Scaling of movement velocity: a measure of neuromotor retardation in individuals with psychopathology.
Psychophysiology
; 35(4): 431-7, 1998 Jul.
Article
en En
| MEDLINE
| ID: mdl-9643057
ABSTRACT
The study of motor slowness based on observational methods has limitations. Whether motor retardation has a psychomotor or neuromotor basis is unclear because psychiatric and motor symptoms overlap. Observational methods lack the precision necessary to distinguish cognitive from motor processes. For the present study, we used an objective measure of neuromotor dysfunction to quantify the extent to which an individual programs movement velocity in anticipation of increasing target distance. Persons with Parkinson's disease (PD) or functional psychosis were studied with a group of healthy comparison subjects. Results indicated that the slope of the linear function relating velocity to distance was abnormal in the PD group and in approximately half of the psychosis group. Analyses revealed the measure to have high specificity and sensitivity. Weak correlations between velocity scaling and psychopathology support the neuromotor basis of the measure. We conclude that this measure of velocity scaling is relatively uninfluenced by cognitive factors that may underlie psychomotor retardation.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Enfermedad de Parkinson
/
Trastornos Psicomotores
/
Desempeño Psicomotor
/
Trastornos Psicóticos
/
Tiempo de Reacción
/
Discinesia Inducida por Medicamentos
Tipo de estudio:
Diagnostic_studies
Límite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Psychophysiology
Año:
1998
Tipo del documento:
Article
País de afiliación:
Estados Unidos