Overlapping visual fields and ipsilateral retinal projections in turtles.
The possible relationship between overlap of the visual fields and the importance of ipsilateral retinal projections was investigated in the two Chelonian genera Chinemys and Trionyx. Of these two species, Trionyx has more frontally located eyes, yet ipsilateral retinal projections could not be demonstrated by radioautography. In Chinemys, on the other hand, the ipsilateral retinothalamic projections are extensive. It is suggested that, in contrast to Trionyx, the anatomic substrate of stereoscopic vision in Chinemys may be similar to that in mammals.
Hergueta
S
S
Laboratoire d'Anatomie Comparée, Muséum National d'Histoire Naturelle, Paris, France.
Ward
R
R
Lemire
M
M
Rio
J P
JP
Reperant
J
J
Weidner
C
C
D000818:Animals; D001345:Autoradiography; D012160:Retina / Q000502:physiology*; D014426:Turtles / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology; D014794:Visual Fields / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology*