What is the amygdala?

@article{Swanson1998WhatIT,
  title={What is the amygdala?},
  author={Larry W. Swanson and Gorica D. Petrovich},
  journal={Trends in Neurosciences},
  year={1998},
  volume={21},
  pages={323-331}
}
'Amygdala' and 'amygdalar complex' are terms that now refer to a highly differentiated region near the temporal pole of the mammalian cerebral hemisphere. Cell groups within it appear to be differentiated parts of the traditional cortex, the claustrum, or the striatum, and these parts belong to four obvious functional systems--accessory olfactory, main olfactory, autonomic and frontotemporal cortical. In rats, the central nucleus is a specialized autonomic-projecting motor region of the… 
Amygdala (Amygdaloid Complex)
Originally named for its almond shape in human brain, ‘amygdala’ and ‘amygdaloid complex’ are terms that now refer to a highly differentiated region near the temporal pole of the mammalian cerebral
Is There an Amygdala and How Far Does It Extend?
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  • Psychology, Medicine
    Annals of the New York Academy of Sciences
  • 2003
TLDR
Recently, it was suggested that the amygdala is not a single neurobiological entity, but is better conceived as a region where several distinct structures, each with affiliations with different systems, are in close proximity to each other.
Topography of projections from amygdala to bed nuclei of the stria terminalis
TLDR
A collection of 125 PHAL experiments in the rat has been analyzed to characterize the organization of projections from each amygdalar cell group to the bed nuclei of the stria terminalis, which surround the crossing of the anterior commissure.
Piriform Cortex and Amygdala
Publisher Summary A ventral view of the cerebral hemispheres of mammals shows an array of structures ultimately connected with the olfactory bulbs through the olfactory tracts. This is the basis for
Bed nucleus of the stria terminalis and extended amygdala inputs to dopamine subpopulations in primates
TLDR
It is suggested that specific subdivisions of the bed nucleus of the stria terminalis have differential influences on the dopamine subpopulations, influencing dopamine responses in diverse brain regions.
Interneurons in the basolateral amygdala
TLDR
This review discusses recent findings on the physiology and plasticity of inputs to interneurons in the basolateral amygdala, the primary input station of the amygdala, and their relationship to fear learning.
Anatomical Organization of the Extended Amygdala
The concept of the extended amygdala proposed by de Olmos and Heimer suggests that the central (CEA) and medial nuclei of the amygdala (MEA) and the bed nucleus of stria terminalis (BST) are parts of
Neuronal diversity of the amygdala and the bed nucleus of the stria terminalis.
TLDR
The advances of knowledge on neuronal diversity in the amygdala complex and the BNST are described, based on recent functional studies, performed at genetic, molecular, physiological, and anatomical levels in rodent models, especially rats and mice.
Amygdala: Structure and Function
The amygdala is considered a key center in managing emotional information and its dysfunction is at the base of disorders ranging through anxiety, depression, PTSD and autism. However, the amygdala
Emotion and cognition and the amygdala: From “what is it?” to “what's to be done?”
  • L. Pessoa
  • Medicine, Psychology
    Neuropsychologia
  • 2010
The amygdala is a fascinating, complex structure that lies at the center of much of our current thinking about emotion. Here, I will review data that suggest that the amygdala is involved in several
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References

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Connections of the posterior nucleus of the amygdala
TLDR
Experiments with fluorogold and phaseolus vulgaris leucoagglutinin (PHAL) indicate that the major neuronal input to the PA arises in the ventral premammillary nucleus, and that substantial projections also arise in olfactory‐related areas such as the medial nucleus of the amygdala.
Organization of intra-amygdaloid circuitries in the rat: an emerging framework for understanding functions of the amygdala
TLDR
These findings suggest that after the stimulus enters the amygdala, the highly organized intra-amygdaloid circuitries provide a pathway by which the representation of a stimulus becomes distributed in parallel to various amygdaloids nuclei.
Projections of the ventral subiculum to the amygdala, septum, and hypothalamus: A PHAL anterograde tract‐tracing study in the rat
The projections of the ventral subiculum are organized differentially along the dorsoventral (or septotemporal) axis of this cortical field, with more ventral regions playing a particularly important
Organization of amygdaloid projections to the prefrontal cortex and associated striatum in the rat
TLDR
Findings indicate that discrete areas of the amygdala, and in some cases individual amygdaloid neurons, can modulate information processing in the first two links of distinct cortico-striato-pallidal systems arising in the medial and lateral prefrontal cortex.
The cortical projection of the basolateral amygdaloid nucleus in the rat: A retrograde fluorescent dye study
TLDR
The fluorescent dye, retrograde labeling technique was used to determine the extent of the projection from the basolateral nucleus of the amygdala to the anterior half of the neocortex of the rat, demonstrating that the baslateral nucleus gives rise to a rather widespread and topographically organized projection.
Topographic organization of neurons in the acoustic thalamus that project to the amygdala
TLDR
The aim of the present studies was to determine which areas of the amygdala receive afferents from posterior thalamic structures that, in turn, receiveAfferents (presumably acoustic afferentials) from the inferior colliculus.
Organization of amygdaloid projections to the mediodorsal thalamus and prefrontal cortex: A fluorescence retrograde transport study in the rat
  • A. McDonald
  • Biology, Medicine
    The Journal of comparative neurology
  • 1987
TLDR
In this investigation rats received injections of different fluorescent retrograde tracers into MD and either the lateral, polar, or medial PFC in order to examine the relationship of amygdaloid neurons with cortical and/or thalamic projections.
Organization of projections from the basomedial nucleus of the amygdala: A PHAL study in the rat
TLDR
The organization of axonal projections from the basomedial nucleus of the amygdala (BMA) was examined with the Phaseolus vulgaris leucoagglutinin (PHAL) method in adult male rats to identify extra‐amygdalar projections divided into ascending and descending components.
Intrinsic GABAergic neurons in the rat central extended amygdala
TLDR
The data point to GABA‐ir neurons being a characteristic feature of the central extended amygdala and that GABA‐IR neurons participate in the long intrinsic connections linking the major components of this structure.
A description of the amygdaloid complex in the rat and cat with observations on intra‐amygdaloid axonal connections
The cytoarchitectonic structure and divisions of the amygdaloid complex are described in the rat and cat, with special reference to the axonal connections of each of the amygdaloid nuclei, and to
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