Spatial memory and hippocampal pallium through vertebrate evolution: insights from reptiles and teleost fish

Rodrı́guez, Fernando; López, Juan Carlos; Vargas, Juan Pedro; Broglio, Cristina; Gómez, Yolanda Fontanil; Salas, Cosme

doi:10.1016/s0361-9230(01)00682-7

Cited by 218 publications

(151 citation statements)

References 30 publications

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“…However, a recent study has shown a cryptic laminar and columnar organization of the dorsolateral pallium (DL) of a gymnotiform weakly electric fish which, together with other organizational structures, supports the hypothesis that there is a homology between the teleost DL and the mammalian cortex (34). Furthermore the pallium of G. petersii is known to receive inputs from the auditory, the visual, the electrosensory, and the lateral line systems (35), and lesion experiments in goldfish have shown that the teleost telencephalon is involved in spatial learning tasks (36)(37)(38), making it a prime candidate for the location of cross-modal object recognition in G. petersii. Other brain areas such as the tectum opticum, the torus semicirularis, and the valvula cerebelli also receive multiple sensory inputs in G. petersii and therefore could also be involved in crossmodal transfers.…”

Section: Discussionmentioning

confidence: 68%

Cross-modal object recognition and dynamic weighting of sensory inputs in a fish

Schumacher

Perera

Thenert

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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Most animals use multiple sensory modalities to obtain information about objects in their environment. There is a clear adaptive advantage to being able to recognize objects cross-modally and spontaneously (without prior training with the sense being tested) as this increases the flexibility of a multisensory system, allowing an animal to perceive its world more accurately and react to environmental changes more rapidly. So far, spontaneous cross-modal object recognition has only been shown in a few mammalian species, raising the question as to whether such a high-level function may be associated with complex mammalian brain structures, and therefore absent in animals lacking a cerebral cortex. Here we use an objectdiscrimination paradigm based on operant conditioning to show, for the first time to our knowledge, that a nonmammalian vertebrate, the weakly electric fish Gnathonemus petersii, is capable of performing spontaneous cross-modal object recognition and that the sensory inputs are weighted dynamically during this task. We found that fish trained to discriminate between two objects with either vision or the active electric sense, were subsequently able to accomplish the task using only the untrained sense. Furthermore we show that crossmodal object recognition is influenced by a dynamic weighting of the sensory inputs. The fish weight object-related sensory inputs according to their reliability, to minimize uncertainty and to enable an optimal integration of the senses. Our results show that spontaneous cross-modal object recognition and dynamic weighting of sensory inputs are present in a nonmammalian vertebrate. multisensory integration | perception | sensory transfer | sensory reliability | sensory conflict

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Section: Discussionmentioning

confidence: 68%

Cross-modal object recognition and dynamic weighting of sensory inputs in a fish

Schumacher

Perera

Thenert

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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“…The presence of grid cells in different orders suggests that grid cells appeared early in evolution and so may be present across a wide span of mammalian species. It is even possible that grid cells exist in reptiles, such as lizards, or in bony fish, which have brain circuits similar to those of the mammalian hippocampus and which navigate space in ways not too different from rodents and bats, respectively 177 . This possibility is reinforced by the fact that navigation in turtles and goldfish depends on homologues of the mammalian hippocampus 178,179 .…”

Section: Evolution Of Grid Cells and A Wider Perspectivementioning

confidence: 99%

Grid cells and cortical representation

et al. 2014

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One of the grand challenges in neuroscience is to comprehend neural computation in the association cortices, the parts of the cortex that have shown the largest expansion and differentiation during mammalian evolution and that are thought to contribute so profoundly to the emergence of advanced cognition in humans. In this review, we will use grid cells in the medial entorhinal cortex as a gateway to understanding network computation at a stage of cortical processing where firing patterns are shaped not primarily by incoming sensory signals but to a large extent by intrinsic properties of the local circuit.

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“…Histologically, neurons containing AChE were detected in most areas of the central nervous system, including the olfactory bulb, telencephalon, cerebellum, medulla oblongata, and spinal cord (Clemente et al, 2004). In particular, the telencephalon, which is thought to be responsible for learning in teleost fishes such as zebrafish and goldfish (Portavella et al, 2002;Rodriguez et al, 2002), appeared to have AChE-positive neurons in various nuclei of the dorsal and ventral areas. Furthermore, the presence of choline acetyltransferase immunoreactive axons in the telencephalon indicates that the AChE-positive neurons are indeed cholinoceptive.…”

Section: Introductionmentioning

confidence: 99%