10_20_pos_man_v1_0_pdf. Neuropsychologia - Electrified minds: Transcranial direct current stimulation (tDCS) and Galvanic Vestibular Stimulation (GVS) as methods of non-invasive brain stimulation in neuropsychology—A review of current data and future implications. Abstract Transcranial direct current stimulation (tDCS) is a noninvasive, low-cost and easy-to-use technique that can be applied to modify cerebral excitability. This is achieved by weak direct currents to shift the resting potential of cortical neurons.
These currents are applied by attaching two electrodes (usually one anode and one cathode) to distinct areas of the skull. Galvanic Vestibular Stimulation (GVS) is a variant of tDCS where the electrodes are attached to the mastoids behind the ears in order to stimulate the vestibular system. tDCS and GVS are safe when standard procedures are used. We describe the basic physiological mechanisms and application of these procedures. Abbreviations Keywords Brain stimulation; Direct current stimulation; Neurocognition; Galvanic Vestibular Stimulation; Neuroplasticity Copyright © 2010 Elsevier Ltd. Dorsolateral prefrontal cortex. Psychlopedia -- Key concepts -- Biological concepts -- Dorsolateral prefrontal cortex Jump to the comments Section Overview The dorsolateral prefrontal cortex, together with other connected areas, is assumed to be important in working memory and executive function--including the regulation of thinking and action.
Damage to this region provokes dysexecutive syndrome. Roles of the dorsolateral prefrontal cortex and ventrolateral prefrontal cortex The difference between the dorsolateral prefrontal cortex and the ventrolateral prefrontal cortex aligns to the disparity between the dorsal and ventral pathways in the cortex, according to O'Reilly (2010).
The dorsal pathways, which is primarily underpinned by the parietal cortex, attempts to ascertain which responses should be executed, called the how system. The dorsal pathways primarily terminate in the dorsolateral prefrontal cortex instead of the ventrolateral prefrontal cortex. Consequences of deficits in dorsolateral prefrontal cortex Memory. PREFRONTAL CORTEX [brmlab] However, the overall picture of prefrontal cortex function presented here leads to a conceptualization of a cognitive processing hierarchy that proceeds along an anterior to posterior gradient, from a) representations of stimulus value in the OFC and rostral MPFC, to b) processing of internal goal and task-hierarchy representations in the ALPFC, c) top-down biasing of stimulus representation in posterior cortices by DLPFC, d) representation and updating of specific stimulus-response mapping rules in IFJ and lateral premotor cortex, e) the motivated planning of overt motor behavior in pre-SMA and cingulate motor areas, and f) the actual production of behavior in primary motor cortex.
This notion of hierarchy is present in related forms in several current models of prefrontal function (e.g. Christoff & Keramatian, 2007; Koechlin et al., 2003). Short frontal lobe connections of the human brain. Anodal transcranial direct current stimulation of prefrontal cortex enhances working memory.