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Sensorimotor transformation in a spinal motor system.
- Source :
-
Experimental brain research [Exp Brain Res] 1994; Vol. 100 (1), pp. 170-4. - Publication Year :
- 1994
-
Abstract
- To use sensory information from the skin to guide motor behaviour the central nervous system must transform sensory coordinates into movement coordinates. As yet, the basic principles of this crucial neural computation are unclear. One motor system suitable as a model for the study of such transformations is the spinal withdrawal reflex system. The spatial organization of the cutaneous input to these reflexes has been characterized, and we now introduce a novel method of motion analysis permitting a quantitative analysis of the spatial input-output relationship in this motor system. For each muscle studied, a "mirror-image" relationship was found between the spatial distribution of reflex gain for cutaneous input and the pattern of cutaneous unloading ensuing on contraction. Thus, there is an "imprint" of the movement pattern on this motor system permitting effective sensorimotor transformation. This imprint may indicate the presence of a learning process which utilizes the sensory feedback ensuing on muscle contraction.
- Subjects :
- Animals
Brain Mapping
Foot innervation
Foot physiology
Movement physiology
Muscle, Skeletal innervation
Muscle, Skeletal physiology
Nociceptors physiology
Rats
Rats, Wistar
Reflex physiology
Skin innervation
Skin Physiological Phenomena
Spinal Cord cytology
Motor Neurons physiology
Neurons, Afferent physiology
Spinal Cord physiology
Subjects
Details
- Language :
- English
- ISSN :
- 0014-4819
- Volume :
- 100
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Experimental brain research
- Publication Type :
- Academic Journal
- Accession number :
- 7813646
- Full Text :
- https://doi.org/10.1007/BF00227291