A dorsal light reflex in a squid

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...

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Veröffentlicht in:	Journal of experimental biology 1995-05, Vol.198 (Pt 5), p.1157-1159
Hauptverfasser:	Preuss, T, Budelmann, B U
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal behavior Animals Cephalopoda Decapodiformes - physiology Decapodiformes - radiation effects Light Locomotion - physiology Locomotion - radiation effects Lolliguncula brevis Marine Mechanoreceptors - physiology Mollusks Posture - physiology Proprioception - physiology Reflex - radiation effects Rotation Sense Organs - physiology
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Beschreibung
Zusammenfassung:	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.
ISSN:	0022-0949 1477-9145
DOI:	10.1242/jeb.198.5.1157