The pupillary response of cephalopods.
J Exp Biol
; 208(Pt 2): 261-5, 2005 Jan.
Article
en En
| MEDLINE
| ID: mdl-15634845
ABSTRACT
This paper provides the first detailed description of the time courses of light-evoked pupillary constriction for two species of cephalopods, Sepia officinalis (a cuttlefish) and Eledone cirrhosa (an octopus). The responses are much faster than hitherto reported, full contraction in Sepia taking less than 1 s, indicating it is among the most rapid pupillary responses in the animal kingdom. We also describe the dependence of the degree of pupil constriction on the level of ambient illumination and show considerable variability between animals. Furthermore, both Sepia and Eledone lack a consensual light-evoked pupil response. Pupil dilation following darkness in Sepia is shown to be very variable, often occurring within a second but at other times taking considerably longer. This may be the result of extensive light-independent variations in pupil diameter in low levels of illumination.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Reflejo Pupilar
/
Luz
/
Moluscos
Límite:
Animals
Idioma:
En
Revista:
J Exp Biol
Año:
2005
Tipo del documento:
Article
País de afiliación:
Reino Unido