{"id":1830,"date":"2014-05-19T16:45:58","date_gmt":"2014-05-19T20:45:58","guid":{"rendered":"http:\/\/www.complejidadsocial.udd.cl\/?p=1830"},"modified":"2014-05-19T16:45:58","modified_gmt":"2014-05-19T20:45:58","slug":"irrelevant-stimulus-processing-in-adhd-catecholamine-dynamics-and-attentional-networks","status":"publish","type":"post","link":"https:\/\/gobierno.udd.cl\/cics\/2014\/05\/19\/irrelevant-stimulus-processing-in-adhd-catecholamine-dynamics-and-attentional-networks\/","title":{"rendered":"Irrelevant stimulus processing in ADHD: catecholamine dynamics and attentional networks"},"content":{"rendered":"<p>Francisco Aboitiz, Tom\u00e1s Osand\u00f3n, Francisco Zamorano, B\u00e1rbara Palma and Ximena Carrasco. Frontiers in Phychology. <span class=\"Apple-style-span\" style=\"color: #000000;\">01\/2014; 5:183. DOI:10.3389\/fpsyg.2014.00183<\/span><span style=\"color: #999999;\">.<\/span><\/p>\n<p><strong>ABSTRACT<\/strong><\/p>\n<p align=\"LEFT\">\u00a0<span style=\"font-size: small;\">A cardinal symptom of attention deficit and hyperactivity disorder(ADHD)is a general distractibility where children and adults shift their attentional focus to stimuli that are irrelevant to the ongoing behavior.This has been attributed to a deficit in dopaminergic signaling in cortico-striatal networks that regulate goal-directed behavior. Further more, recent imaging evidence points to an impairment of large scale, antagonistic brain networks that normally contribute to attentional engagement and disengagement, such as the task-positive networks and the default mode network (DMN). Related networks are the ventral attentional network(VAN)involved in attentional shifting, and the salience network (SN) related to task expectancy. Here we discuss the tonic\u2013phasicdynamics of catecholaminergic signaling in the brain, and attempt to provide a link between this and the activities of the large-\u00a0 scale cortical networks that regulate behavior. More specifically, we propose that a disbalance of tonic catecholamine levels during task performance produces an emphasis of phasic signaling and increased excitability of the VAN, yielding distractibility symptoms. Likewise, immaturity of the SN may relate to abnormal tonic signaling and an incapacity to build up a proper executive system during task performance. We discuss different lines of evidence includingp harmacology, brain imaging and electrophysiology, that are consistent with our proposal. Finally, restoring the pharmacodynamics of catecholaminergic signaling seems crucial to alleviate ADHD symptoms; however, the possibility is open to explore cognitive rehabilitation strategies to top-down modulate network dynamics compensating the pharmacological deficits. <\/span><\/p>\n<p><a href=\"https:\/\/gobierno.udd.cl\/cics\/files\/2014\/05\/fpsyg-05-00183.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85\" src=\"https:\/\/gobierno.udd.cl\/cics\/files\/2012\/07\/pdf-cics.jpg\" alt=\"PDF\" width=\"40\" height=\"40\" \/><\/a><\/p>\n<p><span style=\"font: 13px\/19.5px Arial, Verdana, sans-serif; text-align: left; color: #333333; text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; float: none; display: inline !important; white-space: normal; background-color: #ffffff; -webkit-text-stroke-width: 0px;\">Do not disseminate\/print without permission of copyright holder.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Francisco Aboitiz, Tom\u00e1s Osand\u00f3n, Francisco Zamorano, B\u00e1rbara Palma and Ximena Carrasco. Frontiers in Phychology. 01\/2014; 5:183. DOI:10.3389\/fpsyg.2014.00183. ABSTRACT \u00a0A cardinal symptom of attention deficit and hyperactivity disorder(ADHD)is a general distractibility where children and adults shift their attentional focus to stimuli that are irrelevant to the ongoing behavior.This has been attributed to a deficit in dopaminergic [&hellip;]<\/p>\n","protected":false},"author":9192218,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,5],"tags":[19,35,70,166,293,333,390],"class_list":["post-1830","post","type-post","status-publish","format-standard","hentry","category-papers","category-publications","tag-adhd","tag-attentional","tag-catecholamine","tag-dynamics","tag-networks","tag-processing","tag-stimulus"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Irrelevant stimulus processing in ADHD: catecholamine dynamics and attentional networks - Centro de Investigaci\u00f3n en Complejidad Social<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gobierno.udd.cl\/cics\/2014\/05\/19\/irrelevant-stimulus-processing-in-adhd-catecholamine-dynamics-and-attentional-networks\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Irrelevant stimulus processing in ADHD: catecholamine dynamics and attentional networks - Centro de Investigaci\u00f3n en Complejidad Social\" \/>\n<meta property=\"og:description\" content=\"Francisco Aboitiz, Tom\u00e1s Osand\u00f3n, Francisco Zamorano, B\u00e1rbara Palma and Ximena Carrasco. Frontiers in Phychology. 01\/2014; 5:183. DOI:10.3389\/fpsyg.2014.00183. 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