Deficits in landmark navigation and path integration after lesions of the interpeduncular nucleus.

Benjamin J. Clark; Jeffrey S. Taube

doi:10.1037/a0015477

Theta rhythm of navigation: Link between path integration and landmark navigation, episodic and semantic memory

Hippocampus ◽

10.1002/hipo.20113 ◽

2005 ◽

Vol 15 (7) ◽

pp. 827-840 ◽

Cited By ~ 440

Author(s):

György Buzsáki

Keyword(s):

Semantic Memory ◽

Path Integration ◽

Theta Rhythm ◽

Landmark Navigation

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Ageing effects on path integration and landmark navigation

Hippocampus ◽

10.1002/hipo.22011 ◽

2012 ◽

Vol 22 (8) ◽

pp. 1770-1780 ◽

Cited By ~ 51

Author(s):

Mathew A. Harris ◽

Thomas Wolbers

Keyword(s):

Path Integration ◽

Ageing Effects ◽

Landmark Navigation

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Landmark navigation in a mantis shrimp

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2020.1898 ◽

2020 ◽

Vol 287 (1936) ◽

pp. 20201898

Author(s):

Rickesh N. Patel ◽

Thomas W. Cronin

Keyword(s):

Path Integration ◽

Navigation Systems ◽

Integration System ◽

Tropical Waters ◽

Mantis Shrimp ◽

Positional Uncertainty ◽

Landmark Navigation ◽

Navigational System ◽

Accumulated Error

Mantis shrimp commonly occupy burrows in shallow, tropical waters. These habitats are often structurally complex where many potential landmarks are available. Mantis shrimp of the species Neogonodactylus oerstedii return to their burrows between foraging excursions using path integration, a vector-based navigational strategy that is prone to accumulated error. Here, we show that N. oerstedii can navigate using landmarks in parallel with their path integration system, correcting for positional uncertainty generated when navigating using solely path integration. We also report that when the path integration and landmark navigation systems are placed in conflict, N. oerstedii will orientate using either system or even switch systems enroute. How they make the decision to trust one navigational system over another is unclear. These findings add to our understanding of the refined navigational toolkit N. oerstedii relies upon to efficiently navigate back to its burrow, complementing its robust, yet error prone, path integration system with landmark guidance.

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Landmark navigation in a mantis shrimp

10.1101/2020.03.12.988741 ◽

2020 ◽

Cited By ~ 1

Author(s):

Rickesh N. Patel ◽

Thomas W. Cronin

Keyword(s):

Path Integration ◽

Navigation Systems ◽

Integration System ◽

Tropical Waters ◽

Mantis Shrimp ◽

Landmark Navigation ◽

Navigational System ◽

Accumulated Error

SummaryMantis shrimp are predatory crustaceans that commonly occupy burrows in shallow, tropical waters worldwide. Most of these animals inhabit structurally complex, benthic environments where many potential landmarks are available. Mantis shrimp of the species Neogonodactylus oerstedii return to their burrows between foraging excursions using path integration, a vector-based navigational strategy that is prone to accumulated error. Here we show that N. oerstedii can navigate using landmarks in parallel with their path integration system, offseting error generated when navigating using solely path integration. We also report that when the path integration and landmark navigation systems are placed in conflict, N. oerstedii will orient using either system or even switch systems enroute. How they make the decision to trust one navigational system over another is unclear. These findings add to our understanding of the refined navigational toolkit N. oerstedii relies upon to efficiently navigate back to its burrow, complementing its robust, yet error prone, path integration system with landmark guidance.

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Immunocytochemical methodology for the localization of neuronal antigens at the ultrastructural level

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100161941 ◽

1990 ◽

Vol 48 (3) ◽

pp. 876-877

Author(s):

Jorge Pecci Saavedra ◽

Mark Connaughton ◽

Juan José López ◽

Alicia Brusco

Keyword(s):

Spinal Cord ◽

Substantia Nigra ◽

Polyclonal Antibodies ◽

Ultrastructural Level ◽

Point Of View ◽

Nerve Tissue ◽

Tissue Fixation ◽

Optimal Conditions ◽

Interpeduncular Nucleus ◽

Technical Point

The use of antibodies as labels for the localization of specific molecules in the nervous systan has been extensively applied in recent years. Both monoand polyclonal antibodies or antisera have been employed. The knowledge of the organization of neuronal connectivities, gliovascular relationships, glioneuronal relationships and other features of nerve tissue has greatly increased.A number of areas of the nervous systan have been analyzed in our laboratory, including the nuclei of the raphe system, the reticular formation, interpeduncular nucleus, substantia nigra, caudate nucleus, putamen, pallidum, spinal cord, pineal gland and others.From a technical point of view, a number of variables needed to be taken into account in order to obtain reliable and reproducible results. The design of the optimal conditions of tissue fixation, embedding, sectioning, dilution of antibodies, and adaptation of Sternberger PAP technique were sane of the parameters taken into account to optimize the results. It is critical that each step of the technique be defined for each particular case.

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