First identification of brain鈥檚 preparation for action

Predicting skilled performance from preparation

Neuroscientists at 91快活林 and University College London (UCL) have for the first time, identified the processes which occur in our brains milliseconds before we undertake a series of movements, crucial for speech, handwriting, sports or playing a musical instrument. They have done so by measuring tiny magnetic fields outside the participants鈥� head and identifying unique patterns making up each sequence before it is executed. They identified differences between neural patterns which lead to a more skilled as opposed to a more error-prone execution.

The research showed that the brain prepares sequences by 鈥榮tacking鈥� the first to last elements and that individuals who conducted accurate sequences were more likely to 鈥檚tack鈥� the elements correctly before they made the first movement. The research showed that the brain prepares sequences by 鈥榮tacking鈥� the first to last elements and that individuals who conducted accurate sequences were more likely to 鈥檚tack鈥� the elements correctly before they made the first movement.The , funded by the Wellcome Trust, is published in Neuron Issue date 7 February 2019 (). Following further research, this new information could lead to the development of interventions which would assist with rehabilitation post-stroke or improve life for people living with stutter, dyspraxia or other similar conditions.

Lead author Dr Katja Kornysheva, of 91快活林鈥檚 School of Psychology explained the significance of the findings:

鈥淯sing a non-invasive technique which measures ongoing brain activity on a millisecond-by-millisecond basis, we were able to track brain activity as participants prepared and then moved their fingers from memory. This revealed that the brain prepares for complex actions in the milliseconds beforehand by 鈥榮tacking鈥� the actions to be taken, in the correct order.鈥�

鈥淩eviewing the brain impulses, we could see that when participants were producing the sequences correctly and accurately, with no errors, each activity was spaced and ordered in advance of being executed. However, when mistakes occurred, the 鈥榪ueuing鈥� of actions was visibly less well-defined as separate and distinct actions. It appears that the more closely bunched and less-defined 鈥榪ueuing鈥� was, the more participants committed errors in sequence production and timing.

Co- researcher and author, Prof Neil Burgess,  of UCL鈥檚 Inst of Cognitive Neuroscience commented:

鈥淭o our surprise we also found that this preparatory pattern is primarily reflecting a template for position (1st, 2nd, 3rd and so on) which can be reused across sequences 鈥� like cabinet drawers into which one can put different objects. This is a way for the brain to be efficient and flexible, by providing a blueprint for new sequences and staying organized.鈥�

鈥淯nfortunately, disorders of sequence control and fluency can severely disrupt everyday life 鈥� with no treatment being predictively effective. Eventually, this research could lead to the development of 鈥榓s it happens鈥� decoders which would provide instant feed-back to the user. This could help to 鈥榯rain鈥� their brains to create the correct preparation state and overcome difficulties such as a stutter or dyspraxia. We hope that the new understanding could also lead to the development of improved brain computer interfaces, used by people who are 鈥榣ocked- in鈥� or have whole body paralysis.鈥�

Publication date: 7 February 2019