Control of Posture and Locomotion

I: Motor Units and Muscle Spindles.- Demand and Accomplishment in Voluntary Movement.- Motoneurone Properties and Motor Control.- Functional Specialization in the Motor Unit Population of Cat Medial Gastrocnemius Muscle.- Somatotopic Connectivity or Species Connectivity?.- Physiological Estimates of the Numbers and Sizes of Motor Units in Man.- Contractile and Electrical Properties of Normal and Modified Human Motor Units.- Crustacean Motor Units.- Skeletomotor and Fusimotor Organization in Amphibians.- Evidence for Common Innervation of Bag and Chain Muscle Fibres in Cat Spindles.- Systems Approach to the Study of Muscle Spindles.- Non-Linear Behaviour of Spindle Receptors.- Discussion Summary.- Discussion Summary.- Discussion Papers.- A Third Mode of Repetitive Firing: Self-Regenerative Firing Due to Large Delayed Depolarizations.- Fatigability of Medial Gastrocnemius Motor Units in the Cat.- Motor Fields of Precentral Cells Elicited by Operant Reinforcement of Unit Activity.- Neck Muscle and Extraocular Receptors and Their Relationship to the Tectospinal Tract.- II: Control of Posture.- Postural Adaptation. The Nature of Adaptive Mechanisms in the Human Motor System.- The Significance of Intramuscular Receptors in Load Compensation During Voluntary Contractions in Man.- A Critique of the Hypothesis that the Spindle Secondary Endings Contribute Excitation to the Stretch Reflex.- The Stretch Reflex Response to Movement of the Human Elbow Joint.- The Continuity of Movements.- Postural Control: A Quantitative Study of Nervous System Functions in the Dog.- Vestibular and Reflex Control of Normal Standing.- A Cerebello-Thalamo-Cortical Pathway Controlling Fusimotor Activity.- The Supplementary Motor Area - A Control System for Posture ?.- Loading Reflexes During Two Types of Voluntary Muscle Contractions.- Control of Postural Reactions in Man: The Initiation of Gait.- Discussion Summary.- Discussion Summary.- Discussion Papers.- A Consideration of Stretch and Vibration Data in Relation to the Tonic Stretch Reflex.- Reflex and Non-Reflex Stiffness of Soleus Muscle in the Cat.- Effects of Secondary Muscle Spindle Afferent Discharge on Extensor Motoneurones in the Decerebrate Cat.- The Bases of Tremor During a Maintained Posture.- Compensation of Postural Control by Squirrel Monkeys Following Dorsal Column Lesions.- Proposal for Mode of Action of Anticholinergic Drugs Used in Parkinson's Disease.- III: Control of Locomotion.- Control of Motor Output.- Neuronal Organization and Ontogeny in the Lobster Swimmeret System.- Bursting Mechanisms in Molluskan Locomotion.- Crustacean Walking.- Nervous Control of Walking in the Cockroach.- Locomotion in the Spinal Cat.- Time Constraints for Inter-Limb Co-ordination in the Cat During Unrestrained Locomotion.- The Function of Long Propriospinal Pathways in the Co-ordination of Quadrupedal Stepping in the Cat.- Eighth Nerve Contributions to the Synthesis of Locomotor Control.- EMG of Locomotion in Gorilla and Man.- Discussion Summary.- Discussion Summary.- Discussion Papers.- The Relationship of Interlimb Phase to Oscillator Activity Gradients in Crayfish.- Gastrocnemius Muscle Activity in Human Locomotion.- Contributors.

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