Non-dominant dorsal-prefrontal activation during chess problem solution evidenced by single photon emission...

Area of Science:

• Neuroscience
• Cognitive Psychology
• Radiological Imaging

Background:

• Expert chess players exhibit superior memory for chess positions compared to novices.
• Hypothesis: Mental processes during chess deliberation are suitable for investigation using functional neuroimaging techniques like SPECT.
• Previous neuropsychological studies suggest non-dominant hemisphere specialization for chess expertise.

Purpose of the Study:

• To investigate cerebral activation patterns in expert chess players during complex problem-solving using SPECT.
• To determine if non-dominant prefrontal and temporal lobe activity can be detected during chess deliberation.

Main Methods:

• Utilized single photon emission computerized tomography (SPECT) with 99mTc-Bicisate.
• Studied five expert male chess players engaged in solving a complex chess problem.
• Performed region of interest (ROI) analysis, comparing activity to cerebellar counts, with a test/retest variability of 1.5%.

Main Results:

• Observed significant activation (≥10%) in the non-dominant prefrontal area (right hemisphere for most right-handed players).
• Detected moderate activation (2-6%) in the non-dominant middle temporal areas.
• Results demonstrated detectable cerebral activation during chess deliberation.

Conclusions:

• SPECT imaging can detect specific brain activation during complex cognitive tasks like chess problem-solving.
• Findings support the hypothesis of non-dominant hemisphere involvement in chess expertise.
• Demonstrated activation in non-dominant prefrontal and temporal lobes aligns with theories of hemispheric specialization for chess skill.