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A dorsal light reflex in a squid.

T Preuss·B U Budelmann
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Abstract

A dorsal light reflex is described in the squid Lolliguncula brevis. When illuminated from the side in visually homogeneous surroundings, a free-swimming squid rolls the dorsal side of its head and trunk 10-20 degrees towards the light. With the trunk restricted in a holder, the squid rolls its head 4-5 degrees towards the light; this reaction increases by about 50% when the statocysts are bilaterally removed and increases further when the neck receptor organ is also destroyed. The results indicate a multi-modal interaction of visual, statocyst and proprioceptive inputs during postural control.

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AnimalsDecapodiformesLightLocomotionMechanoreceptorsPostureProprioceptionReflexRotationSense OrgansJournal ArticleResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, P.H.S.

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T Preuss, B U Budelmann. 1995. A dorsal light reflex in a squid.. https://doi.org/10.1242/jeb.198.5.1157

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