Temporal structure of the apparent motion perception: a magnetoencephalographic study

Humans perceive motion when numerous small dots pattern is followed by one of the same pattern but with all the dots shifted a little in one direction. When the amount of shift exceeds a level humans no more perceive motion even though physical visual information does not change. Using this stimulus, we addressed to elucidate the temporal structure of the neural activity related to this apparent motion perception. The magnetic responses to the random-dot patterns with various amounts of shift were measured while the subjects were performing a direction discrimination task. A significant magnetic response amplitude change occurred with three distinct peaks when the response inducing apparent motion was compared with those inducing no motion without change in the response latencies. The major difference occurred at about 110, 140, 210 ms after the stimulus onset. The response origin was always within the occipitotemporal area. The results indicate that the neural activity for the perception of apparent motion can be measured by MEG that occur at least 110 ms after the stimulus onset possibly in the human MT+. Three distinct peaks in the response difference may represent the sequential multiple neural process proposed theoretically though further study is necessary to prove.

[1]  R J Ilmoniemi,et al.  Spatiotemporal activity of a cortical network for processing visual motion revealed by MEG and fMRI. , 1999, Journal of neurophysiology.

[2]  H Barlow,et al.  Correspondence Noise and Signal Pooling in the Detection of Coherent Visual Motion , 1997, The Journal of Neuroscience.

[3]  O. Braddick.  A short-range process in apparent motion. , 1974, Vision research.

[4]  E. Halgren,et al.  Early discrimination of coherent versus incoherent motion by multiunit and synaptic activity in human putative MT+ , 2001, Human brain mapping.

[5]  Robert Sekuler,et al.  Coherent global motion percepts from stochastic local motions , 1984, Vision Research.

[6]  R. Andersen,et al.  Functional analysis of human MT and related visual cortical areas using magnetic resonance imaging , 1995, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[7]  W. Newsome,et al.  Motion selectivity in macaque visual cortex. II. Spatiotemporal range of directional interactions in MT and V1. , 1986, Journal of neurophysiology.

[8]  Rainer Goebel,et al.  Apparent Motion: Event-Related Functional Magnetic Resonance Imaging of Perceptual Switches and States , 2002, The Journal of Neuroscience.

[9]  M. Manning,et al.  Electrical responses to short-range kinematogram displays: an occipital lobe global motion process in humans? , 1992, Vision Research.

[10]  Takeo Watanabe,et al.  High-Level Motion Processing , 1998 .

[11]  R. Ilmoniemi,et al.  Magnetoencephalography-theory, instrumentation, and applications to noninvasive studies of the working human brain , 1993 .

[12]  S Zeki,et al.  Going beyond the information given: the relation of illusory visual motion to brain activity , 1993, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[13]  B. Julesz,et al.  Displacement limits for spatial frequency filtered random-dot cinematograms in apparent motion , 1983, Vision Research.

[14]  Denis Fize,et al.  Speed of processing in the human visual system , 1996, Nature.

[15]  T. Allison,et al.  Temporal Cortex Activation in Humans Viewing Eye and Mouth Movements , 1998, The Journal of Neuroscience.

[16]  G. Orban,et al.  Many areas in the human brain respond to visual motion. , 1994, Journal of neurophysiology.

[17]  J. Andreassi,et al.  Visual evoked potentials under varied velocities of continuous and discrete apparent motion. , 1982, The International journal of neuroscience.

[18]  A. Yoshino,et al.  Human brain potentials observed using the line-motion method: the neurophysiological correlates of visual illusory motion perception , 1997, Neuroscience Letters.

[19]  V. Jousmäki,et al.  Activation trace lifetime of human cortical responses evoked by apparent visual motion , 1997, Neuroscience Letters.

[20]  R Kakigi,et al.  Human visual motion areas determined individually by magnetoencephalography and 3D magnetic resonance imaging , 2000, Human brain mapping.

[21]  W. Newsome,et al.  Motion selectivity in macaque visual cortex. III. Psychophysics and physiology of apparent motion. , 1986, Journal of neurophysiology.

[22]  J. Sarvas.  Basic mathematical and electromagnetic concepts of the biomagnetic inverse problem. , 1987, Physics in medicine and biology.

[23]  N. Mai,et al.  Selective disturbance of movement vision after bilateral brain damage. , 1983, Brain : a journal of neurology.

[24]  Norihiro Sadato,et al.  Visual detection of motion speed in humans: spatiotemporal analysis by fMRI and MEG , 2002, Human brain mapping.

[25]  Ryusuke Kakigi,et al.  Perception of apparent motion is related to the neural activity in the human extrastriate cortex as measured by magnetoencephalography , 2000, Neuroscience Letters.

[26]  H Suzuki,et al.  Human cortical area responding to stimuli in apparent motion , 1997, Neuroreport.

[27]  Shozo Tobimatsu,et al.  Parvocellular and magnocellular contributions to visual evoked potentials in humans: stimulation with chromatic and achromatic gratings and apparent motion , 1995, Journal of the Neurological Sciences.

[28]  T. Allison,et al.  Brain Activity Evoked by the Perception of Human Walking: Controlling for Meaningful Coherent Motion , 2003, The Journal of Neuroscience.

[29]  Leslie G. Ungerleider,et al.  ‘What’ and ‘where’ in the human brain , 1994, Current Opinion in Neurobiology.

[30]  E Donchin,et al.  A metric for thought: a comparison of P300 latency and reaction time. , 1981, Science.

[31]  R. Hari,et al.  Recording and interpretation of cerebral magnetic fields. , 1989, Science.

[32]  Daniel Kahneman,et al.  Stroboscope motion: Effects of duration and interval1 , 1970 .

[33]  Ryusuke Kakigi,et al.  Human cortical responses to coherent and incoherent motion as measured by magnetoencephalography , 2002, Neuroscience Research.

[34]  W. Newsome,et al.  Motion selectivity in macaque visual cortex. I. Mechanisms of direction and speed selectivity in extrastriate area MT. , 1986, Journal of neurophysiology.

[35]  Magnetoencephalography—Update and Future Hopes , 1983 .