Learning task ‘Turning off’ the conscious executive control improves procedural learning FUNCTIONAL OVERLAY?
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Moene et al. (2003) Hypnosis RCT for motor conversion disorder N=44 Manualised, 10 weekly 1 hour sessions; 1 preparatory session; fidelity assessments 30 minutes self-hypnosis each day Direct suggestions for symptoms alleviation; emotional expression/insight direction Significant improvement on behavioural symptoms at end of therapy and maintained at 6 month follow-up No significant differences on general measures of psychological pathology (SCL-90)
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Hypnotic strategies for working with FND Moene et al. (2008); adapted from Deeley, Q. (2016) Motor FND: Direct attention upon affected limb; encourage awareness of sensation/movement; positively reinforce (NEED TO BE CAREFUL HERE!) Direct attention upon non-affected limb; encourage awareness of sensation/movement; positively reinforce; suggest that these sensations will flow/transfer to the unaffected limb (hypnotic variation of mirror box intervention!)
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Hypnotic strategies for working with FND Moene et al. (2008); adapted from Deeley, Q. (2016) Motor FND: Imagination of normal functioning in the past (used in successful mental imagery retraining in stroke); stimulating pre-motor circuits by strong, memory reinforced imagery Relaxation: [be creative!] general relaxation; specific relaxation of target areas (e.g. of functional spasticity) Imagination: using imagery to increase function in novel ways (e.g.rolling a ball with foot, balloon in hand) Functional tremor/shaking: ‘Letting go’ – relaxing, not resisting, shaking off (tensing increases symptoms) Incongruent imagery (e.g. imagining limbs as heavy an flaccid to reduce movement – similar to HRT in Tourette’s intervention) Imagery for sleep
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Hypnotic strategies for working with FND Moene et al. (2008); adapted from Deeley, Q. (2016) Somatosensory symptoms: Direct suggestions for gently increasing awareness of [lost] sensations (e.g. vision, hearing, touch) Can also use direct suggestions for symptom removal (need to be VERY careful with this to avoid therapeutic ‘rupture’ – consider as you would in a CBT behavioural experiment – great if it works, but need a solid ‘plan B’!) Dissociative/NES: Recreating or recalling dissociative state/event to gain mastery (perhaps using grounding techniques or attentional control) Facilitating awareness of trauma images to gain mastery (e.g. desensitization, imagery restructuring, resource overlay; linking past trauma imagery with current symptoms – EMDR type procedures)
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Hypnosis for stroke rehabilitation Diamond et al. (2006) 6 Case studies Chronic (6-79 months post-stroke; median 32 months) stroke patients; hypnosis to overcome learned non-use of upper limb 3 stage hypnotic process after choosing a motor movement that could be performed before stroke: Hypnotic imagining/remembering movement in past, then present Imagining movement alternating with eyes closed, then eyes opened (creating an active-alert/waking hypnotic state) Following high level of confidence in image, alternate imagined practice with physical performance
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Hypnosis for stroke rehabilitation Diamond et al. (2006) 4 baseline sessions; 4 x 1 hour hypnosis sessions; 4 f/u sessions Results: Qualitative improvements in motor function: Increase range of motion Increased grip strength Reduced spasticity Increased awareness and Decreased perceived effort in using paretic limb Improved outlook, increased motivation
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Process similarities of FND & Hypnosis So that pretty much cements the partnership!
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Hypnosis provides a Trojan Horse…
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Conclusions Hypnosis is already used as part of other ‘mainstream’ psychological interventions to treat FND (e.g. trauma ‘rescripting’ imagery, relaxation, sensory grounding) Hypnosis and Mindfulness are congruent with cognitive neurocognitive models of bran/mind FND (e.g. ‘Bayesian Brain’) and sit (like bookends!) at the end of a spectrum of attention based psychological therapies: Hypnosis would offer new treatment directions for FND patients: Primary intervention – influencing the Bayesian Brain Adjunctive to CBT, EMDR Functional overlay in patients with co-morbid conditions such as epilepsy, MS, TBI, stroke
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Thank you for your attention!