Beiträge zur Physiologie des Verdauungstraktes

The function of receptors in the statocyst of the lobster Homarus americanus

“…Since the classic iron-filing experiments of Kreidl (1893), the statocyst has been considered as an organ essentially concerned with signalling persistent deviations from the normal spatial orientation. The response patterns of two kinds of receptors, the type I and type II position receptors, appear to fulfil the requirements of static position receptors.…”

“…It may be briefly stated that, in general, the statocyst was shown to play a role in the detection of absolute position (Kreidl, 1893) as well as in the co-ordination of locomotory movements (Clark, 1896). The results were, however, often conflicting, and only the dominant and most obvious parameters yielded to analysis of this nature.…”

“…MELVIN J. COHEN morphological studies of Farre (1843) and Hensen (1863), a great deal of physiological experimentation was carried out on the crustacean statocyst utilizing primarily behavioural observation before and after statocyst ablation. It may be briefly stated that, in general, the statocyst was shown to play a role in the detection of absolute position (Kreidl, 1893) as well as in the co-ordination of locomotory movements (Clark, 1896). The results were, however, often conflicting, and only the dominant and most obvious parameters yielded to analysis of this nature.…”

Aquatic organisms as models in biomedical space research

“…Their equilibration is thus shown to be seriously interfered with" (21). The role of statocysts was shown experimentally when shrimps were induced to form statoliths of iron particles instead of sand grains and then the animals became oriented to the lines of force of a magnet as they formerly did to gravity (22).…”