Subject: [The vOICe] Mechanisms of cross-modal plasticity in early-blind subjects To: [email protected]
Hi All, For your information. Appended is the abstract of a new publication this month in the Journal of Neurophysiology. Best wishes, Peter Meijer Seeing with Sound - The vOICe http://www.seeingwithsound.com/winvoice.htm Mechanisms of cross-modal plasticity in early-blind subjects. Abstract. A variety of studies have demonstrated enhanced blood oxygenation level dependent responses to auditory and tactile stimuli within occipital cortex as a result of early blindness. However, little is known about the organizational principles that drive this cross-modal plasticity. We compared BOLD responses to a wide variety of auditory and tactile tasks (vs. rest) in early-blind and sighted subjects. As expected, cross-modal responses were larger in blind than in sighted subjects in occipital cortex for all tasks (cross-modal plasticity). Within both blind and sighted subject groups, we found patterns of cross-modal activity that were remarkably similar across tasks: a large proportion of cross-modal responses within occipital cortex are neither task nor stimulus specific. We next examined the mechanisms underlying enhanced BOLD responses within early-blind subjects. We found that the enhancement of cross-modal responses due to early blindness was best described as an additive shift, suggesting that cross-modal plasticity within blind subjects does not originate from either a scaling or unmasking of cross-modal responsivities found in sighted subjects. By Lindsay B. Lewis, Melissa Saenz and Ione Fine. Source URL: http://jn.physiology.org/content/104/6/2995 To unsubscribe, send a blank e-mail to [email protected] with "unsubscribe" (without the quotes) in the subject line. To subscribe again, send a blank e-mail to [email protected] with "subscribe" in the subject line, and next reply to the confirmation message. -- shushant bendre physio therepist from pune camp mobil :9373798593 e mail id same above or shan .dpt @hotmail.com also skype id -:dr.shushant [Vh] thanque for reeding this mail {ammabhagavansharenum} To unsubscribe send a message to [email protected] with the subject unsubscribe. To change your subscription to digest mode or make any other changes, please visit the list home page at http://accessindia.org.in/mailman/listinfo/accessindia_accessindia.org.in
