title: Emotional enhancement of memory: how norepinephrine enables synaptic plasticity.
abstract: Changes in synaptic strength are believed to underlie learning and memory. We explore the idea that norepinephrine is an essential modulator of memory through its ability to regulate synaptic mechanisms. Emotional arousal leads to activation of the locus coeruleus with the subsequent release of norepineprine in the brain, resulting in the enhancement of memory. Norepinephrine activates both pre- and post-synaptic adrenergic receptors at central synapses with different functional outcomes, depending on the expression pattern of these receptors in specific neural circuitries underlying distinct behavioral processes. We review the evidence for noradrenergic modulation of synaptic plasticity with consideration of how this may contribute to the mechanisms of learning and memory.
authors.affiliation: Department of Psychiatry, McLean Hospital, Harvard Medical School, 115 Mill Street, Belmont, Massachusetts 02478, USA. ktully@mclean.harvard.edu
authors.forename: Keith
authors.initials: K
authors.lastname: Tully
authors.forename: Vadim Y
authors.initials: VY
authors.lastname: Bolshakov
mesh_terms: D000818:Animals; D004644:Emotions / Q000502:physiology*; D006624:Hippocampus / Q000502:physiology; D007858:Learning / Q000502:physiology; D008568:Memory / Q000502:physiology*; D009473:Neuronal Plasticity / Q000502:physiology*; D009638:Norepinephrine / Q000378:metabolism*; D015290:Second Messenger Systems / Q000502:physiology; D009435:Synaptic Transmission / Q000502:physiology; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
chemical_list: D005680:gamma-Aminobutyric Acid; D009638:Norepinephrine
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