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h FLOCK
the central nervous system. This presentation is concerned with sensory
transduction in the peripheral organ, for information about the biological
significance of the organ system and behavioral aspects other sources are
referred to. In 1966 the first conference on lateral line detectors was held.
The proceedings from this conference contains a wealth of knowledge
about this sensory system, and the reader is referred to this work as well
as to a monograph by Dijkgraaf (1963) for extensive literature references.
11. STRUCTURE OF THE SENSE ORGAN
The mechanoreceptor organs of the lateral line system extract information of water motion from the external environment. Relevant modes
of water motion include laminar flow (Gijrner, 1963) as well as surface
wave eddies (Schwartz, 1967) and near-field displacement caused by
vibrating sources (Harris and van Bergeijk, 1962). The adequate stimulus
for an organ depends on the characteristics of the mechanical coupling
between the organ and the environment. In each case, however, the
adequate stimulus for the hair cell is the bending, or the angular displacement, of the sensory hairs that extend as a bundle from the apical end
Fig. 1. In the canal organs of Lota lotu the cupula rests on the sensory epithelium at the bottom of a bony half-cylinder.
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