Amygdala and Emotional Learning in Vertebrates – A Comparative Perspective

Vargas, Juan Pedro; López, Juan Carlos; Portavella, Manuel

doi:10.5772/51552

Cited by 7 publications

(5 citation statements)

References 221 publications

(296 reference statements)

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“…This region is homologous to the mammalian frontotemporal amygalar cluster (Maximino et al, 2013a). The "classical model" of the role of the amygdala in fear involves aversive learning in the frontotemporal amygdala, while the behavioral output would be mediated by the autonomic/limbic amygdala (Vargas et al, 2012). Recent evidence, however, suggests that the frontotemporal amygdala is involved in encoding emotional events (including aversive stimuli and contexts) with refer- fective significance (Balleine and Killcross, 2006).…”

Section: Discussionmentioning

confidence: 99%

The Aversive Brain System of Teleosts: Implications for Neuroscience and Biological Psychiatry

Silva¹,

Lima-Maximino²,

Maximino³

2018

Preprint

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Defensive behavior is a function of specific survival circuits, the “aversive brain system”, that are thought to be conserved across vertebrates, and involve threat detection and the organization of defensive responses to reduce or eliminate threat. In mammals, these circuits involve amygdalar and hypothalamic subnuclei and midbrain circuits. The increased interest in teleost fishes as model organisms in neuroscience created a demand to understand which brain circuits are involved in defensive behavior. Telencephalic and habenular circuits represent a “forebrain circuit” for threat processing and organization of responses, being important to  mounting appropriate coping responses. Specific hypothalamic circuits organize neuroendocrine and neurovegetative outputs, but are the less well-studied in fish. A “midbrain circuit” is represented by projections to interneurons in the optic tectum which mediate fast escape responses via projections to the central gray and/or the brainstem escape network. Threatening stimuli (especially visual stimuli) can bypass the “high road” and directly activate this system, initiating escape responses. Increased attention to these circuits in an evolutionary framework is still needed.

show abstract

Section: Discussionmentioning

confidence: 99%

The Aversive Brain System of Teleosts: Implications for Neuroscience and Biological Psychiatry

Silva¹,

Lima-Maximino²,

Maximino³

2018

Preprint

View full text Add to dashboard Cite

show abstract

“…This region is homologous to the mammalian frontotemporal amygalar cluster (Maximino et al, 2013a). The "classical model" of the role of the amygdala in fear involves aversive learning in the frontotemporal amygdala, while the behavioral output would be mediated by the autonomic/limbic amygdala (Vargas et al, 2012). Recent evidence, however, suggests that the frontotemporal amygdala is involved in encoding emotional events (including aversive stimuli and contexts) with reference to particular sensory features, while the autonomic amygdala encodes the motivational or affective significance (Balleine and Killcross, 2006).…”

Section: Discussionmentioning

confidence: 99%

The aversive brain system of teleosts: Implications for neuroscience and biological psychiatry

Silva

Lima-Maximino

Maximino

2018

Neuroscience & Biobehavioral Reviews

View full text Add to dashboard Cite

Defensive behavior is a function of specific survival circuits, the "aversive brain system", that are thought to be conserved across vertebrates, and involve threat detection and the organization of defensive responses to reduce or eliminate threat. In mammals, these circuits involve amygdalar and hypothalamic subnuclei and midbrain circuits. The increased interest in teleost fishes as model organisms in neuroscience created a demand to understand which brain circuits are involved in defensive behavior. Telencephalic and habenular circuits represent a "high road" for threat processing and organization of responses, being important to mounting appropriate coping responses. Specific hypothalamic circuits organize neuroendocrine and neurovegetative outputs, but are the less wellstudied in fish. A "low road" is represented by projections to interneurons in the optic tectum which mediate fast escape responses via projections to the central gray and/or the brainstem escape network (not shown). Threatening stimuli (especially visual stimuli) can bypass the "high road" and directly activate this system, initiating escape responses. Increased attention to these circuits in an evolutionary framework is still needed.

show abstract

“…Although there are suggestions that emotions existed much earlier in animal phylogeny than previously assumed (e.g., in fish: Cerqueira et al, 2017;Rey et al, 2015;Vargas, López, & Portavella, 2012), it is important to be cautious not only about which emotions we are talking about, but also about how these are classified, qualitatively and quantitatively. Researchers should always describe how emotions are being defined, for example, whether the work is based on physiological parameters, brain activation patterns, behavioral expression, or a combination of these.…”

Section: Concepts and Frameworkmentioning

confidence: 99%

Animal and human emotion: Concepts and methodologies

Caeiro¹

2017

Animal Sentience

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Amygdala and Emotional Learning in Vertebrates – A Comparative Perspective

Cited by 7 publications

References 221 publications

The Aversive Brain System of Teleosts: Implications for Neuroscience and Biological Psychiatry

The Aversive Brain System of Teleosts: Implications for Neuroscience and Biological Psychiatry

The aversive brain system of teleosts: Implications for neuroscience and biological psychiatry

Animal and human emotion: Concepts and methodologies

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