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Brain Activity in Patients with Chronic Low Back Pain Captured by Arterial Spinal Labeling

By MedImaging International staff writers
Posted on 11 Aug 2011
A new study utilizes a new imaging technique, arterial spin labeling, to show the regions of the brain that are activated when patients with low back pain have a worsening of their usual, chronic pain.

This research is published in the August 2011 issue of the journal Anesthesiology. “This study is a first step towards providing tools to objectively describe someone’s chronic pain which is a subjective experience. We’ve found that when a patient has worsening of their usual pain, there are changes in the activity of the brain,” said Ajay Wasan, MD, MSc, lead author of the paper and a researcher in the Pain Management Center at Brigham and Women’s Hospital (BWH; Boston, MA, USA). “These changes occur in the network of areas in the brain that process pain and mood.”

Researchers compared 16 patients with chronic low back pain (CLBP) to 16 healthy study participants. The subject underwent three imaging sessions. The first was for a characterization and training session. During the second session, researchers used clinical maneuvers, such as pelvic tilting or straight leg rising, to exacerbate back pain temporarily. In the third session, heat was applied to the skin at an intensity that correlated with the pain levels during the second session. Patients rated their pain levels before and after the sessions, and after each stimulation during the sessions.

During the last two sessions, researchers used the arterial spin labeling technique (ASL), which allows them to quantify the blood flow to specific regions of the brain over time. The amount of blood flow is indicative of neuron activity in that region of the brain. They found that there was increased activity in the brain of CLBP patients only when they experienced a worsening of their chronic pain and not during the heat pain session or in the healthy participants. Researchers additionally noted that some of the areas of the brain that were activated when participants experienced a worsening of chronic pain have been shown to be tied to other types of pain found in other studies. However, researchers also observed activation of some areas, including the superior parietal lobule, which have been less frequently associated with pain in previous research.

ASL is a noninvasive magnetic resonance (MR) perfusion imaging technique for quantitatively measuring cerebral blood flow (CBF) by taking advantage of arterial water as a freely diffusible tracer. “While this study begins to uncover some of the basic physiology of the brain as it processes pain, more studies are needed to help us understand how the brain function may change over the course of treatment of pain and to examine the brain mechanisms by which pain improves,” Dr. Wasan said. “We are getting closer to describing, on an objective level, how the body and brain are reacting when a patient reports having more pain. We are hopeful that this could lead to an understanding of an individual patient’s neurocircuitry and that knowledge could lead to therapies that would be tailored to the individual.”

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94 (51.021575927734): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (65.088272094727): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
105 (61.03515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
106 (49.829483032227): 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=294736553 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (44.822692871094): 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=294736553 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
109 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
110 (44.822692871094): 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=294736553 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (487.08915710449): 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=294736553 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (650.88272094727): 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 (395.05958557129): 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=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
115 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
116 (55.074691772461): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
117 (78.916549682617): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
118 (50.067901611328): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
119 (36.001205444336): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
120 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
121 (38.14697265625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
122 (280.85708618164): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 20061.96975708): 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 (502.10952758789): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294736553 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294736553 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 8538.9614105225): ( 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 (144.00482177734): ( 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 (54.121017456055): 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 (30.994415283203): 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 (36.001205444336): 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 (27.894973754883): 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 (296.83113098145): 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 (101.08947753906): 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 (31.948089599609): 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 (27.894973754883): 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 (557.89947509766): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (506.87789916992): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (281.09550476074): SELECT name FROM jos_deeppockets WHERE id=212
138 (43.869018554688): SELECT name FROM jos_deeppockets WHERE id=212
139 (747.9190826416): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (499.01008605957): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
142 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
143 (!!!!! 12242.078781128): TRUNCATE TABLE jos_trademed_module
144 (98.943710327148): 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=294736553 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (53.882598876953): 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=294736553 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (923.87199401855): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (74.148178100586): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (74.148178100586): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
149 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
150 (!!!!! 1181.1256408691): 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 (52.928924560547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
152 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
153 (37.908554077148): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294736553 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294736553 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (34.093856811523): 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 (38.14697265625): 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 (66.041946411133): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (92.029571533203): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
158 (61.03515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736553 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736553 AND published='1' LIMIT 1
159 (41.961669921875): select jos_twitters.link from jos_twitters where cat=10
160 (31.948089599609): select jos_facebook.link from jos_facebook where cat=10
161 (33.140182495117): select jos_google_plus.link from jos_google_plus where cat=10
162 (31.948089599609): select jos_linkedin.link from jos_linkedin where cat=10
163 (350.9521484375): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (983.95347595215): insert into jos_banners_delta values (14615,'2025-06-26 22:14:19','216.73.216.249','view'),(14202,'2025-06-26 22:14:19','216.73.216.249','view'),(14203,'2025-06-26 22:14:19','216.73.216.249','view')