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DTI-MRI Reveals Alzheimer’s-Like Brain Abnormalities in Concussion Patients

By MedImaging International staff writers
Posted on 26 Jun 2013
The distribution of white matter brain abnormalities in some patients after mild traumatic brain injury (MTBI) is very similar to that found in early Alzheimer’s dementia.

The study’s findings were published online June 2013 in the journal Radiology. “Findings of MTBI bear a striking resemblance to those seen in early Alzheimer’s dementia,” said the study’s lead author, Saeed Fakhran, MD, assistant professor of radiology in the division of neuroradiology at the University of Pittsburgh School of Medicine (PA, USA). “Additional research may help further elucidate a link between these two disease processes.”

MTBI, or concussion, are by no means mild, with approximately 15% of concussion patients suffering persistent neurologic symptoms. “Sleep-wake disturbances are among the earliest findings of Alzheimer’s patients, and are also seen in a subset of MTBI patients,” Dr. Fakhran said. “Furthermore, after concussion, many patients have difficulty filtering out white noise and concentrating on the important sounds, making it hard for them to understand the world around them. Hearing problems are not only an independent risk factor for developing Alzheimer’s disease, but the same type of hearing problem seen in MTBI patients has been found to predict which patients with memory problems will go on to develop Alzheimer’s disease.”

For the study, Dr. Fakhran and colleagues tried to determine if there was an association between white matter injury patterns and severity of post-concussion symptoms in MTBI patients with normal findings on standard magnetic resonance imaging (MRI) scans. The researchers evaluated data from imaging exams performed on 64 MTBI patients and 15 control patients, using a sophisticated MRI technique called diffusion tensor imaging (DTI), which identifies microscopic alterations in the brain’s white matter.

Diffusion tensor imaging produces a measurement (fractional anisotropy) of the movement of water molecules along axons. In healthy white matter, the direction of water movement is fairly uniform and measures high in fractional anisotropy. When water movement is more random, fractional anisotropy values decrease.

Of the MTBI patients, 42 (65.6%) were men, and the mean age was 17. Sports injury was the reason for concussion in two-thirds of the patients. All patients underwent neurocognitive evaluation with Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT). The researchers analyzed correlation between fractional anisotropy values, the ImPACT total symptom score, and findings of sleep-wake disturbances.

Sleep-wake disturbances are among the most disabling postconcussive symptoms, directly decreasing quality of life and productivity and magnifying postconcussion memory and social dysfunction. The findings revealed a substantial correlation between high ImPACT total symptom score and reduced fractional anisotropy at the gray-white junction, most prominently in the auditory cortex. Significantly, decreased fractional anisotropy was found in patients with sleep-wake disturbances in the parahippocampal gyri comparative to patients without sleep-wake disturbances.

“When we sleep, the brain organizes our experiences into memories, storing them so that we can later find them,” Dr. Fakhran said. “The parahippocampus is important for this process, and involvement of the parahippocampus may, in part, explain the memory problems that occur in many patients after concussion.”

The findings suggest, according to Dr. Fakhran, that the real problem facing concussion patients may not be the injury itself, but instead the brain’s response to that injury. “Traditionally, it has been believed that patients with MTBI have symptoms because of abnormalities secondary to direct injury,” he said. “Simply put, they hit their head, damaged their brain at the point of trauma, and thus have symptoms from that direct damage. Our preliminary findings suggest that the initial traumatic event that caused the concussion acts as a trigger for a sequence of degenerative changes in the brain that results in patient symptoms and that may be potentially prevented. Furthermore, these neurodegenerative changes are very similar to those seen in early Alzheimer’s dementia.”

The researchers hope that these findings may lead to improved treatments in the future. “The first step in developing a treatment for any disease is understanding what causes it,” Dr. Fakhran said. “If we can prove a link, or even a common pathway, between MTBI and Alzheimer’s, this could potentially lead to treatment strategies that would be potentially efficacious in treating both diseases.”

Related Links:

University of Pittsburgh School of Medicine



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87 (50.783157348633): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294746967 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
88 (28.848648071289): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294746967 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
89 (31.948089599609): SELECT id,name,title FROM jos_deeppockets WHERE cat=10 AND TYPE='file_folder' AND published=1 AND id != 294743300 AND id != 294743301 AND id != 294743302 AND id != 294743303 AND id != 294743304 AND id != 294743305 AND id != 294743306 AND id != 294743307 AND id != 294743308 AND id != 294743309 AND id != 294743310 AND metakey != 'aacc' ORDER BY `ordering`
90 (51.975250244141): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (24.795532226562): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (32.186508178711): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (31.948089599609): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (72.956085205078): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (65.088272094727): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
105 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
106 (!!!!! 4498.0049133301): 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=294746967 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (123.02398681641): 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=294746967 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (101.80473327637): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
109 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
110 (57.93571472168): 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=294746967 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (459.90943908691): 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=294746967 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (560.04524230957): 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 (473.97613525391): 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 (85.115432739258): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
115 (63.896179199219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
116 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
117 (54.121017456055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
118 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
119 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
120 (68.902969360352): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
121 (52.928924560547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
122 (215.05355834961): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 88306.188583374): 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 (!!!!! 3086.0900878906): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294746967 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294746967 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 29959.917068481): ( 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 (!!!!! 2989.0537261963): ( 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 (!!!!! 6720.0660705566): 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 (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
129 (253.91578674316): 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 (33.855438232422): 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 (191.21170043945): 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 (31.948089599609): 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 (184.05914306641): 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 (49.829483032227): 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 (350.9521484375): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (!!!!! 10341.167449951): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (361.20414733887): SELECT name FROM jos_deeppockets WHERE id=212
138 (!!!!! 4321.0983276367): SELECT name FROM jos_deeppockets WHERE id=212
139 (794.88754272461): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (!!!!! 2583.9805603027): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (!!!!! 2031.8031311035): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
142 (61.03515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
143 (!!!!! 11719.942092896): TRUNCATE TABLE jos_trademed_module
144 (!!!!! 1655.101776123): 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=294746967 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (78.916549682617): 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=294746967 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (612.97416687012): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (155.92575073242): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (140.90538024902): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
149 (85.830688476562): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
150 (!!!!! 1239.0613555908): 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 (123.97766113281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
152 (44.822692871094): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
153 (880.95664978027): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294746967 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294746967 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 (27.894973754883): 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 (36.001205444336): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (!!!!! 3206.0146331787): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
158 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746967 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746967 AND published='1' LIMIT 1
159 (180.00602722168): select jos_twitters.link from jos_twitters where cat=10
160 (37.193298339844): select jos_facebook.link from jos_facebook where cat=10
161 (29.087066650391): select jos_google_plus.link from jos_google_plus where cat=10
162 (27.179718017578): select jos_linkedin.link from jos_linkedin where cat=10
163 (539.06440734863): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 5565.881729126): insert into jos_banners_delta values (14615,'2025-06-25 07:38:23','216.73.216.120','view'),(14202,'2025-06-25 07:38:23','216.73.216.120','view'),(14203,'2025-06-25 07:38:23','216.73.216.120','view')