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Increase of prefrontal cortex blood flow during trail making test

Published online by Cambridge University Press:  16 April 2020

M. Kubo ,
Y. Kitamura ,
K. Kinugasa  and
M. Okamoto
M. Kubo
Affiliation:
Graduate School of Health Sciences, Okayama University, Okayama, Japan
Y. Kitamura
Affiliation:
Okayama Ryogo Center, Okayama, Japan
K. Kinugasa
Affiliation:
Okayama Ryogo Center, Okayama, Japan
M. Okamoto
Affiliation:
Graduate School of Health Sciences, Okayama University, Okayama, Japan

Abstract

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Background and aims:

Trail making test (TMT) was developed as a neuropsychological test evaluating frontal lobe function. However, the contribution of frontal lobe in results of TMT is still controversial because studies in patients with brain injuries suggest the role of basal ganglia rather than frontal lobe in results of TMT.

Methods:

To examine the contribution of frontal lobe in the results of TMT, we measured blood flow in frontal cortex during performance of computer version TMT-A and TMT-B.

Sixteen healthy student volunteers (8 male, 25.9±5.3 year old; 8 female, 22.0±2.9 year old) was used in the study. Seven laser beam probes and 8 sensor probes were put on frontal lobe, and absorbance of 695 nm and 830 nm infrared beams were measured at 10Hz by optic topography (ETG 4000, Hitachi, Medical Corporation, Tokyo, Japan).

Results:

Concentration of deoxyhemoglobin was decreased while concentration of oxyhemoglobin was increased in the prefrontal cortex during the performance of TMT-A and TMT-B.

Conclusions:

The results suggest that blood flow increases in the prefrontal cortex during the performance of TMT, and possible involvement of this brain region in the performance of TMT.

Type
Poster Session 2: Biological Markers And Brain Imaging
Information
European Psychiatry , Volume 22 , Issue S1: 15th AEP Congress - Abstract book - 15th AEP Congress , March 2007 , pp. S316
Copyright
Copyright © European Psychiatric Association 2007
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