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Research Reveals Clues into Brain's Response to Distress, Unexpected Events

By MedImaging International staff writers
Posted on 03 Dec 2009
In a new study, psychologists are able to see in detail for the first time how various regions of the human brain respond when people experience an unexpected or traumatic event. The study could lead to the creation of biologic gauges that could identify individuals with posttraumatic stress disorder (PTSD) or identify PTSD sufferers who would benefit from specific treatments.

In the study, researchers from the University of Alabama at Birmingham (UAB; USA) utilized functional magnetic resonance imaging (fMRI) to see how activity in the area of the brain associated with fear, learning, and memory respond when research participants were startled by a loud static sound and when they were able to correctly predict when the sound would occur.

"When the noise is unexpected, the brain's response is larger,” said UAB psychologist David Knight, Ph.D., lead investigator of the study, which is currently published in the online version of the journal NeuroImage. "But when participants are able to predict when they are going to hear the unpleasant static noise, you can see the regions of the brain quiet down so that a smaller emotional response is produced. While past studies have looked at this startle phenomenon behaviorally, this is the first look at what is actually happening in these regions of the brain when someone is exposed to an unpleasant, unpredictable event.”

In the study, UAB psychologists placed 15 healthy adults in an fMRI scanner and asked them to listen to a series of low- and high-pitched tones. Some tones predicted a loud static sound would follow, whereas other tones predicted that the static sound would not occur. During the study, participants were asked to rate the tones between 0 and 100; 0 if they did not expect to hear the static sound, 100 if the static sound was expected, and 50 if they could not make a prediction.

Moreover, the researchers measured the participants' skin responses such as sweaty palms to determine how much the participants were physically bothered by the static noise. The researchers then correlated the skin and brain responses to assess how brain activity influences emotional expression.

An analysis of the fMRI brain scans showed that unpleasant events produced activity within the frontal lobe of the brain. The amount of activity was reduced when participants expected the unpleasant event, but not when the event was unexpected. Further, the amount of activity within these brain regions controlled the emotional response that was expressed.

"These findings are a first step in identifying techniques and procedures that will allow us in future studies to go in and look at patient populations and better understand how their brains respond to negative or unpleasant stimuli,” Dr. Knight said. "Those studies will hopefully lead to other studies in which we can perhaps try different medications with these individuals and see if that alters their brains to aversive stimuli. With that information, we can start to develop biological markers using fMRI that may help us better identify and treat different types of disorders.”

The UAB is a separate, independent institution from the University of Alabama, which is based in Tuscaloosa.

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University of Alabama at Birmingham


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94 (51.021575927734): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (40.054321289062): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (32.901763916016): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (32.901763916016): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
105 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
106 (55.074691772461): 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=294726721 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (49.114227294922): 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=294726721 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (108.95729064941): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
109 (89.168548583984): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
110 (70.095062255859): 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=294726721 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (558.13789367676): 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=294726721 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (671.1483001709): 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 (417.94776916504): 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 (119.20928955078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
115 (85.830688476562): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
116 (95.129013061523): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
117 (54.121017456055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
118 (68.902969360352): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
119 (40.054321289062): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
120 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
121 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
122 (334.9781036377): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 21746.873855591): 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 (750.06484985352): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294726721 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294726721 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 8628.8452148438): ( 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 (99.897384643555): ( 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 (61.988830566406): 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 (41.961669921875): 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 (96.08268737793): 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 (36.954879760742): 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 (355.95893859863): 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 (50.067901611328): 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 (40.054321289062): 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 (29.087066650391): 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 (497.81799316406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (343.08433532715): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (226.02081298828): SELECT name FROM jos_deeppockets WHERE id=212
138 (31.948089599609): SELECT name FROM jos_deeppockets WHERE id=212
139 (608.92105102539): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (476.12190246582): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (140.90538024902): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
142 (75.101852416992): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
143 (!!!!! 9600.8777618408): TRUNCATE TABLE jos_trademed_module
144 (133.03756713867): 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=294726721 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (72.002410888672): 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=294726721 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (868.08204650879): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (53.167343139648): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (90.837478637695): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
149 (43.153762817383): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
150 (!!!!! 1178.0261993408): 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 (62.942504882812): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
152 (39.815902709961): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
153 (32.901763916016): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294726721 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294726721 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (30.040740966797): 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 (33.855438232422): 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 (35.04753112793): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
158 (63.180923461914): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294726721 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294726721 AND published='1' LIMIT 1
159 (36.001205444336): select jos_twitters.link from jos_twitters where cat=10
160 (30.040740966797): select jos_facebook.link from jos_facebook where cat=10
161 (31.948089599609): select jos_google_plus.link from jos_google_plus where cat=10
162 (30.994415283203): select jos_linkedin.link from jos_linkedin where cat=10
163 (283.95652770996): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1277.9235839844): insert into jos_banners_delta values (14615,'2025-06-28 17:45:34','216.73.216.249','view'),(14202,'2025-06-28 17:45:34','216.73.216.249','view'),(14203,'2025-06-28 17:45:34','216.73.216.249','view')