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Dorsal striatopallidal system in anurans
Heike Endepols1, Katja Roden, Harald Luksch
1Institute of Zoology, University of Cologne, D-50923 Köln, Germany. heike.endepols@uni-koeln.de
The Journal of Comparative Neurology
|December 4, 2003
Summary
This study precisely maps the anuran dorsal striatopallidal system using immunohistochemistry and tracing. Results suggest rostral striatum is homologous to mammalian striatum proper, and caudal striatum to dorsal pallidum.
Area of Science:
- Neuroscience
- Comparative Anatomy
- Amphibian Brain Research
Background:
- The dorsal striatopallidal system's boundaries in anurans remain debated.
- Understanding this system is crucial for comparative neuroanatomy.
Purpose of the Study:
- To precisely delineate the dorsal striatopallidal system in anuran amphibians.
- To establish homologies between anuran and mammalian striatopallidal structures.
Main Methods:
- Quantitative analysis of leucine-enkephalin immunohistochemistry.
- Retrograde neurobiotin tracing studies.
- Double-labeling tracing studies.
Main Results:
- Enkephalin-positive neurons are concentrated in the rostral and intermediate striatum.
- Neurons projecting to thalamic nuclei are located in the intermediate and caudal striatum.
- Distinct neuronal populations innervate the caudal striatum and lateral forebrain bundle.
Conclusions:
- The rostral anuran striatum is homologous to the mammalian striatum proper.
- The caudal anuran striatum is comparable to the mammalian dorsal pallidum.
- The intermediate striatum functions as a transitional zone.