Nucleus Rostrolateralis: An Expansion of the Epithalamus in Some Actinopterygii

作者：Saidel William M^*

来源：Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology, 2013, 296(10): 1594-1602.

DOI：10.1002/ar.22761

• nucleus rostrolateralis
• nucleus interpeduncularis
• DiI tract tracing
• dorsal diencephalic conduction system
• epithalamus
• African butterflyfish

The diencephalic nucleus rostrolateralis (RL) in the African butterfly fish (Pantodon buchholzi) is a brain nucleus identified in fewer than a dozen of the approximate to 25,000 species of actinopterygian fishes. Located in the rostrolateral diencephalon, this nucleus in Pantodon receives direct and indirect visual input from the superior visual field. Its lack of precedent or consistent phylogenetic expression creates a difficulty in interpreting the functional role of this nucleus within the visual system. By tracing experiments, RL was found to be afferent to nucleus interpeduncularis (IP) and the target of cells from the subpallium of the telencephalon. RL is a component of a descending telencephalic pathway involved in at least one behavior at the intersection of limbic and somatic activitiesfeeding. The parallelism between the ventral telencephalonRLIP and the limbic/striatalhabenulaIP pathway (the dorsal diencephalic conduction system, DDCS) suggests that RL is a component within the DDCS. Moreover, the hodological connections of RL suggest that RL is likely a hypertrophy of the lateral habenula. Anat Rec, 296:1594-1602, 2013.

• 出版日期2013-10