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fMRI and psychological experiments in which subjects wore right-left
reversing goggles for more than 5 weeks

Movie files of the experiment on adaptation to left-right reversing goggles
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Left-right reversing goggles (left) and a subject wearing the goggles (right)

Related publications:
œ Body image as a visuomotor transformation device revealed in adaptation to reversed vision. Sekiyama K, Miyauchi S, Imaruoka T, Egusa H, Tashiro T, Nature 407: 374-377 (2000)
œ Modification of depth and distance perception caused by long-term wearing of left-right reversing spectacles. Ichikawa M, Kimura T, Egusa H, Nakatsuka M, Amano J, Ueda T, Tashiro T, Perception 32: 131-153 (2003)
œ Adaptation to left-right reversed vision rapidly activates ipsilateral visual cortex in humans. Miyauchi S, Egusa H, Amagase M, Sekiyama K, Imaruoka T, Tashiro T, Journal of Physiology Paris 98: 207-219 (2004)

Download@Movies
msorted by SUBJECT BEHAVIOR DATE]
About this experiment and movies
We perceive a lot of objects in the external world mainly through visual, tactile
and auditory sense organs, and operate them properly using our body, especially
our hands. This kind of sensori-motor cooridination is almost automatic in daily
life and we are not conscious of its existence. However, once we put on prisms and
lenses which optically transform our vision, this harmony is destroyed (See Fig. 1) .
Thus, investigation of the process of adaptation to optically transformed vision
gives us a lot of suggestions about psychological and physiological information
processing of our brain: how we perceive the external world, what reference
frames we use for cognition of space, how we operate objects properly using our
hands, the plasticity of our brain to environmental changes and so on.

What happens when we put on left-right reversing goggles?
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With the consent of all the experimenters and the subjects, we here present the
movie files of the experiment in which four subjects wore left-right reversing
goggles for 35 or 39 days except during sleeping. This experiment was
conducted from August to September in 1998. Two of them wore goggles for 35
days; the other two for 39 days. Twenty-seven experiments (psychological
experiments and fMRI experiments) were conducted before, during, and after
the period. Subjects f behaviors in these experiments and in their daily life were
recorded onto video tape. By watching them, you can see that the subjects were
perplexed after wearing left-right reversing goggles vision, struggled, adapted
gradually, and finally enjoyed them.
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The purposes of the release are as follows:

1.Not only for subjects, but also for experimenters, it is difficult to
conduct an experiment in which subjects wear left-right reversing
goggles for more than five weeks. So the movie files themselves are
valuable documentaries.

2.We want to share them with researchers in a variety of research fields
who are interested in the underlying brain mechanisms of visuomotor
coordination, integration of multisensory information processing, the
plasticity of human brain and so on. In other words, though a part of
the results of the experiments were published, we rather want to show
you adaptive changes to the optically transformed vision not only from
the experimental data, but also from actual behaviors of the subjects f
daily life during the experiment.
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3.We believe that the sharing of the movie files among researchers would
contribute the understanding of the issues described in the first
paragraph and would be of benefit to the progress of human
communication technology and the treatment of behavioral/cognitive
impairments.
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The movie files are compressed by mpeg and mpeg2. You can download either of
them freely for the purpose of academic and personal use. Please don ft hesitate to
send us any questions and opinions (e-mail address:.).
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Prof. Takara Tashiro:
Department of Psychology, Osaka City Univerisity, Osaka, Japan


Satoru Miyauchi Ph. D:
Brain Function Research Group, Kansai Advanced Research Center,
Communications Research Laboratory


Humihiko Hashimoto Ph. D:
Department of Ecomonics, Osaka City University, Osaka, Japan
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