start-ver=1.4
cd-journal=joma
no-vol=20
cd-vols=
no-issue=4
article-no=
start-page=415
end-page=420
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2014
dt-pub=201404
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Cognitive functions in Parkinson's disease: Relation to disease severity and hallucination
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Objective: We wished to relate severity of Parkinson's disease (PD) with cognitive function in relation to cerebral blood flow (CBF). 

Methods: Eighty-one consecutive PD patients were enrolled in this study. We used Mini-Mental State Examination (MMSE) and Wechsler Adult Intelligence Scale-Third edition (WAIS-III) to evaluate cognitive functions, and three-dimensional stereotactic ROI template (3DSRT) and Statistical Parametric Mapping (SPM) 8 to evaluate single photon emission CT (SPECT) recordings of regional CBF. 

Results: The mean MMSE score of PD patients was 27.4 +/- 2.4. The scores of most patients were higher than 23/30. On the other hand, the mean Full-scale IQ of PD patients was 88.4 +/- 17.3 in WAIS-III, which was lower than that of normal controls. In particular, visuospatial function score of most patients was lower. There was significant correlation between cognitive scores and Hoehn & Yahr stage and hallucinatory episodes. PD Patients with stage III and IV showed significant deterioration in cognitive functions compared to stage II patients. Analysis of CBF revealed relative reductions in perfusion in the cerebral cortex relative to that in normal control. SPM 8 showed that cognitive functions in PD patients were positively correlated with rCBF in the thalamus and cingulate gyrus. 

Conclusions: This is the study to demonstrate the cognitive impairments in PD patients using WAIS-III. Visuospatial dysfunction might be caused by decrease in rCBF in the parietal and occipital lobes and dorsolateral prefrontal cortex. The severity of cognitive impairments in PD patients was correlated with disease severity and hallucinatory episodes.
en-copyright=
kn-copyright=

en-aut-name=WakamoriTakaaki
en-aut-sei=Wakamori
en-aut-mei=Takaaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=AgariTakashi
en-aut-sei=Agari
en-aut-mei=Takashi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=YasuharaTakao
en-aut-sei=Yasuhara
en-aut-mei=Takao
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=KamedaMasahiro
en-aut-sei=Kameda
en-aut-mei=Masahiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=KondoAkihiko
en-aut-sei=Kondo
en-aut-mei=Akihiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=ShinkoAiko
en-aut-sei=Shinko
en-aut-mei=Aiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

en-aut-name=SasadaSusumu
en-aut-sei=Sasada
en-aut-mei=Susumu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=

en-aut-name=SasakiTatsuya
en-aut-sei=Sasaki
en-aut-mei=Tatsuya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=

en-aut-name=FurutaTomohisa
en-aut-sei=Furuta
en-aut-mei=Tomohisa
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=

en-aut-name=DateIsao
en-aut-sei=Date
en-aut-mei=Isao
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg

affil-num=2
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg

affil-num=3
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg

affil-num=4
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg

affil-num=5
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg

affil-num=6
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg

affil-num=7
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg

affil-num=8
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg

affil-num=9
en-affil=
kn-affil=Kibi Int Univ, Dept Psychol

affil-num=10
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg
en-keyword=Parkinson's disease
kn-keyword=Parkinson's disease
en-keyword=Cognitive functions
kn-keyword=Cognitive functions
en-keyword=Disease severity
kn-keyword=Disease severity
en-keyword=Hallucinations
kn-keyword=Hallucinations
en-keyword=SPECT
kn-keyword=SPECT
END