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Executive Function Deficits in Patients after Cerebellar Neurosurgery

Published online by Cambridge University Press:  02 December 2015

Monika Mak ,
Ernest Tyburski ,
Łukasz Madany ,
Andrzej Sokołowski  and
Agnieszka Samochowiec
Monika Mak
Affiliation:
Independent Clinical Psychology Unit, Department of Psychiatry, Pomeranian Medical University, Szczecin, Poland
Ernest Tyburski
Affiliation:
Department of Clinical Psychology, Institute of Psychology, University of Szczecin, Szczecin, Poland
Łukasz Madany
Affiliation:
Neurosurgery Department, Independent Public Specialist Health Care Centre “Zdroje”, Szczecin, Poland
Andrzej Sokołowski
Affiliation:
Faculty of Psychology, University of Warsaw, Warsaw, Poland
Agnieszka Samochowiec*
Affiliation:
Department of Clinical Psychology, Institute of Psychology, University of Szczecin, Szczecin, Poland
*
Correspondence and reprint requests to: Agnieszka Samochowiec, 69 Krakowska St, 71-017 Szczecin, Poland. E-mail: samoaga@tlen.pl
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Abstract

The cerebellum has long been perceived as a structure responsible for the human motor function. According to the contemporary approach, however, it plays a significant role in complex behavior regulatory processes. The aim of this study was to describe executive functions in patients after cerebellar surgery. The study involved 30 patients with cerebellar pathology. The control group comprised 30 neurologically and mentally healthy individuals, matched for sex, age, and number of years of education. Executive functions were measured by the Wisconsin Card Sorting Test (WCST), Stroop Color Word Test (SCWT), Trail Making Test (TMT), and working memory by the Digit Span. Compared to healthy controls, patients made more Errors and Perseverative errors in the WCST, gave more Perseverative responses, and had a lower Number of categories completed. The patients exhibited higher response times in all three parts of the SCWT and TMT A and B. No significant differences between the two groups were reported in their performance of the SCWT and TMT with regard to the measures of absolute or relative interference. The patients had lower score on the backward Digit Span. Patients with cerebellar pathology may exhibit some impairment within problem solving and working memory. Their worse performance on the SCWT and TMT could, in turn, stem from their poor motor–somatosensory control, and not necessarily executive deficits. Our results thus support the hypothesis of the cerebellum’s mediating role in the regulation of the activity of the superordinate cognitive control network in the brain. (JINS, 2016, 22, 47–57)

Keywords

CerebellumExecutive functionConceptual thinkingWorking memoryMental flexibilityCognitive inhibitionPlanning
Type
Research Articles
Information
Journal of the International Neuropsychological Society , Volume 22 , Issue 1 , January 2016 , pp. 47 - 57
Copyright
Copyright © The International Neuropsychological Society 2015 

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