Temporal and spatial coding in the rat vibrissal system.

Publisher Summary This chapter discusses the temporal and spatial coding in the rat vibrissal system. Spatial encoding of the world is accomplished by arrays of receptors, which are spatially organized across the sensory organs. Each receptor is sensitive to a specific and limited range within the sensation spectrum. Temporal encoding is attained by the temporal pattern of receptor firing, which is not limited to the dynamic aspects of the stimulus, and can also be used for encoding stationary aspects. Primates explore the texture of objects by moving their fingers across it, and rodents scan their environment by moving their whiskers. Tactile acquisition by the whiskers is a motor sensory active process. Whiskers are moved by the motor system to acquire information, which is then analyzed by the sensory system. Changes in pressure, caused by the presence of an object, or by the ridges and grooves across its surface, are detected by the mechanoreceptors. The rat vibrissal system provides a clear example of dissociated coding schemes.

[1]  M A Nicolelis,et al.  Nonlinear processing of tactile information in the thalamocortical loop. , 1997, Journal of neurophysiology.

[2]  E Ahissar,et al.  Size gradients of barreloids in the rat thalamus , 2001, The Journal of comparative neurology.

[3]  M M Merzenich,et al.  Temporal information transformed into a spatial code by a neural network with realistic properties , 1995, Science.

[4]  F. Ebner,et al.  Barrels and septa: Separate circuits in rat barrel field cortex , 1999, The Journal of comparative neurology.

[5]  D. Barth,et al.  Spatiotemporal organization of fast (>200 Hz) electrical oscillations in rat Vibrissa/Barrel cortex. , 1999, Journal of neurophysiology.

[6]  Catherine E. Carr,et al.  Processing of Temporal Information in the Brain , 1993 .

[7]  M. Deschenes,et al.  Corticothalamic Projections from the Cortical Barrel Field to the Somatosensory Thalamus in Rats: A Single‐fibre Study Using Biocytin as an Anterograde Tracer , 1995, The European journal of neuroscience.

[8]  Ehud Ahissar,et al.  Temporal-Code to Rate-Code Conversion by Neuronal Phase-Locked Loops , 1998, Neural Computation.

[9]  R. Eckhorn,et al.  High frequency (60-90 Hz) oscillations in primary visual cortex of awake monkey. , 1993, Neuroreport.

[10]  D. Simons,et al.  Biometric analyses of vibrissal tactile discrimination in the rat , 1990, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[11]  E Ahissar,et al.  Temporal frequency of whisker movement. II. Laminar organization of cortical representations. , 2001, Journal of neurophysiology.

[12]  N. Wittenburg,et al.  Transformation from temporal to rate coding in a somatosensory thalamocortical pathway , .

[13]  M. Diamond.  Somatosensory Thalamus of the Rat , 1995 .

[14]  M. Nicolelis,et al.  Sensorimotor encoding by synchronous neural ensemble activity at multiple levels of the somatosensory system. , 1995, Science.

[15]  E Ahissar,et al.  Decoding temporally encoded sensory input by cortical oscillations and thalamic phase comparators. , 1997, Proceedings of the National Academy of Sciences of the United States of America.

[16]  E Ahissar,et al.  Oscillatory activity of single units in a somatosensory cortex of an awake monkey and their possible role in texture analysis. , 1990, Proceedings of the National Academy of Sciences of the United States of America.

[17]  R. Guillery,et al.  Functional organization of thalamocortical relays. , 1996, Journal of neurophysiology.

[18]  J. G. Thomas,et al.  Studies on Human Ocular Tremor , 1973 .

[19]  P. Waite,et al.  Responses in the rat thalamus to whisker movements produced by motor nerve stimulation , 1974, The Journal of physiology.

[20]  G. P. Moore,et al.  Pacemaker Neurons: Effects of Regularly Spaced Synaptic Input , 1964, Science.

[21]  F. Ebner,et al.  The role of GABA-mediated inhibition in the rat ventral posterior medial thalamus. I. Assessment of receptive field changes following thalamic reticular nucleus lesions. , 1994, Journal of neurophysiology.

[22]  M. Brecht,et al.  Functional architecture of the mystacial vibrissae , 1997, Behavioural Brain Research.

[23]  W. Welker,et al.  Coding of somatic sensory input by vibrissae neurons in the rat's trigeminal ganglion. , 1969, Brain research.

[24]  M. Shipley,et al.  Response characteristics of single units in the rat's trigeminal nuclei to vibrissa displacements. , 1974, Journal of neurophysiology.

[25]  F. Ebner,et al.  Somatic sensory responses in the rostral sector of the posterior group (POm) and in the ventral posterior medial nucleus (VPM) of the rat thalamus: Dependence on the barrel field cortex , 1992, The Journal of comparative neurology.

[26]  M F Jacquin,et al.  Differential Foci and Synaptic Organization of the Principal and Spinal Trigeminal Projections to the Thalamus in the Rat , 1994, The European journal of neuroscience.

[27]  F. Ebner,et al.  Modulation of receptive field properties of thalamic somatosensory neurons by the depth of anesthesia. , 1999, Journal of neurophysiology.

[28]  Thomas A. Woolsey,et al.  Barrels, Vibrissae, and Topographic Representations , 1988 .

[29]  R. Lin,et al.  Thalamic afferents of the rat barrel cortex: a light- and electron-microscopic study using Phaseolus vulgaris leucoagglutinin as an anterograde tracer. , 1993, Somatosensory & motor research.

[30]  Idan Segev,et al.  Methods in neuronal modeling: From synapses to networks , 1989 .

[31]  Ehud Ahissar,et al.  Transformation from temporal to rate coding in a somatosensory thalamocortical pathway , 2000, Nature.

[32]  T. Salt,et al.  Gamma-aminobutyric acid and afferent inhibition in the cat and rat ventrobasal thalamus , 1989, Neuroscience.

[33]  R. Johansson,et al.  Responses of mechanoreceptive afferent units in the glabrous skin of the human hand to sinusoidal skin displacements , 1982, Brain Research.

[34]  Floyd M. Gardner,et al.  Phaselock techniques , 1984, IEEE Transactions on Systems, Man, and Cybernetics.

[35]  W. Welker.  Analysis of Sniffing of the Albino Rat 1) , 1964 .

[36]  G. P. Moore,et al.  PACEMAKER NEURONS: EFFECTS OF REGULARLY SPACED SYNAPTIC INPUT. , 1964, Science.

[37]  E. Ahissar,et al.  Seeing through miniature eye movements: A hypothesis , 1997, Neuroscience Letters.

[38]  Erika E. Fanselow,et al.  Behavioral Modulation of Tactile Responses in the Rat Somatosensory System , 1999, The Journal of Neuroscience.

[39]  P. E. Hallett,et al.  Power spectra for ocular drift and tremor , 1985, Vision Research.

[40]  Miriam Zacksenhouse,et al.  Sensitivity of basic oscillatory mechanisms for pattern generation and detection , 2001, Biological Cybernetics.

[41]  C. Gray,et al.  Chattering Cells: Superficial Pyramidal Neurons Contributing to the Generation of Synchronous Oscillations in the Visual Cortex , 1996, Science.

[42]  E. Ahissar,et al.  Spatial organization of facial vibrissae and cortical barrels in the guinea pig and golden hamster , 1997, The Journal of comparative neurology.

[43]  V. Mountcastle,et al.  The sense of flutter-vibration: comparison of the human capacity with response patterns of mechanoreceptive afferents from the monkey hand. , 1968, Journal of neurophysiology.

[44]  D Kleinfeld,et al.  Anatomical loops and their electrical dynamics in relation to whisking by rat. , 1999, Somatosensory & motor research.

[45]  D. Simons,et al.  Spatial organization of thalamocortical and corticothalamic projection systems in the rat SmI barrel cortex , 1989, The Journal of comparative neurology.

[46]  Karl F. Jensen,et al.  Evidence for two complementary patterns of thalamic input to the rat somatosensory cortex , 1988, Brain Research.

[47]  L A JEFFRESS,et al.  A place theory of sound localization. , 1948, Journal of comparative and physiological psychology.

[48]  G. H. Bishop.  The relation between nerve fiber size and sensory modality: phylogenetic implications of the afferent innervation of cortex. , 1959, The Journal of nervous and mental disease.

[49]  E Ahissar,et al.  Temporal frequency of whisker movement. I. Representations in brain stem and thalamus. , 2001, Journal of neurophysiology.