Published online by Cambridge University Press: 05 December 2011
Summary
Noninvasive brain stimulation with transcranial magnetic stimulation (TMS) or transcranial direct current stimulation (tDCS) is valuable in research and has potential therapeutic applications in cognitive neuroscience, neurophysiology, psychiatry, neurology and neurorehabilitation. TMS and tDCS allow diagnostic and interventional neurophysiology applications, targeted neuropharmacology delivery and systematic exploration of local cortical plasticity and brain network dynamics. Repetitive TMS or tDCS can modulate cortical excitability of the directly targeted brain region beyond the duration of the brain stimulation train by the induction of phenomena similar to long-term potentiation (LTP) or long-term depression (LTD), which may increase or decrease cortical excitability respectively. The effects of TMS or tDCS do not remain limited to the targeted brain region, and thus disruption of brain activity by TMS or tDCS can result in behavioural facilitation via distant cortical or subcortical structures. In addition, state-dependent effects of noninvasive brain stimulation condition the impact of TMS and tDCS and may result in paradoxical behavioural effects of the stimulation. Greater understanding of the neurobiological mechanisms involved in such intances may allow us to systematically use TMS or tDCS to leverage paradoxical functional facilitation for therapeutic applications.
Introduction
In the past decades, neuroimaging techniques such as computerized tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), magnetoencephalography (MEG) and electro-encephalography (EEG) have shaped the ways in which we model behaviour. Anatomical neuroimaging techniques produce ever more detailed descriptions of the extent of lesions produced by brain injury.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.