Titlebook: Information Processing in the Somatosensory System; Ove Franzén,Jan Westman Textbook 1991Latest edition Macmillan Publishers Limited 1991

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Afferent Signals During Manipulative Tasks in Humansestigate sensory and motor functions in biological and artificial systems. For nearly a decade, we have studied this question in relation to dexterous manipulation. Our studies have focused mainly on control of coordination during grasping, lifting and manipulation of small objects using a precision

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Surface Microgeometry: Tactile Perception and Neural Encodingtch or fine texture can be readily perceived through the tactile sense. The following experiments were designed to determine the smallest surface features that humans can detect, and the peripheral neural events contributing to this detection. Another objective was to determine the importance of the

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Encoding of Shape in the Responses of Cutaneous Mechanoreceptorsse fingerpads for exploring small features, owing to the high density of cutaneous mechanoreceptors (Johansson and Vallbo, 1979; Darian-Smith and Renins, 1980) which results in high spatial resolution, as well as due to the dexterity and fine motion control achieved with multiple degrees of freedom

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Neural Population Encoding of Touch Intensityomplex multidimensional sensations. These sensations can, to a first approximation, be understood by the response characteristics of the population of mechanoreceptive afferents innervating the glabrous skin of the hand (Johansson, 1978; Johansson, 1979). In order to study the peripheral neural basi

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Peripheral Neural Basis for the Tactile Perception of Textureject and its properties, and to optimize its manipulation. One such important characteristic is surface texture (Lederman and Taylor, 1972; Meenes and Zigler, 1923; Kruger, 1970; LaMotte and Whitehouse, 1986). We have investigated the neural mechanisms of texture perception by correlating perceived

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Excitatory Amino Acid Receptor Mediated Synaptic Transmission in the Somatosensory Systemify the transmitter released at central synapses, the receptor types mediating synaptic responses can be identified with more certainty. Excitatory amino acid (EAA) receptors can be classified broadly as NMDA (N-methyl-D-aspartate) and non-NMDA receptors, on the basis of the sensitivity of responses

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Distribution of Thalamic Input to the Sensorimotor Cortex of the Macaque Monkeyplexity and sophistication. We cannot use the hand in this way unless the brain receives a continuous inflow of proprioceptive and tactile sensory information, mostly generated by the movement itself, which specifies the position of the hand in space, and the contact it makes with the object. Nor ca