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Brain Imaging and Genetic Studies Tie Thinking Patterns to Addiction

By MedImaging staff writers
Posted on 21 Jan 2008
For the first time, scientists have identified brain sites that are activated more when individuals make impulsive decisions. In a study comparing brain activity of sober alcoholics and non-addicted people making financial decisions, the group of sober alcoholics showed significantly more "impulsive” neural activity.

The researchers also discovered that a specific gene mutation increased activity in these brain regions when people made impulsive choices. The mutation was already known to decrease brain levels of the neurotransmitter dopamine. The newly found link involving the gene, impulsive behavior, and brain activity suggests that raising dopamine levels may be an effective treatment for addiction, according to the scientists.

The lead scientist of the study is Charlotte Boettiger, Ph.D., assistant professor of psychology at the University of North Carolina at Chapel Hill (USA). Dr. Boettiger led the research as a scientist at the University of California, San Francisco's (UCSF; USA) Ernest Gallo Clinic and Research Center. Senior author is Howard Fields, M.D., Ph.D., a UCSF professor of neurology and an investigator in the Gallo Center.

The scientists used functional magnetic resonance imaging (fMRI) to image brain activity while subjects were faced with a hypothetic scenario: choose less money now, or more money later. Dr. Boettiger recruited 24 subjects: 19 provided fMRI data, nine were recovering alcoholics in abstinence, and 10 had no history of substance abuse; another five were included in the genotyping analysis.

At the fMRI research facility at the University of California, Berkeley, financial decision tasks measured rational thinking and impulsivity. Sober alcoholics chose the "now” reward almost three times more frequently than the control group, reflecting more impulsive behavior. While decisions were being made, the imaging detected activity in the posterior parietal cortex, the dorsal prefrontal cortex, the anterior temporal lobe, and the orbital frontal cortex. People who sustain damage to the orbital frontal cortex typically suffer impaired judgment, manage money poorly, and act impulsively, the scientists noted.

The study revealed reduced activity in the orbital frontal cortex in the brains of participants, who preferred "now” over "later” and most of whom had a history of alcoholism. The orbital frontal cortex activity may be a neural equivalent of long-term consequences, according to Dr. Fields.

The dorsal prefrontal cortex and the parietal cortex frequently form cooperative circuits, and this study found that high activity in both is associated with a bias toward choosing immediate rewards. The frontal and parietal cortexes are also involved in working memory-- being able to hold data in mind over a short delay. The parietal cortex and the dorsal prefrontal cortex were much more active in people unwilling to wait. This could mean, according to Dr. Boettiger, that the area is working less efficiently in those individuals.

The investigators also focused on a variant of a gene called COMT. The mutation is associated with lower dopamine levels, and the study showed that people with two copies of this allele (resulting in the lowest dopamine levels) had significantly higher frontal and parietal activity and chose "now” over "later” significantly more often. The bigger picture, Dr. Boettiger added, is that her study provides more evidence that addiction is a disease, something even some of her peers do not yet believe.

The research was published in the December 26, 2007 issue of the Journal of Neuroscience.


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91 (!!!!! 2928.9722442627): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (152.1110534668): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (44.822692871094): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (!!!!! 1458.8832855225): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (!!!!! 5459.0702056885): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (49.114227294922): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (66.041946411133): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (46.968460083008): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (114.91775512695): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
105 (65.088272094727): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
106 (84.877014160156): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=268530000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (91.075897216797): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=268530000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (!!!!! 5167.9611206055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
109 (113.01040649414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
110 (73.909759521484): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=268530000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (604.15267944336): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=268530000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (715.97099304199): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
113 (!!!!! 3469.9440002441): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
114 (87.976455688477): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
115 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
116 (138.0443572998): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
117 (70.810317993164): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
118 (54.121017456055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
119 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
120 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
121 (36.954879760742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
122 (329.01763916016): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 62448.978424072): SELECT * FROM jos_deeppockets WHERE jos_deeppockets.cat = 10 AND jos_deeppockets.type = 'deeppockets_item' AND jos_deeppockets.published = 1 AND jos_deeppockets.created + INTERVAL 14 DAY >= NOW() ORDER BY jos_deeppockets.hits DESC LIMIT 7
124 (!!!!! 4742.8607940674): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=268530000 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=268530000 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 25322.914123535): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
126 (!!!!! 16367.91229248): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
127 (57.93571472168): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
128 (31.948089599609): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
129 (47.922134399414): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
130 (31.948089599609): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
131 (331.87866210938): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
132 (43.153762817383): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
133 (33.140182495117): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
134 (30.040740966797): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
135 (535.01129150391): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (373.12507629395): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (36.954879760742): SELECT name FROM jos_deeppockets WHERE id=212
138 (28.848648071289): SELECT name FROM jos_deeppockets WHERE id=212
139 (598.90747070312): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (524.04403686523): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (!!!!! 1034.9750518799): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
142 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
143 (!!!!! 14437.913894653): TRUNCATE TABLE jos_trademed_module
144 (102.99682617188): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=268530000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (549.0779876709): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=268530000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (546.93222045898): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (70.810317993164): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
149 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
150 (!!!!! 1269.1020965576): SELECT jos_item.* FROM jos_item INNER JOIN jos_number ON jos_item.numberID=jos_number.id WHERE 1=1 AND (jos_item.imgMini<>'') AND jos_item.type='L' AND jos_item.numberID= ( SELECT jos_number.id FROM jos_number WHERE jos_number.journalID IN (10) and jos_number.id in (select distinct jos_number.id from jos_number join jos_item on jos_item.numberid=jos_number.id where jos_item.type='P') ORDER BY (CONVERT(SUBSTRING(issue,1,2),SIGNED) + (CONVERT(SUBSTRING(issue,3,2),SIGNED)*100)) DESC LIMIT 0,1 ) ORDER BY RAND() DESC LIMIT 6
151 (110.86463928223): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
152 (69.141387939453): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
153 (615.83518981934): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=268530000 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=268530000 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (56.982040405273): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=212 or channel_id is null)
155 (46.014785766602): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=212 or channel_id is null)
156 (56.028366088867): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (!!!!! 2514.8391723633): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
158 (124.93133544922): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=268530000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=268530000 AND published='1' LIMIT 1
159 (72.956085205078): select jos_twitters.link from jos_twitters where cat=10
160 (43.153762817383): select jos_facebook.link from jos_facebook where cat=10
161 (41.961669921875): select jos_google_plus.link from jos_google_plus where cat=10
162 (37.908554077148): select jos_linkedin.link from jos_linkedin where cat=10
163 (385.04600524902): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1688.9572143555): insert into jos_banners_delta values (14615,'2025-06-30 22:58:29','216.73.216.249','view'),(14202,'2025-06-30 22:58:29','216.73.216.249','view'),(14203,'2025-06-30 22:58:29','216.73.216.249','view')