ISSN:
1432-1351
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Medizin
Notizen:
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 (¯X W) than during antiworm stimulation (¯X A), i.e.¯X W〉¯X A. The latter visual pattern led to a 2DG utilization that was statistically significant stronger than during stimulation with a square (¯X S), i.e.¯X A〉¯X S. Thus, in comparison between right and left hemisphere as well as between brains the following ratios were obtained: Optic tectum:¯X W〉¯X A〉¯X S; nucleus isthmi:¯X W〉¯X A-¯X s; posterodorsal lateral thalamic nucleus:¯X S〉¯X A〉¯X W; posteroventral lateral thalamic nucleus:¯X S〉¯X A≃¯X W; posterior thalamic nucleus:¯X W〉¯X A≃¯X S; anteripr division of the lateral thalamic nucleus:¯X W〉¯X A≃¯X S; anterior thalamic nucleus:¯X A〉¯X S〉¯X W; nucleus of Bellonci and dorsal division of the ventrolateral thalamic nucleus:¯X W≃¯X A≃¯X S; cerebellum:¯X S≃¯X W〉¯X A.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00613968
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