TY - JOUR
T1 - The Effect of Caffeine on Movement-Related Cortical Potential Morphology and Detection
AU - Jochumsen, Mads
AU - Lavesen, Emma Rahbek
AU - Griem, Anne Bruun
AU - Falkenberg-Andersen, Caroline
AU - Jensen, Sofie Kirstine Gedsø
PY - 2024/6/20
Y1 - 2024/6/20
N2 - Movement-related cortical potential (MRCP) is observed in EEG recordings prior to a voluntary movement. It has been used for e.g., quantifying motor learning and for brain-computer interfacing (BCIs). The MRCP amplitude is affected by various factors, but the effect of caffeine is underexplored. The aim of this study was to investigate if a cup of coffee with 85 mg caffeine modulated the MRCP amplitude and the classification of MRCPs versus idle activity, which estimates BCI performance. Twenty-six healthy participants performed 2 × 100 ankle dorsiflexion separated by a 10-min break before a cup of coffee was consumed, followed by another 100 movements. EEG was recorded during the movements and divided into epochs, which were averaged to extract three average MRCPs that were compared. Also, idle activity epochs were extracted. Features were extracted from the epochs and classified using random forest analysis. The MRCP amplitude did not change after consuming caffeine. There was a slight increase of two percentage points in the classification accuracy after consuming caffeine. In conclusion, a cup of coffee with 85 mg caffeine does not affect the MRCP amplitude, and improves MRCP-based BCI performance slightly. The findings suggest that drinking coffee is only a minor confounder in MRCP-related studies.
AB - Movement-related cortical potential (MRCP) is observed in EEG recordings prior to a voluntary movement. It has been used for e.g., quantifying motor learning and for brain-computer interfacing (BCIs). The MRCP amplitude is affected by various factors, but the effect of caffeine is underexplored. The aim of this study was to investigate if a cup of coffee with 85 mg caffeine modulated the MRCP amplitude and the classification of MRCPs versus idle activity, which estimates BCI performance. Twenty-six healthy participants performed 2 × 100 ankle dorsiflexion separated by a 10-min break before a cup of coffee was consumed, followed by another 100 movements. EEG was recorded during the movements and divided into epochs, which were averaged to extract three average MRCPs that were compared. Also, idle activity epochs were extracted. Features were extracted from the epochs and classified using random forest analysis. The MRCP amplitude did not change after consuming caffeine. There was a slight increase of two percentage points in the classification accuracy after consuming caffeine. In conclusion, a cup of coffee with 85 mg caffeine does not affect the MRCP amplitude, and improves MRCP-based BCI performance slightly. The findings suggest that drinking coffee is only a minor confounder in MRCP-related studies.
KW - Adult
KW - Brain-Computer Interfaces
KW - Caffeine/pharmacology
KW - Coffee/chemistry
KW - Electroencephalography/methods
KW - Female
KW - Humans
KW - Male
KW - Movement/drug effects
KW - Young Adult
KW - movement intention
KW - brain-computer interface
KW - EEG
KW - movement-related cortical potential
KW - bereitschaftspotential
KW - caffeine
KW - coffee
KW - contingent negative variation
UR - http://www.scopus.com/inward/record.url?scp=85197113068&partnerID=8YFLogxK
U2 - 10.3390/s24124030
DO - 10.3390/s24124030
M3 - Journal article
C2 - 38931814
SN - 1424-8220
VL - 24
JO - Sensors (Basel, Switzerland)
JF - Sensors (Basel, Switzerland)
IS - 12
M1 - 4030
ER -