EEG and transcranial stimulation

The EEG (electroencephalogram) is the measurement of a person’s brainwaves, performed by attaching small metal electrodes to the scalp. It is the only viable approach by which real-time information can be collected about the brain in a portable manner. There are still major challenges in exploiting this technology, using it to create new applications and "killer apps", and in devising new signal processing approaches for obtaining better performance.

Our work spans:

  • Running EEG and transcranial stimulation experiments
  • Creating new real-time signal processing algorithms
  • Implementing algorithms in low power custom designed microchips

Video overview

Low power signal processing for novel neurotechnology

Dr Alex Casson

From: IET Healthcare network Annual Lecture and Award giving ceremony, 21st November 2013, London

Our approach

Brain monitoring used to be confined to lab environments. Wearable EEG means this is no longer the case: we can monitor the brain easily, in a range of situations. We are using wearable EEG to explore the new applications of brain interfacing that are now possible.

In particular, we are making closed loop EEG devices. Our focus is on feedback and how we change the environment and the user in response to their brainwaves. To do this, we carry out EEG experiments and design novel signal analysis approaches. As one example, we have explored noise enhanced signal processing. These algorithms have better performance in the presence of recording noise - a major advantage when processing small, noise contaminated signals like the EEG. 


transcranial Current Stimulation

  • To feedback directly to users we are exploring how transcranial Current Stimulation (tCS) - where we inject small amounts of current into the head - affects working memory performance, and how simultaneous EEG+tCS can be used to improve the stimulation parameters.

 Virtual environments

  • To feedback through the environment we are exploring neuromarketing and how to change virtual shops in real-time, in response to the user's brainwaves.

Both feedback technologies are underpinned by our skills in designing signal processing algorithms, and hardware for implementing algorithms for wearable sensor nodes.


Keep up to date with our publications and high impact research outputs

Join us

Are you interested in working on next generation non-invasive neurotechnology? We have lots of exciting upcoming work: carrying out hands on experiments with EEG and tCS devices, exploring virtual environments using the Oculus Rift, and designing and implementing signal processing algorithms. To do so:

  1. Explore our funding opportunities
  2. Get in touch

Project main investigator: Dr Casson

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