Ignite Creation Date:
2024-05-05 @ 10:39 PM
Last Modification Date:
2024-10-26 @ 10:22 AM
Study NCT ID:
NCT01154712
Status:
UNKNOWN
Last Update Posted:
2010-07-14
First Post:
2010-06-30
Brief Title:
Deep Low-Frequency Repetitive Transcranial Magnetic Stimulation for Cessation of Pathological Gambling
Sponsor:
BeerYaakov Mental Health Center
Organization:
BeerYaakov Mental Health Center
Study Overview
Official Title:
Deep Low-Frequency Repetitive Transcranial Magnetic Stimulation for Cessation of Pathological Gambling
Status:
UNKNOWN
Status Verified Date:
2010-01
Last Known Status:
RECRUITING
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
Pathological gambling PG is characterized by a persistent pattern of continued gambling behavior despite its adverse consequences PG is a chronic progressive male-dominated disorder which has a prevalence of 1 to 34 among US adults Deep transcranial magnetic stimulation TMS is a novel neuro-stimulation method capable of inhibiting neuronal activity when given in low frequency The hypothesis of this study is that Pathological gambling will be ameliorated if low frequency magnetic field using Brainsway H1 coil will be applied to the left dorso-lateral prefrontal cortex of these patients
Detailed Description:
Deep Low-Frequency Repetitive Transcranial Magnetic Stimulation for cessation of pathological gambling
Introduction
Pathological gambling PG is characterized by a persistent pattern of continued gambling behavior despite its adverse consequences PG is a chronic progressive male-dominated disorder which has a prevalence of 1 to 34 among US adults Typically the patients life becomes dominated by the gambling behavior leading to overwhelming financial burdens an inability to maintain a career and to the eventual disintegration of family relationships The enormous personal and social consequences of this disorder include a high rate of suicide attempts legal problems and criminal behavior R1
Several theoretical models of drug addiction have suggested that addiction is related to abnormal activity in the ventromedial prefrontal cortex system which is necessary for inhibiting both the craving for immediate reward and excitement-seeking behavior ref2 Neuropsychological studies of pathological gamblers ref 3to9 ref2 ref10 have demonstrated that pathological gamblers have deficits in the frontal lobereward system leading investigators to hypothesize that impairment of executive function may play an important role in the etiology of pathological gambling
Drawing from the field of drug dependence it has been speculated that the underlying pathology in pathological gambling is a reduction in the sensitivity of the reward system Reuter et al studied pathological gamblers and controls during a guessing game using functional magnetic resonance imaging and observed a reduction of ventral striatal and ventromedial prefrontal activation in the pathological gamblers that was negatively correlated with gambling severity linking hypo-activation of these areas to disease severity ref11 Studies in the field of addiction have shown that prefrontal regulation of behavior is reduced in basal conditions thereby contributing to the reduced salience of non-drug motivational stimuli and reduced decision-making ability However when stimuli predicting drug availability are presented there is profound activation of the prefrontal cortex and glutamatergic drive to the nucleus accumbens ref12
Potenza et al in a functional magnetic resonance imaging study demonstrated that male pathological gamblers showed relatively reduced activity in the frontal and orbitofrontal cortex caudate and basal ganglia and thalamus as compared to controls when presented with visual gambling cues ref13Recent neurobehavioral studies have demonstrated poor performance on tests of executive function in pathological gamblers suggesting that the financial risk-taking behavior seen in PG may be associated with both dorsolateral prefrontal and orbitofrontal cortex dysfunction ref 14-17Neuropsychological studies of PGs have demonstrated that PGs have deficits in the frontal lobereward system ref18 ref10Patients with pathological gambling demonstrated greater decreases in binding potential in the ventral striatum during gambling 139 than control patients 81 likely reflecting greater dopaminergic release Ventral striatal bindings at baseline during control task were also lower in patients with pathological gambling ref19
Reductions in right prefrontal activity during decision-making appear to be modulated by the presence of gambling problems and may reflect impaired working memory stimulus reward valuation or cue reactivity in substance dependent individuals ref20
PG is related to response perseveration and diminished reward and punishment sensitivity as indicated by hypoactivation of the ventrolateral prefrontal cortex when money is gained and lost Moreover intact planning abilities and normal dorsal frontostriatal responsiveness indicate that this deficit is not due to impaired executive functioning Response perseveration and ventral prefrontal hypo-responsiveness to monetary loss may be markers for maladaptive behavior seen in chemical and non-chemical addictions ref21
In one study subjects and 10 matched healthy control subjects underwent fMRI during visual presentations of gambling-related video alternating with video of nature scenes Pathological gambling subjects and control subjects exhibited overlap in areas of brain activity in response to the visual gambling cues however compared with control subjects PG subjects exhibited significantly greater activity in the right dorsolateral prefrontal cortex DLPFC including the inferior and medial frontal gyri the right parahippocampal gyrus and left occipital cortex including the fusiform gyrus R22
It has been reported that High-frequency 20-Hz rTMS of left dorsolateral prefrontal cortex can reduce cigarette smoking significantly ref23In another study found that multiple high-frequency rTMS of the DLPFC can attenuate nicotine craving ref 24Regarding cocaine addiction treatment with TMS it has been shown that one session of 10Hz rTMS over right but not left DLPFC transiently reduces craving in cocaine dependent individuals ref25Politi et al conducted a study including thirty-six subjects fulfilling DSM-IV criteria for cocaine dependence Subjects were treated with 20 trains of TMS applied to the left prefrontal cortex in frequency of 15 Hz and intensity of 100 of the motor threshold Repeated measures analyses of variance showed that cocaine craving were gradually reduced during sessions of TMS ref26
Hypothesis Assuming substance addiction and pathological gambling share similar patho-physiology and considering the evidence that transcranial magnetic stimulation of left dorsolateral prefrontal cortex can ameliorate addiction in both smoking ref23 and cocaine ref26 we hypothesize that transcranial magnetic stimulation may also reduce gambling craving in pathological gamblers
H-coil placed over the frontal cortex exerts a significant effect over the entire ipsilateral cortical hemisphere but significantly less over the contralateral hemisphere ref27Thus the H-coil placed over the DLPFC is hypothesized to exert a direct and more consistent effect on cortical and subcortical regions such as the anterior cingulate and nucleus accumbens ventral striatum compared to the figure-8 coil Because these regions are considered to play a role in drug craving and addiction rTMS applied with the H-coil may be more effective in reducing drug craving than rTMS applied with the standard figure-8 coil
Deep TMS
Deep TMS is currently being evaluated as a treatment option in major depression It has been shown to be a safe procedure ref28 ref29 The innovative design of Brainsway H-Coils is intended to generate sufficient magnetic field strength to stimulate neurons deep inside the brain mass without posing a hazard This forms the basis of the Brainsway H-Coil used in their deep rTMS device The coils are designed to maximize the electrical field deep in the brain by the summation of separate fields projected into the skull from several points around its periphery The device also minimizes the accumulation of electrical charge on the surface of the brain which can give rise to an electrostatic field that might reduce the magnitude of the induced electric field both at the surface and inside and reduce the depth penetration of the induced electric field ref30 The unique shape of the devices base includes wire coils containing several wire strips set tangentially to the scalps surface Each set of strips is connected in series and contains current flowing in the same direction therefore generating a field that extends into the brain in a specified orientation from each location along the scalp Computerized theoretical calculations were made in order to optimize the coil design for maximizing the percentage of stimulation in depth relative to the cortical regions These in conjunction with tests performed in a phantom model ref 30 ref28 ref27 demonstrated the ability to stimulate by means of the H-Coil deep brain regions It may be assumed then that the activation of deep brain regions and their interconnecting fibers may serve as a new approach in treating neuropsychiatry illnesses with prominent advantage over the standard coil unable to affect regions as deep as the H-Coil Deep TMS could be more effective than rTMS due to its deeper penetration into brain tissues ref28 The deeper penetration should produce greater action on nerve fibers connecting the prefrontal cortex to the limbic system
In a randomized controlled study of deep transcranial magnetic stimulation conducted in Israel 32 healthy volunteers 9 of which were tested for H1 coil presented in this report were evaluated for possible cognitive impairment Cognitive evaluation was conducted using the Cambridge Neuropsychological Test Automated Battery CANTAB which is sensitive to cognitive changes caused by a wide range of Central Nervous System disorders and medication side-effects No deterioration in cognitive functions was found except for a transient short-term effect of the H1-coil on spatial recognition memory on the first day of rTMS but not in the following treatment days Questionnaires conducted for emotional or mood alterations showed no significant changes except for reports on detachment experienced by subjects treated with the H1-coilIn addition stimulation with the novel H-coils was found to be well tolerated with no adverse physical or neurological outcomes ref29
Contraindications to deep TMS are essentially the same as those for rTMS Absolute contraindications include history of any metal object in the head known history of any metallic particles in the eye implanted cardiac pacemaker or any intra-cardiac lines implanted neurostimulators surgical clips or any medical pumps history of cochlear implants and a history of seizure or heat convulsion Relative contraindications include epilepsy or seizure in first degree relatives history of head injury frequent or severe headaches migraines hearing loss drug abuse or alcoholism pregnancy or not using a reliable method of birth control and systemic and metabolic disorders
Methods
40 patients aged 18-65 years diagnosed as suffering from pathological gambling according to DSM-IV-TR will be recruited from outpatient treatment programs at the Beer Yaacov Mental Health Center Within 3 days prior to the first treatment session patients will be assessed by a rater blind to real sham treatment with the following measures
1 SCID -version 2
2 Hamilton Depression 24 items
3 Hamilton Anxiety
4 Y-BOCS
5 SOGS South Oaks Gambling Screen
6 DAGS Dannon Ainhold Gambling Scale
7 VAS visual analogue scale
8 CGI-I
9 Social Adaptation Scale SAS
10 Complete battery of Neurocognitive tests
Following preliminary assessment patients will be equally and randomly divided to 2 study arms as described below
Real TMS Sham TMS Gambling photos videos 20 Patients 20 Patients
Real TMS will be given to the Dorso-lateral prefrontal cortex with the following parameters
Frequency 1HZ
Total number of stimulations per session 600
Motor threshold percentage 120
Total duration of treatment session minutes 10
Total number of treatment sessions 15
Deep TMS coil used in this study will be the H-ADD coil Please see investigators brochure
Patients will undergo 5 courses per week during 3 weeks
Evaluations Including the Neurocognitive tests will be performed 24 hours after the 15th session and again 1 week after the last session and 1 month after the last session
Introduction
Pathological gambling PG is characterized by a persistent pattern of continued gambling behavior despite its adverse consequences PG is a chronic progressive male-dominated disorder which has a prevalence of 1 to 34 among US adults Typically the patients life becomes dominated by the gambling behavior leading to overwhelming financial burdens an inability to maintain a career and to the eventual disintegration of family relationships The enormous personal and social consequences of this disorder include a high rate of suicide attempts legal problems and criminal behavior R1
Several theoretical models of drug addiction have suggested that addiction is related to abnormal activity in the ventromedial prefrontal cortex system which is necessary for inhibiting both the craving for immediate reward and excitement-seeking behavior ref2 Neuropsychological studies of pathological gamblers ref 3to9 ref2 ref10 have demonstrated that pathological gamblers have deficits in the frontal lobereward system leading investigators to hypothesize that impairment of executive function may play an important role in the etiology of pathological gambling
Drawing from the field of drug dependence it has been speculated that the underlying pathology in pathological gambling is a reduction in the sensitivity of the reward system Reuter et al studied pathological gamblers and controls during a guessing game using functional magnetic resonance imaging and observed a reduction of ventral striatal and ventromedial prefrontal activation in the pathological gamblers that was negatively correlated with gambling severity linking hypo-activation of these areas to disease severity ref11 Studies in the field of addiction have shown that prefrontal regulation of behavior is reduced in basal conditions thereby contributing to the reduced salience of non-drug motivational stimuli and reduced decision-making ability However when stimuli predicting drug availability are presented there is profound activation of the prefrontal cortex and glutamatergic drive to the nucleus accumbens ref12
Potenza et al in a functional magnetic resonance imaging study demonstrated that male pathological gamblers showed relatively reduced activity in the frontal and orbitofrontal cortex caudate and basal ganglia and thalamus as compared to controls when presented with visual gambling cues ref13Recent neurobehavioral studies have demonstrated poor performance on tests of executive function in pathological gamblers suggesting that the financial risk-taking behavior seen in PG may be associated with both dorsolateral prefrontal and orbitofrontal cortex dysfunction ref 14-17Neuropsychological studies of PGs have demonstrated that PGs have deficits in the frontal lobereward system ref18 ref10Patients with pathological gambling demonstrated greater decreases in binding potential in the ventral striatum during gambling 139 than control patients 81 likely reflecting greater dopaminergic release Ventral striatal bindings at baseline during control task were also lower in patients with pathological gambling ref19
Reductions in right prefrontal activity during decision-making appear to be modulated by the presence of gambling problems and may reflect impaired working memory stimulus reward valuation or cue reactivity in substance dependent individuals ref20
PG is related to response perseveration and diminished reward and punishment sensitivity as indicated by hypoactivation of the ventrolateral prefrontal cortex when money is gained and lost Moreover intact planning abilities and normal dorsal frontostriatal responsiveness indicate that this deficit is not due to impaired executive functioning Response perseveration and ventral prefrontal hypo-responsiveness to monetary loss may be markers for maladaptive behavior seen in chemical and non-chemical addictions ref21
In one study subjects and 10 matched healthy control subjects underwent fMRI during visual presentations of gambling-related video alternating with video of nature scenes Pathological gambling subjects and control subjects exhibited overlap in areas of brain activity in response to the visual gambling cues however compared with control subjects PG subjects exhibited significantly greater activity in the right dorsolateral prefrontal cortex DLPFC including the inferior and medial frontal gyri the right parahippocampal gyrus and left occipital cortex including the fusiform gyrus R22
It has been reported that High-frequency 20-Hz rTMS of left dorsolateral prefrontal cortex can reduce cigarette smoking significantly ref23In another study found that multiple high-frequency rTMS of the DLPFC can attenuate nicotine craving ref 24Regarding cocaine addiction treatment with TMS it has been shown that one session of 10Hz rTMS over right but not left DLPFC transiently reduces craving in cocaine dependent individuals ref25Politi et al conducted a study including thirty-six subjects fulfilling DSM-IV criteria for cocaine dependence Subjects were treated with 20 trains of TMS applied to the left prefrontal cortex in frequency of 15 Hz and intensity of 100 of the motor threshold Repeated measures analyses of variance showed that cocaine craving were gradually reduced during sessions of TMS ref26
Hypothesis Assuming substance addiction and pathological gambling share similar patho-physiology and considering the evidence that transcranial magnetic stimulation of left dorsolateral prefrontal cortex can ameliorate addiction in both smoking ref23 and cocaine ref26 we hypothesize that transcranial magnetic stimulation may also reduce gambling craving in pathological gamblers
H-coil placed over the frontal cortex exerts a significant effect over the entire ipsilateral cortical hemisphere but significantly less over the contralateral hemisphere ref27Thus the H-coil placed over the DLPFC is hypothesized to exert a direct and more consistent effect on cortical and subcortical regions such as the anterior cingulate and nucleus accumbens ventral striatum compared to the figure-8 coil Because these regions are considered to play a role in drug craving and addiction rTMS applied with the H-coil may be more effective in reducing drug craving than rTMS applied with the standard figure-8 coil
Deep TMS
Deep TMS is currently being evaluated as a treatment option in major depression It has been shown to be a safe procedure ref28 ref29 The innovative design of Brainsway H-Coils is intended to generate sufficient magnetic field strength to stimulate neurons deep inside the brain mass without posing a hazard This forms the basis of the Brainsway H-Coil used in their deep rTMS device The coils are designed to maximize the electrical field deep in the brain by the summation of separate fields projected into the skull from several points around its periphery The device also minimizes the accumulation of electrical charge on the surface of the brain which can give rise to an electrostatic field that might reduce the magnitude of the induced electric field both at the surface and inside and reduce the depth penetration of the induced electric field ref30 The unique shape of the devices base includes wire coils containing several wire strips set tangentially to the scalps surface Each set of strips is connected in series and contains current flowing in the same direction therefore generating a field that extends into the brain in a specified orientation from each location along the scalp Computerized theoretical calculations were made in order to optimize the coil design for maximizing the percentage of stimulation in depth relative to the cortical regions These in conjunction with tests performed in a phantom model ref 30 ref28 ref27 demonstrated the ability to stimulate by means of the H-Coil deep brain regions It may be assumed then that the activation of deep brain regions and their interconnecting fibers may serve as a new approach in treating neuropsychiatry illnesses with prominent advantage over the standard coil unable to affect regions as deep as the H-Coil Deep TMS could be more effective than rTMS due to its deeper penetration into brain tissues ref28 The deeper penetration should produce greater action on nerve fibers connecting the prefrontal cortex to the limbic system
In a randomized controlled study of deep transcranial magnetic stimulation conducted in Israel 32 healthy volunteers 9 of which were tested for H1 coil presented in this report were evaluated for possible cognitive impairment Cognitive evaluation was conducted using the Cambridge Neuropsychological Test Automated Battery CANTAB which is sensitive to cognitive changes caused by a wide range of Central Nervous System disorders and medication side-effects No deterioration in cognitive functions was found except for a transient short-term effect of the H1-coil on spatial recognition memory on the first day of rTMS but not in the following treatment days Questionnaires conducted for emotional or mood alterations showed no significant changes except for reports on detachment experienced by subjects treated with the H1-coilIn addition stimulation with the novel H-coils was found to be well tolerated with no adverse physical or neurological outcomes ref29
Contraindications to deep TMS are essentially the same as those for rTMS Absolute contraindications include history of any metal object in the head known history of any metallic particles in the eye implanted cardiac pacemaker or any intra-cardiac lines implanted neurostimulators surgical clips or any medical pumps history of cochlear implants and a history of seizure or heat convulsion Relative contraindications include epilepsy or seizure in first degree relatives history of head injury frequent or severe headaches migraines hearing loss drug abuse or alcoholism pregnancy or not using a reliable method of birth control and systemic and metabolic disorders
Methods
40 patients aged 18-65 years diagnosed as suffering from pathological gambling according to DSM-IV-TR will be recruited from outpatient treatment programs at the Beer Yaacov Mental Health Center Within 3 days prior to the first treatment session patients will be assessed by a rater blind to real sham treatment with the following measures
1 SCID -version 2
2 Hamilton Depression 24 items
3 Hamilton Anxiety
4 Y-BOCS
5 SOGS South Oaks Gambling Screen
6 DAGS Dannon Ainhold Gambling Scale
7 VAS visual analogue scale
8 CGI-I
9 Social Adaptation Scale SAS
10 Complete battery of Neurocognitive tests
Following preliminary assessment patients will be equally and randomly divided to 2 study arms as described below
Real TMS Sham TMS Gambling photos videos 20 Patients 20 Patients
Real TMS will be given to the Dorso-lateral prefrontal cortex with the following parameters
Frequency 1HZ
Total number of stimulations per session 600
Motor threshold percentage 120
Total duration of treatment session minutes 10
Total number of treatment sessions 15
Deep TMS coil used in this study will be the H-ADD coil Please see investigators brochure
Patients will undergo 5 courses per week during 3 weeks
Evaluations Including the Neurocognitive tests will be performed 24 hours after the 15th session and again 1 week after the last session and 1 month after the last session
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None