Journal of Comparative Physiology A

, Volume 156, Issue 4, pp 433–445 | Cite as

Mapping of brain activity in mesencephalic and diencephalic structures of toads during presentation of visual key stimuli: a computer assisted analysis of (14C)2DG autoradiographs

  • T. Finkenstädt
  • N. T. Adler
  • T. O. Allen
  • S. O. E. Ebbesson
  • J. -P. Ewert
Article

Summary

The (14C)2DG autoradiographic technique has been employed to quantitatively map glucose utilization in the mesencephalon, the diencephalon and the cerebellum, of toads in response to configurational moving visual stimuli: (i) a 0.4 cm × 2.8 cm worm-like stripe (W) which elicited prey catching responses, (ii) a 8.4 cm × 8.4 cm square (S) that released predator avoidance responses, and (iii) a 2.8 cm × 0.4 cm antiworm-like stripe (A) which elicited no motor activity.

For various brain nuclei different relationships were obtained: The optic tectum showed statistical significant higher 2DG uptake during worm-stimulation (¯XW) than during antiworm stimulation (¯XA), i.e.¯XW>¯XA. The latter visual pattern led to a 2DG utilization that was statistically significant stronger than during stimulation with a square (¯XS), i.e.¯XA>¯XS. Thus, in comparison between right and left hemisphere as well as between brains the following ratios were obtained:

Optic tectum:¯XW>¯XA>¯XS; nucleus isthmi:¯XW>¯XA-¯Xs; posterodorsal lateral thalamic nucleus:¯XS>¯XA>¯XW; posteroventral lateral thalamic nucleus:¯XS>¯XA¯XW; posterior thalamic nucleus:¯XW>¯XA¯XS; anteripr division of the lateral thalamic nucleus:¯XW>¯XA¯XS; anterior thalamic nucleus:¯XA>¯XS>¯XW; nucleus of Bellonci and dorsal division of the ventrolateral thalamic nucleus:¯XW¯XA¯XS; cerebellum:¯XS¯XW>¯XA.

Abbreviations

A

anterior thalamic nucleus

Cb

cerebellum

Hyp

hypothalamus

Ist

nucleus isthmi

cl. Ist

contralateral Ist

La

lateral thalamic nucleus, anterior division

Lpd

lateral thalamic nucleus, posterodorsal division

Lpv

lateral thalamic nucleus, posteroventral division

MP

medial pallium

NB/VLd

nucleus of Bellonci and ventrolateral thalamic nucleus, dorsal division

P

posterior thalamic nucleus

PO

preoptic area

Sna

snapping evoking area=ventrolateral tectum

Str

striatum

Tec

tectum opticum

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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • T. Finkenstädt
    • 1
  • N. T. Adler
    • 2
  • T. O. Allen
    • 2
  • S. O. E. Ebbesson
    • 3
  • J. -P. Ewert
    • 1
  1. 1.Neuroethology and Biocybernetics LaboratoriesUniversity of KasselKasselGermany
  2. 2.Psychology DepartmentUniversity of PennsylvaniaPhiladelphiaUSA
  3. 3.Medical CenterLouisiana State UniversityShreveportUSA

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