Afferent and efferent connections of the thalamic eminence in the axolotl, Ambystoma mexicanum.

Afferent and efferent connections of the thalamic eminence of the axolotl were determined using the fluorescent compound DiI as a tracer. The thalamic eminence is connected reciprocally with a number of telencephalic and diencephalic areas, particularly with the medial pallium, the amygdala and the preoptic region. Efferent connections are widespread throughout the ipsilateral diencephalon. These findings are discussed in relation to the homology of this nucleus, especially its homologue in agnathan brains.