Abulia; Akinesis; Hypokinesis; Motor impersistence (These terms are not fully synonymous with action-intentional disorders, but comprise important elements of the syndrome and are often used when describing specific these elements.)
In the absence of weakness, patients can have a disability with initiating (akinesia, hypokinesia, abulia) or sustaining actions (impersistence), inhibiting irrelevant actions (defective response inhibition), and stopping an action when the task has been completed (motor perseveration).
The motor system allows humans to interact with their environment and alter themselves as well as others. The human corticospinal motor system together with the motor units and muscles can mediate an almost infinite number of movements, and thus the human motor system needs to be guided by at least two major types of programs: praxic and intentional. The praxic programs provide the corticospinal system with the knowledge of howto make...
References and Readings
- Heilman, K. M., Valenstein, E., Rothi, L. J. G., & Watson, R. T. (2004). Intentional motor disorders and apraxia. In W. G. Bradley, R. B. Daroff, G. M. Fenichel, & J. Jankovic (Eds.), Neurology in clinical practice: Principles of diagnosis and management (pp. 117–130). Phila Penn: Butterworth Heineman.Google Scholar
- Heilman, K. M., Watson, R. T., & Valenstein, E. (2003). Neglect and related disorders. In K. M. Heilman & E. Valenstein (Eds.), Clinical neuropsychology (4th ed., pp. 296–346). New York: Oxford University Press.Google Scholar