Functional dissociation along the rostrocaudal axis of Japanese quail hippocampus
Reads0
Chats0
TLDR
In this paper , Japanese quail (Coturnix japonica) showed functional segregation along the rostrocaudal axis of the avian Hp that is comparable in part to distinctions seen along the mammalian hippocampal septotemporal axis.Abstract:
The mammalian hippocampus (Hp) can be functionally segregated along its septotemporal axis, with involvement of dorsal hippocampus (dHp) in spatial memory and ventral hippocampus (vHp) in stress responses and emotional behaviour. In the present study, we investigate comparable functional segregation in proposed homologues within the avian brain. Using Japanese quail (Coturnix Japonica), we report that bilateral lesions of the rostral hippocampus (rHp) produce robust deficits in a spatial Y-maze discrimination (YMD) test while sparing performance during contextual fear conditioning (CFC), comparable to results from lesions to homologous regions in mammals. In contrast, caudal hippocampus (cHp) lesions failed to produce deficits in either CFC or YMD, suggesting that, unlike mammals, both cHp and rHp of birds can support emotional behavior. These observations demonstrate functional segregation along the rostrocaudal axis of the avian Hp that is comparable in part to distinctions seen along the mammalian hippocampal septotemporal axis.read more
Citations
More filters
Posted ContentDOI
An entorhinal-like region in food-caching birds
TL;DR: In this article , the authors mapped extrinsic hippocampal connections in chickadees, whose hippocampi are used for remembering numerous food caches and found a well-delineated structure in these birds that is topologically similar to the entorhinal cortex and interfaces between the hippocampus and other pallial regions.
Journal ArticleDOI
An entorhinal-like region in food-caching birds
TL;DR: In this article , the authors mapped extrinsic hippocampal connections in chickadees and found a well-delineated structure in these birds that is topologically similar to the entorhinal cortex and interfaces between the hippocampus and other pallial regions.
Posted ContentDOI
Topography of inputs into the hippocampal formation of a food-caching bird
TL;DR: The authors used retrograde tracing to map inputs into the hippocampus of a food-caching bird, the black-capped chickadee, and found that almost all inputs were topographic along this direction.
References
More filters
Journal ArticleDOI
Are the Dorsal and Ventral Hippocampus Functionally Distinct Structures
TL;DR: Behavior, anatomical, and gene expression studies that together support a functional segmentation into three hippocampal compartments are reviewed, finding gene expression in the dorsal hippocampus correlates with cortical regions involved in information processing, while genes expressed in the ventral hippocampus correlate with regions involved with emotion and stress.
Journal ArticleDOI
Regional dissociations within the hippocampus--memory and anxiety.
David M. Bannerman,J. N. P. Rawlins,Stephen B. McHugh,Robert M. J. Deacon,Benjamin K. Yee,Tobias Bast,Wei-Ning Zhang,Helen H. J. Pothuizen,Joram Feldon +8 more
TL;DR: Gray and McNaughton's theory can in principle incorporate these apparently distinct hippocampal functions, and provides a plausible unitary account for the multiple facets of hippocampal function.
Journal ArticleDOI
Functional organization of the hippocampal longitudinal axis
TL;DR: Together, anatomical studies and electrophysiological recordings in rodents suggest a model in which functional long-axis gradients are superimposed on discrete functional domains, which provides a potential framework to explain and test the multiple functions ascribed to the hippocampus.
Journal ArticleDOI
Spatial learning impairment parallels the magnitude of dorsal hippocampal lesions, but is hardly present following ventral lesions
TL;DR: The dorsal half of the hippocampus appears more important for spatial learning than the ventral half, with a threshold at about 20% of the total hippocampal volume, under which normal learning can occur.
Journal ArticleDOI
Spatial learning with a minislab in the dorsal hippocampus
TL;DR: The volume and location of hippocampal tissue required for normal acquisition of a spatial memory task are determined and hippocampal-dependent spatial learning only requires a minislab of dorsal hippocampusal tissue.
Related Papers (5)
Participation of the Eyes in the Photosexual Response of Japanese Quail (Coturnix coturnix japonica)
T. D. Siopes,Wilbor O. Wilson +1 more