University of Twente Student Theses


Exploring the role of beta activity over the primary motor cortex in Motor Sequence Learning

Titsing, D. (2022) Exploring the role of beta activity over the primary motor cortex in Motor Sequence Learning.

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Abstract:Previous studies linked enlarged beta desynchronization during motor preparation and execution (movement-related beta desynchronization; MRBD) and enlarged beta synchronization during post-movement (post-movement beta rebound; PMBR) to motor control. However, what remains unclear is how both beta synchronization and desynchronization during motor are linked to MSL. Therefore, this thesis aimed to test whether beta activity over M1 reflects motor sequence learning. Furthermore, it aimed to test whether RT correlates with beta activity over M1. If there is a relationship between RT and Beta activity over M1, this would mean that it would be possible to predict when motor learning expertise would be gained. In this thesis, participants carried out a go/nogo DSP task. Event-related desynchronization and synchronization (ERD/S) values were extracted from three separate bands: β1 (12–17Hz), β2 (18–23Hz) and β3 (24–29Hz) in 100ms time windows for the motor preparation, motor execution and post-movement phase. The results revealed a larger β2 ERD post-training compared to pre-training during motor preparation. It was also revealed that there were no changes observed in MRBD. Based on the literature it was suggested that beta activity during motor execution may reflect task difficulty. Additionally, an enlarged post-movement beta rebound (PMBR) over M1 was observed for both the left and right hand in ß1 and the left hand in ß2 and ß3. This supports previous findings in which enlarged PMBR was linked to error-based motor sequence learning. Lastly, a positive relationship was observed between ß2 ERD/S over M1 for left-hand sequences in Block 5 and a negative relationship in Block 1. The relationship between ERD/S and RT should be further investigated in future research to confirm these findings.
Item Type:Essay (Master)
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:77 psychology
Programme:Psychology MSc (66604)
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