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Brain activity preceding a 2D manual catching task.

Mario Tombini¹, Filippo Zappasodi, Loredana Zollo

¹Clinica Neurologica, Università Campus Biomedico, Rome, Italy. m.tombini@unicampus.it

|April 25, 2009

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This study reveals how brain rhythms change during object catching. Motor learning is linked to reduced theta synchronization in the anterior cingulate cortex and shifts in alpha band activation.

Area of Science:

Neuroscience
Motor Control
Human EEG

Background:

Cortical electroencephalography (EEG) rhythms exhibit event-related desynchronization (ERD) and synchronization (ERS).
Understanding EEG changes during motor preparation is crucial for motor control research.

Purpose of the Study:

To investigate EEG ERD and ERS patterns in specific brain regions during a 2D manual object catching task.
To correlate changes in cortical rhythms with motor performance and learning during interception tasks.

Main Methods:

Recorded 32-channel EEG from eleven healthy subjects performing a 2D catching task with a moving object.
Compared EEG data across different conditions: catching (pre and post-training), reaching, and gaze tracking.
Analyzed EEG power changes in alpha and beta bands, and theta synchronization, correlating them with kinematic data.

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Functional Near Infrared Spectroscopy of the Sensory and Motor Brain Regions with Simultaneous Kinematic and EMG Monitoring During Motor Tasks

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Main Results:

A more pronounced ERD in alpha 2 and beta bands was observed in the sensorimotor region contralateral to the catching hand during the catching task.
Reaching tasks showed bilateral ERD in the beta band.
Motor learning and automatization correlated with reduced theta ERS in the anterior cingulate cortex and a shift in alpha 2 band activation.

Conclusions:

Different motor strategies (predictive vs. prospective) are supported by distinct cortical EEG rhythm changes.
EEG findings support the involvement of supplementary motor, premotor, and prefrontal areas in motor planning and preparation.
Theta ERS in the left supplementary motor area significantly correlated with improved motor performance, indicated by reduced interception time.