Abstract
We present evidence for the generation of stable convergent force field patterns and muscle synergies in the spinal cord of the frog. These synergies may form the bases of postural and trajectory adjustments. We present recent analyses which show that (1) similarly structured force fields underlie natural behaviors (2) the active fields underlying both microstimulation and natural behavioral force fields are structurally invariant but may be modulated in overall force amplitude and stiffness (3) these fields are drawn from a limited set of such fields (4) these invariant fields can be used to predict the termination position of limb endpoint trajectories in the unrestrained limb (5) in those instances tested multiple stimulations resulted in fields proportional to the vectorial summation of the fields resulting from single stimulations. This recent body of work suggests that we may view the spinal cord as possessing a small number of movement primitives: circuits that may specify invariant force fields which may be combined in a more or less flexible manner to produce adjustable behaviors.
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Abstract
Alstermark B and Sasaki S (1986) Integration in descending motor pathways controlling the forelimb in the cat 15. Comparison of the projection from excitatory C3–C4 propriospinal neurones to different species of forelimb motoneurones. Exp. Brain Res. 63: 543–566.
Berkinblitt MB, Feldman AG, and Fukson OI (1989) Wiping reflex in the frog: Movement patterns,receptive fields and blends. pp. 615–630 inVisuomotor Coordination: amphibians, comparisons. models and robots.(J.-P. Ewert and M.A. Arbib Eds). Plenum Press.
Bizzi E, Mussa-Ivaldi FA, and Giszter SF (1991) Computations underlying the execution of movement: a novel biological perspective. Science 253:287–291.
Bizzi E, Accomero N, Chapple W and Hogan N (1984) Posture control and trajectory formation during arm movement. J. Neurosci. 4:2738–2744.
Cohen AH (1987) The structure and function of the intersegmental coordinating system of the lamprey central pattern generation for locomotion. J. Comp. Physiol. 160: 181–193.
Feldman AG (1979) Central and reflex mechanisms of motor control. Nauka, Moscow
Fukson OI, Berkinblitt MB and Feldman AG (1980) The spinal frog takes into account the scheme of its body during the wiping reflex. Science 209: 1261–1263.
Georgopoulos AP, Kettner RE and Schwartz AB (1988a) Primate motor cortex and free arm movements to visual targets in three-dimensional space.I. Relations between single cell discharge and direction of movement. J. Neurosci. 8: 2913–2927.
Georgopoulos AP, Kettner RE and Schwartz AB (1988b) Primate motor cortex and free arm movements to visual targets in three-dimensional space.II. Coding of the direction of movement by a neuronal population. J. Neurosci. 8: 2928–2937.
Giszter SF, McIntyre J and Bizzi E (1989) Kinematic strategies and sensorimotor transformations in the wiping movements of frogs. J. Neurophysiol. 62: 750–767.
Giszter SF, Mussa-Ivaldi FA, and Bizzi E (199la) Equilibrium point mechanisms in the spinal frog. In: M. Arbib and J.P. Ewert (eds.)Visual Structures and integrated functionsPlenum Press, New York
Giszter SF, Mussa-Ivaldi FA, and Bizzi E (1991b) The organization of motor space in the frog spinal cord. Exp. Brain Res (In press).
Giszter SF, Bizzi E, and Mussa-Ivaldi FA (1991) Motor organization in the frog spinal cord. In: F.H. Eeckman and C.D. Deno (eds.)Analysis and Modelling of neural systems.Kluwer Press, Moffett Field, CA, 1991
Grillner S and Wallen P (1985) Central pattern generators for locomotion, with special reference to vertebrates. Annual Rev. Neurosci. 8: 233–261.
Grobstein, P (1990) Strategies for analyzing complex organization in the nervous system. II. A case study: Directed movement and spatial representation in the frog. pp. 242–255 inComputational Neuroscience(E. L. Schwartz Ed.) M.I.T. Press, Cambridge, MA.
Jhaveri S and Frank E (1983) Central projections of the brachial nerve in bullfrogs: muscle and cutaneous afferents project to different regions of the spinal cord. J. Comp. Neurol. 221: 304–312.
Lichtman JW, Wilkinson RS and Rich MM (1985) Multiple innervation of tonic endplates revealed by activity-dependent uptake of florescent probes. Nature 314: 357–359.
Masino T and Grobstein P (1989a) The organization of descending tectofugal pathways underlying orienting in the frogRana pipiers.I. Lateralization, pracellation, and an intermediate spatial representation. Exp. Brain Res. 75:227–244.
Masino T and Knudsen EI (1990) Horizontal and vertical components of head movement are controlled by distinct neural circuits in the barn owl. Nature 345: 434–437.
McClellan A and Sigvardt K (1988) Features of entrainment of spinal pattern generators for locomotor activity in the lamprey spinal cord. J. Neurosci. 8: 133–145.
Mortin LI, Keifer J and Stein PSG (1985) Three forms of the scratch reflex in the spinal turtle: Movement Analyses. J. Neurophysiol. 53: 1501–1516.
Mussa-Ivaldi FA, Giszter SF and Bizzi E (1991) Motor-space coding in the central nervous system. In: Cold Spring Harbor symposium on quantitative biology, vol. LV Cold Spring Harbor Laboratory Press 53.
D.J. Ostry, A.G. Feldman, J.R. Flanagan, J. Neurophysiol. 65, 547 (1991).
Preparata FP and Shamos MI (1988)Computational GeometryAddison Wesley, N.Y.
Robertson GA, Mortin LI, Keifer J and Stern PSG (1985) Three forms of the scratch reflex in the spinal turtle: central generation of motor patterns. J. Neurophysiol. 53: 1517–1534.
Schotland JL, Lee WA and Rymer WZ (1989) Wiping and flexion withdrawal reflexes display different EMG patterns prior to movement onset in the spinalized frog. Exp. Brain Res. 78: 649–653.
Simpson JI (1976) Functional synaptology of the spinal cord pp. 728–749 inFrog NeurolliologyLLinas R and Precht W, Eds, Springer-Verlag, Berlin.
Stein PSG (1983) The vertebrate scratch reflex. Symp. Soc. Exp. Biol. 37: 398–403.
Stein PSG, Mortin LI and Robertson GA (1986) The forms of a task and their blends. In: S. Grinner, P. Stein, DG Stuart, H Forssberg and RM Herman (Eds)Neurobiology of Vertebrate LocomotionMacmillian, London,201–216.
Windhorst UR (1991) Group report: What are the units of motor behavior and how are they controlled? with Burke RE, Dieringer N, Evinger C, FeldmanAG, Hasan Z, Hultbom H, Illert M, Lundberg AP, Macpherson JM, Massion J, Nichols TR, Schwartz M, Vilis T. pp101–120 inMotor Control: Concepts and Issues.Humphrey DR and Freund H-J Eds. Wiley, New York.
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Giszter, S., Mussa-Ivaldi, F.A., Bizzi, E. (1993). Movement Primitives in the Frog Spinal Cord. In: Eeckman, F.H. (eds) Neural Systems: Analysis and Modeling. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3560-7_30
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DOI: https://doi.org/10.1007/978-1-4615-3560-7_30
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