Motor-intentional disorders in right hemisphere stroke.
OBJECTIVE
Damage to premotor and prefrontal regions results in motor-intentional disorders (MIDs) that disrupt initiation, maintenance, and termination of volitional movements. MIDs more frequently occur in right hemisphere rather than in left hemisphere injury. The aim of this study was to evaluate the prevalence of MIDs in patients with right hemisphere stroke and the factors that have influence on MIDs.


METHODS
Subjects consisted of 25 consecutive patients with right hemisphere stroke and 12 normal controls. They underwent a series of experiments using force dynamometer along with bedside examination.


RESULTS
It was identified that the force control test screened for MIDs with a higher sensitivity than bedside examinations: motor akinesia (38% vs. 11%), motor impersistence (50% vs. 10%), and motor perseveration (47% vs. 25%). The patients were significantly inferior to the controls in terms of force control capabilities in the 4 force control phases (1.6 to 16.3 times). The location and area of lesion and space of force production were not related to the severity of MIDs whereas the presence of neglect was related to the severity of MIDs.


CONCLUSIONS
Our results suggest force dynamometer is a sensitive method to detect MIDs and the presence of neglect may influence the frequency of MIDs.
Seo
Sang Won
SW
Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
Jung
Kihyo
K
You
Heecheon
H
Lee
Byung Hwa
BH
Kim
Gyeong-Moon
GM
Chung
Chin-Sang
CS
Lee
Kwang Ho
KH
Na
Duk L
DL
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001921:Brain / Q000473:pathology / Q000503:physiopathology; D001931:Brain Mapping; D005260:Female; D007839:Functional Laterality; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009048:Motor Skills; D009068:Movement; D009483:Neuropsychological Tests; D010468:Perceptual Disorders / Q000209:etiology / Q000473:pathology / Q000503:physiopathology; D011596:Psychomotor Disorders / Q000209:etiology / Q000473:pathology / Q000503:physiopathology*; D011597:Psychomotor Performance; D020521:Stroke / Q000150:complications* / Q000473:pathology / Q000503:physiopathology