Cerebral Cortical Mechanisms of Reaching Movements

Because reaching movements have a clear objective-to bring the hand to the spatial location of an object-they are well suited to study how the central nervous system plans a purposeful act from sensory input to motor output. Most models of movement planning propose a serial hierarchy of analytic ste...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1992-03, Vol.255 (5051), p.1517-1523
Main Authors: Kalaska, John F., Crammond, Donald J.
Format: Article
Language:English
Subjects:
Algorithms
Anatomy
Animals
Arm
Behavioral neuroscience
Biological and medical sciences
Brain
Brain Mapping
Central nervous system
Cerebral cortex
Cerebral Cortex - physiology
Error Patterns
Fundamental and applied biological sciences. Psychology
Hands
Kinematics
Medical research
Models, Biological
Motion
Motor ability
Motor Activity - physiology
Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration
Motor skills
Motors
Movement - physiology
Nervous system
Neurons
Neurons - physiology
Physiological aspects
Senses
Vertebrates: nervous system and sense organs
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Summary:Because reaching movements have a clear objective-to bring the hand to the spatial location of an object-they are well suited to study how the central nervous system plans a purposeful act from sensory input to motor output. Most models of movement planning propose a serial hierarchy of analytic steps. However, the central nervous system is organized into densely interconnected populations of neurons. This paradox between the apparent serial order of central nervous system function and its complex internal organization is strikingly demonstrated by recent behavioral, modeling, and neurophysiological studies of reaching movements.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1549781