Abstract
The evolutionary approach to human anxiety is based on the defensive responses that nonhuman animals show to fear-provoking stimuli. Studies performed mostly on rodents have related areas such as the medial prefrontal cortex, amygdaloid and hypothalamic nuclei, hipoccampal formation, and midbrain central gray to these responses. It is clear, however, that animals show different and sometimes opposite responses according to the threatening stimulus. These responses include immediate reactions such as freezing or flight, behavioral inhibition or avoidance, which are organized by at least partially distinct brain systems. As discussed in this chapter, several pieces of evidence indicate that these brain systems are similar in rodents and primates. In addition, recent neuroimaging studies also suggest dysfunctions in these systems are probably related to anxiety disorders in humans.
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Abbreviations
- ACg:
-
Anterior cingulate
- AID:
-
Dorsal agranular insular cortex
- AIV:
-
Ventral agranular insular cortex
- BLA:
-
Basolateral amygdala
- BNST:
-
Bed nucleus of the stria terminalis
- CA1:
-
Ammon’s horn 1
- CeA:
-
Central nucleus of the amygdala
- DLPFC:
-
Lateral/dorsolateral prefrontal cortex
- DMH:
-
Dorsomedial hypothalamic nucleus
- HAP:
-
Hypothalamus–pituitary–adrenal
- IL:
-
Infralimbic cortex
- LH:
-
Lateral hypothalamus
- MO:
-
Medial orbital cortex
- mPFC:
-
Medial prefrontal cortex
- OCD:
-
Obsessive-compulsive disorder
- OMPFC:
-
Orbito-medial prefrontal cortex
- PAG:
-
Periaqueductal gray
- PFC:
-
Prefrontal cortex
- PL:
-
Prelimbic cortex
- PTSD:
-
Post-traumatic stress disorder
- PVN:
-
Paraventricular nucleus
- SSDR:
-
Species-specific defensive reaction
- VLO:
-
Ventral lateral orbital cortex
- vmPFC:
-
Ventromedial prefrontal cortex
- VO:
-
Ventral orbital cortex
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Acknowledgments
We thank the financial support from the Brazilian agencies Capes, FAPESP, CNPq and FAPESC.
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Canteras, N.S., Resstel, L.B., Bertoglio, L.J., de Pádua Carobrez, A., Guimarães, F.S. (2009). Neuroanatomy of Anxiety. In: Stein, M., Steckler, T. (eds) Behavioral Neurobiology of Anxiety and Its Treatment. Current Topics in Behavioral Neurosciences, vol 2. Springer, Berlin, Heidelberg. https://doi.org/10.1007/7854_2009_7
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