Yasuji Sawada
Research Institute of Electrical Communication
Tohoku University, Sendai 980, Japan
sawada@sawada.riec.tohoku.ac.jp
We discuss in the first part of this paper
the nature of cell motions in biological
organisms in relation to self-organization
and body motion based on a series of experimental
studies of hydra and dictyostelium: model
biological organisms. We present optical
and NMR experimental results on the cell
motions and deformations in these model organisms
during self-organization and migration. .
Secondly we discuss recently observed Turing-type
symmetry breaking patterns in 2d-aggregate
of dictyostelium and the realistic situation
of the ``proportion regulation'' of dictyostelium.
We discuss the relation of these apparently
contradicting two mechanisms.
Thirdly we discuss what is the living state
of biological organism. Here we define the
subjective state of higher animals based
on the psycho-physical experimentals of the
motion of hands in response to the motion
of the target visually recognized. The experimental
data showed that the motion of the hand clearly
preceeds the motion of the target and the
magnitude of the foresight is related to
the value minimyzing the future expected
error. Base on these experimental observation
we discuss the living state and the subjective
state of biological organusms.