Abstract
The amygdala plays a key role in anxiety. Information from the environment reaches the amygdaloid basolateral nucleus and after its processing is relayed to the amygdaloid central nucleus where a proper anxiogenic response is implemented. Experimental evidence indicates that in this information transfer a GABAergic interface controls the trafficking of impulses between the two nuclei. Recent work indicates that interneuronal communication can take place by classical synaptic transmission (wiring transmission) and by volume transmission in which the neurotransmitter diffuses and flows through the extracellular space from its site of release and binds to extrasynaptic receptors at various distances from the source. Based on evidence from our laboratory the concept is introduced that neurotransmitters in the amygdala can modulate anxiety involving changes in fear learning and memories by effects on receptor mosaics in the fear circuits through wiring and volume transmission modes of communication.
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References
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Acknowledgements
This work was supported in part by grant IN200508 from Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México (UNAM) and by a grant from Swedish Research Council (04X-715).
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Special issue article in honor of Dr. Ricardo Tapia.
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Pérez de la Mora, M., Jacobsen, K.X., Crespo-Ramírez, M. et al. Wiring and Volume Transmission in Rat Amygdala. Implications for Fear and Anxiety. Neurochem Res 33, 1618–1633 (2008). https://doi.org/10.1007/s11064-008-9722-9
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DOI: https://doi.org/10.1007/s11064-008-9722-9