Transcranial Direct Current Stimulation (tDCS)

In the world of neurostimulation, transcranial direct current stimulation or tDCS uses constant, low current delivered directly to the area of interest via small electrodes.

Operation
Transcranial direct current stimulation works by sending constant, low direct current through the electrodes. When these electrodes are placed in the region of interest, the current induces intracerebral current flow. This current flow then either increases or decreases the neuronal excitability in the specific area being stimulated based on which type of stimulation is being used. This change of neuronal excitability leads to alteration of brain function.

Cathodal stimulation (decreased excitability) of the right anterior temporal lobe (ATL) together with anodal stimulation (increased excitability) or the right ATL will increase INT. Conversely, cathodal stimulation of the left ATL together with anodal stimulation of the left ATL will result in an increase PSI.

Components
Components are general. Actual components needed will be dictated by each Schematic and its effectiveness.
 * 1) Electrode (x2) :: Two electrodes are necessary to create the direct current between them.
 * 2) Current Regulator (x1) :: Common component that regulates the flow of electricity.
 * 3) Control Software (x1) :: Governs the current regulator.

Applications
Many helmets will have tDCS manufactured into the device itself. Any helmets or headgear with the requisite available slots can be modified with a tDCS mod.

See Also
 * Transcranial Magnetic Stimulation (TMS)

Resources

 * 1) "Transcranial Direct Current Stimulation"  Wikipedia, The Free Encyclopedia. Wikimedia Foundation, Inc. 31 March 2011. 10 April 2011.
 * 2) Facilitate Insight by Non-Invasive Brain Stimulation Chi RP, Snyder AW, 2011. PLoS ONE 6(2): e16655. doi:10.1371/journal.pone.0016655