Synergy 1st Edition by Mark L. Latash – Ebook PDF Instant Download/Delivery: 0195333160, 9780195333169
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ISBN 10: 0195333160
ISBN 13: 9780195333169
Author: Mark L. Latash
Synergy dicusses a general problem in biology: the lack of an adequate language for formulating biologically specific problems. It describes the recent progress in the control and coordination of human movement.
The book begins with a brief history of movement studies and reviews the current central controversies in the area of control of movements with an emphasis on the equilibrium-point hypothesis. An operational definition of synergy is introduced and a method of analysis of synergies is described based on the uncontrolled manifold hypothesis. Further this method is used to characterize synergies in a variety of tasks including such common motor tasks as standing, pointing, reaching, standing-up, and manipulation of hand-held objects. Applications of this method to movements by persons with neurological disorders, persons with atypical development and healthy elderly persons are illustrated, as well as changes in motor synergies with practice. Possible neurophysiological mechanisms of synergies are also discussed with the focus on such conspicuous structures as the spinal cord, the cerebellum, the basal ganglia, and the cortex of the large hemispheres. A variety of models are discussed based on different computational and neurophysiological principles. Possible applications of the introduced definition of synergies to other areas such as perception and language are discussed.
Table of contents:
Part I: Building a Definition for Synergy
1.1:Synergies and Non-synergies: A Few Examples
1.2:Palama’s Concept of Synergy
1.3:Inanimate “synergies”: The Table and the Rusty Bucket
1.4:Examples of Biological Synergies
1.5:The Definition: Three Components of a Synergy
Part II: A Brief History of Movement Studies
2.1:Ancient Greece and Rome
2.2:
2.3:The Century of Frogs, Photography, and Amazing Guesses
2.4:The Twentieth Century: Wars of Ideas
2.5:Nikolai Alexandrovich Bernstein and Movement Science in the Soviet Union
2.6:History of Synergies and the Problem of Motor Redundancy
2.7:Problems with Studying Biological Movement
Part III: Motor Control and Coordination
3.1:Israel Gelfand and Michael Tsetlin
3.2:Structural Units and the Principle of Minimal Interaction
3.3:Motor control: Programs and Internal Models
Digress on #1: The Muscle: Slow and Visco-elastic
Digression #2: Neural pathways: Long and Slow
Digression #3: Sensors: Confusing and Unreliable
Digression #4: Adaptation to Force Fields and after-effects
Digression #5: Brain Imaging Techniques: What do they Image?
3.4:The Equilibrium-point hypothesis
3.4.1:Experimental Foundations of the Equilibrium-point hypothesis
Digression #6: Reflexes and non-reflexes
3.4.3:Three basic trajectories within the equilibrium- point hypothesis
3.4.4:Equilibrium-point control of multi-muscle systems
3.4.5.:The mass-spring analogy and other misconceptions
Part IV: Motor Variability – a Window into Synergies
4.1:The Uncontrolled Manifold Hypothesis
4.2:Modes as Elemental Variables
4.2.1.:Force Modes
Digression #7: Digit Interaction and its Indices
4.2.2.:Muscle Modes
Digression #8: Electromyography
4.2.3.:Experimental Identification of the Jacobian
4.3:Stability, Variability, and within-a-trial Analysis of Synergies
4.4:Other Computational Tools to Study Synergies
4.4.1.:Principal Component Analysis and Uncontrolled Manifold
4.4.2.:Analysis of Surrogate Data Sets
4.5:Timing Synergies: Do they exist?
Part V: Zoo of Motor Synergies
5.1:Kinematic synergies
5.1.1.:Postural Synergies in Standing
5.1.2.:Sit-to-Stand Task
5.1.3.:Reaching
Digression #9: Optimization
5.1.4.:Reaching in a Changing Force Field
5.1.5.:Multi-Joint Pointing
5.1.6.:Quick-Draw Pistol Shooting
5.2:Kinetic synergies
5.3:Multi-Digit Synergies
5.3.1.:Force and Moment Stabilization during Multi-Finger Pressing
5.3.2.:The Role of Timing Errors
5.3.3.:Emergence and Disappearance of Synergies
5.3.4.:Anticipatory Synergy Adjustments and Purposeful Destabilization of Performance
5.4:Prehensile Synergies
5.4.1.:Hierarchical Control of Prehension
5.4.2.:Principle of Superposition
5.4.3.:Adjustments of Synergies: Chain Effects
5.4.4.:Hierarchies of Synergies
5.5:Multi-muscle Synergies
5.5.1.:Anticipatory Postural Adustments
5.5.2.:Making a Step
5.5.3.:Multi-Muscle Syndergies in Hand Force Production
Part VI: Atypical, Suboptimal, and Changing Synergies
6.1:Is there a “normal synergy”?
6.2:Principle of Indeterminicity in Movement Studies
6.3:Plasticity in the Central Nervous System
Digression #10: Transcranial Magnetic Stimulation
6.4:Changes in Synergies with Age
6.4.1.:Effects of Age on Muscles and Neurons
6.4.2.:Effects of Age on Motor Coordination
6.5:Synergies in Persons with Down syndrome
6.5.1.:Movements in Persons with Down syndrome
6.5.2.:Multi-finger Coordination in Down syndrome
6.5.3.:Effects of Practice on Movement in Down syndrome
6.5.4.:Relation of Unusual Synergies to Changes in the Cerebellum
6.6:Synergies after Stroke
6.7:Learning Movement Synergies
6.7.1.:Traditional Views on Motor Learning
6.7.2.:What can happen with a Synergy with Practice?
6.7.3.:Practicing Kinematic Tasks
6.7.4.:Practicing Kinetic Tasks
6.7.5.:Plastic Changes with Learning a Synergy
Part VII: Neurophysiological Mechanisms of Synergies
7.1:Neurophysiological Structures and the Motor Function
Digression #11: What is localized in Neural Structures?
7.2:Synergies in the Spinal Cord
7.3:Synergies and the Cerebellum
7.4:Synergies and the Basal Ganglia
7.5:Synergies and the Cortex of the Large Hemispheres
7.5.1.:TMS and the equilibrium-point hypothesis
7.5.2.:Studies of Neuronal Populations
Part VIII: Models and Beyond Motor Synergies
8.1:Synergies and the Control Theory
8.1.1:Control: Basic Notions
8.1.2.:Open-loop and Closed-loop (feed-forward and feedback) Control
8.1.3.:A Simple Scheme of Synergic Control of a Multi-joint Movement
8.1.4.:Optimal Control and Synergies
8.2:Synergies and Neural Networks
8.3:Synergies Without Feedback
8.3.1.:Do Synergies Improve Accuracy?
8.3.2.:A Feed-forward Model with Separate Specification of Good and Bad Ariability
8.4:Synergies and the Equilibrium-point Hypothesis
8.5:Sensory Synergies
8.5.1.:Sensory synergies in Neurological Disorders
Digression #12: Sensory and Motor Effects of Muscle Vibration
8.5.2.:Sensory-motor Interactions
8.5.3.:Sensory Synergies in Vertical Posture
8.5.4.:Multi-sensory Mechanisms
8.6:Language as a Synergy
8.7:Concluding Comments: What next?
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