| |  Online-Ressource |
|---|
| Verfasst von: | Almada, Rafael Carvalho [VerfasserIn]  |
|---|
| | Genewsky, Andreas J. [VerfasserIn] |
|---|
| | Heinz, Daniel E. [VerfasserIn] |
|---|
| | Kaplick, Paul M. [VerfasserIn] |
|---|
| | Coimbra, Norberto C. [VerfasserIn] |
|---|
| | Wotjak, Carsten T. [VerfasserIn] |
|---|
| Titel: | Stimulation of the nigrotectal pathway at the level of the superior colliculus reduces threat recognition and causes a shift from avoidance to approach behavior |
|---|
| Verf.angabe: | Rafael C. Almada, Andreas J. Genewsky, Daniel E. Heinz, Paul M. Kaplick, Norberto C. Coimbra and Carsten T. Wotjak |
|---|
| E-Jahr: | 2018 |
|---|
| Jahr: | 07 May 2018 |
|---|
| Umfang: | 9 S. |
|---|
| Fussnoten: | Gesehen am 06.05.2020 |
|---|
| Titel Quelle: | Enthalten in: Frontiers in neural circuits |
|---|
| Ort Quelle: | Lausanne : Frontiers Research Foundation, 2007 |
|---|
| Jahr Quelle: | 2018 |
|---|
| Band/Heft Quelle: | 12(2018) Artikel-Nummer 36, 9 Seiten |
|---|
| ISSN Quelle: | 1662-5110 |
|---|
| Abstract: | Defensive behavioral responses are essential for survival in threating situations. The superior colliculus (SC) has been implicated in the generation of defensive behaviors elicited by visual, tactile, and auditory stimuli. Furthermore, substantia nigra pars reticulata (SNr) neurons are known to exert a modulatory effect on midbrain tectum neural substrates. However, the functional role of this nigrotectal pathway in threating situations is still poorly understood. Using optogenetics in freely behaving mice, we activated SNr projections at the level of the SC, and assessed consequences on behavioral performance in an open field test (OFT) and the beetle mania task (BMT). The latter confronts a mouse with an erratic moving robo-beetle and allows to measure active and passive defensive responses upon frequent encounter of the threatening object. Channelrhodopsin-2 (ChR2)-mediated activation of the inhibitory nigrotectal pathway did not affect anxiety-like and exploratory behavior in the OFT, but increased the number of contacts between robo-beetle and test mouse in the BMT. Depending on the size of the arena, active avoidance responses were reduced, whereas tolerance and close following of the robo-beetle were significantly increased. We conclude from the data that the nigrotectal pathway plays holds the potential to modulate innate fear by attenuating threat recognition and causing a shift from defensive to approach behavior. |
|---|
| DOI: | doi:10.3389/fncir.2018.00036 |
|---|
| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext ; Verlag: https://doi.org/10.3389/fncir.2018.00036 |
|---|
| | Volltext: https://www.frontiersin.org/articles/10.3389/fncir.2018.00036/full |
|---|
| | DOI: https://doi.org/10.3389/fncir.2018.00036 |
|---|
| Datenträger: | Online-Ressource |
|---|
| Sprache: | eng |
|---|
| Sach-SW: | beetle mania task (BMT) |
|---|
| | deep layers of superior colliculus (dlSC) |
|---|
| | Fear |
|---|
| | nigrotectal pathway |
|---|
| | optogenetics |
|---|
| | robo-beetle |
|---|
| | substantia nigra pars reticulata (SNr) |
|---|
| K10plus-PPN: | 1697314163 |
|---|
| Verknüpfungen: | → Zeitschrift |
|---|
Stimulation of the nigrotectal pathway at the level of the superior colliculus reduces threat recognition and causes a shift from avoidance to approach behavior / Almada, Rafael Carvalho [VerfasserIn]; 07 May 2018 (Online-Ressource)
