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Brain Region Can Be Stimulated To Reduce the Cognitive Deficits of Sleep Deprivation

By MedImaging staff writers
Posted on 25 Feb 2008
A research team has uncovered how stimulation of a specific brain region can help stave off the deficits in working memory, associated with extended sleep deprivation.

Working memory is a specific form of short-term memory that relates to the ability to store task-specific information for a limited timeframe, e.g., where one's car is parked in a huge mall lot or remembering a phone number for few seconds before writing it down. It has long been established that cognitive performance, such as working memory, declines with sleep deprivation.

"We are excited about the possibilities of using brain stimulation to improve cognitive function,” said Bruce Luber, Ph.D., lead author of the study and an instructor in clinical psychiatry at Columbia University College of Physicians & Surgeons (New York, NY, USA). "We recently published a study in which we were able to improve the working memory performance of young adults for the first time and this new study extends our findings.”

"In this research, we were able to noninvasively manipulate a brain network identified by imaging to partially remediate the effects of sleep deprivation using repetitive transcranial magnetic stimulation [rTMS], which has already shown promise in treating depression and other disorders," said Sarah H. Lisanby, M.D., senior author of the study and co-principal investigator of the research funded by a Defense Advanced Research Projects Agency (DARPA; Arlington, VA, USA) grant.

The study's findings were published online on January 17, 2008 in Cerebral Cortex. In an earlier study, the investigators identified a sleep deprivation network of brain areas that was active during the performance of a working memory task. Expression of this network was reduced following sleep deprivation. They also found a relationship between reduced expression of this network following sleep deprivation and poorer performance on the working memory task.

In the study, 15 young, healthy individuals underwent sleep deprivation for 48 hours. Working memory was tested using a letter recognition test, known as the delayed match to sample (DMS) task, in which subjects have to recall as quickly as possible whether a letter was included in a set of letters they had just seen. Participants performed this task during functional magnetic resonance imaging (fMRI) sessions both before sleep deprivation and at the conclusion of the sleep deprivation period.

The researchers used repetitive rTMS to test whether stimulation of three brain regions in the previously identified network following the sleep deprivation period could improve performance on the working memory task. rTMS administers a rapid sequence of magnetic pulses to a specific brain area.

Results showed that stimulation at a site over left lateral occipital cortex, a prominent part of the brain network identified with fMRI, resulted in a reduction of sleep-induced slower reaction time without a corresponding decrease in accuracy. This improvement in performance was most marked in those individuals who showed the greatest reduction in the expression of the brain network following sleep deprivation.

These present findings are consisted with the concept of cognitive reserve because some participants suffered larger deficits in working memory performance due to sleep deprivation, while others were much less affected. These susceptibility differences were related to differential expression of a brain network.

This suggests that the activity of the sleep deprivation network exhibited properties of neural reserve, where a greater capacity or efficiency in the network allowed some individuals to maintain performance in the face of sleep deprivation. Moreover, these results suggest that rTMS was able to somehow enhance the network activity in those who were not able to maintain performance, artificially facilitating neural reserve.


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92 (50.067901611328): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (46.968460083008): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (33.855438232422): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (32.901763916016): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (33.855438232422): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (37.193298339844): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (41.007995605469): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (40.054321289062): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (107.0499420166): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
105 (70.810317993164): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
106 (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.cat=10 AND dp.id=272510000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (66.041946411133): 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=272510000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (75.817108154297): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
109 (44.822692871094): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
110 (74.863433837891): 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=272510000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (696.89750671387): 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=272510000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (581.02607727051): 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 (391.96014404297): 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 (141.85905456543): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
115 (63.896179199219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
116 (92.983245849609): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
117 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
118 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
119 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
120 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
121 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
122 (344.99168395996): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 19778.01322937): 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 (545.97854614258): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=272510000 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=272510000 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 7309.9136352539): ( 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 (66.995620727539): ( 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 (37.193298339844): 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 (29.087066650391): 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 (40.054321289062): 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 (55.074691772461): 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 (267.98248291016): 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 (37.193298339844): 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 (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
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 (470.87669372559): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (319.9577331543): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (36.001205444336): SELECT name FROM jos_deeppockets WHERE id=212
138 (61.988830566406): SELECT name FROM jos_deeppockets WHERE id=212
139 (544.07119750977): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (437.02125549316): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
142 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
143 (!!!!! 10992.050170898): TRUNCATE TABLE jos_trademed_module
144 (107.0499420166): 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=272510000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (58.889389038086): 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=272510000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (778.9134979248): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (52.928924560547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (112.05673217773): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
149 (60.081481933594): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
150 (!!!!! 1159.9063873291): 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 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
152 (47.206878662109): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
153 (51.021575927734): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=272510000 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=272510000 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 (32.186508178711): 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 (34.809112548828): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (118.01719665527): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
158 (50.067901611328): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=272510000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=272510000 AND published='1' LIMIT 1
159 (37.908554077148): select jos_twitters.link from jos_twitters where cat=10
160 (31.948089599609): select jos_facebook.link from jos_facebook where cat=10
161 (32.186508178711): select jos_google_plus.link from jos_google_plus where cat=10
162 (32.901763916016): select jos_linkedin.link from jos_linkedin where cat=10
163 (308.99047851562): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1202.1064758301): insert into jos_banners_delta values (14615,'2025-06-30 22:51:31','216.73.216.249','view'),(14202,'2025-06-30 22:51:31','216.73.216.249','view'),(14203,'2025-06-30 22:51:31','216.73.216.249','view')