TRANSCRANIAL DIRECT CURRENT STIMULATION (tDCS)
tDCS is a safe, non-invasive brain stimulation method that can be used to regulate emotion, enhance cognition and help recover function by affecting the neural firing threshold and triggering the activation and deactivation of selected brain areas.
During a tDCS session weak electrical currents (0.1- 2mA) are passed through the brain via electrodes placed on the scalp. A positive electrode (anode) is used to increase the excitability of the neurons under the stimulated area, and a negative pole (cathode) is used to decrease the excitability of the neurons under the stimulated area.
The uplifting effects of tDCS on mood, and on improving the symptoms of depression are well documented, and its success in cognitive “brightening”, i.e. in improving working memory, maths ability and reading skills is supported by solid scientific evidence. Recently, tDCS has gained great popularity in neurorehabilitation and in stroke recovery.
tACS is a safe, gentle and highly specific tool for modifying cortical information processing, improving communication and coordination between brain areas, and regulation of affect and cognition.
TACS works through administering low-intensity sinusoidal electrical current to the brain through electrodes on the scalp at selected frequencies in the range of 0.001 Hz -1000 Hz. This stimulation can be tuned to match the various oscillatory frequencies naturally produced by the brain and can be used to boost the brain’s own oscillations, to treat disease or enhance brain function.
TRANSCRANIAL RANDOM NOISE STIMULATION (tRNS)
tRNS is electrical stimulation with a range of randomised frequencies that has the capacity to increase cortical flexibility, enhance processing and improve function.
It has been hypothesised that introducing noise to a complex system, such as the human brain, may push it towards a state of criticality- a state, in which both order and chaos are accessible, and phase (and state) transitions, and hence self-re-organisation are possible/more likely to happen. You can read more on criticality here.
An additional benefit of adding random noise to a system is predicted by the theory of stochastic resonance. Stochastic resonance is a phenomenon of signal amplification through adding noise in non-linear systems. Since the brain is largely a non-linear system, adding noise (energy) to it, has the potential to enhance weak signals, that would otherwise lack the power to reach a processing threshold. This amplification may therefore contribute to optimising functions such as focus, memory and processing.
At the Bright Brain Centre, we utilise non-invasive electrical brain stimulation as a standalone method to improve mood and emotion regulation, to induce relaxation and to aid performance during specific cognitive and emotion regulation tasks. We also apply it in combination with neurofeedback training to speed up training progress.
Our stimulation is real time EEG and qEEG LORETA-guided and our protocols are 100% personalised to match each individual’s brain profile, their individual needs and perceptual thresholds.
More information on who can we help can be found here.