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• W2093889074 abstract "Typically, stimulus batteries used to characterize sensory neural coding span physical parameter spaces (e.g., concentration: from low to high). For awake animals, however, psychological variables (e.g., pleasantness/palatability) with complicated relationships to the physical often dominate neural responses. Here we pit physical and psychological axes against one another, presenting awake rats with a stimulus set including 4 NaCl concentrations (0.01, 0.1, 0.3, and 1.0 m) plus palatable (0.3 m sucrose) and aversive (0.001 m quinine) benchmarks, while recording the activity of neurons in two sites vital for NaCl taste processing, gustatory cortex (GC) and central amygdala (CeA). Since NaCl palatability (i.e., preference) follows a non-monotonic, “inverted-U-shaped” curve while concentration increases monotonically, this stimulus battery allowed us to test whether GC and CeA responses better reflect external or internal variables. As predicted, GC single-neuron and population responses reflected both parameters in separate response epochs: sodium concentration-related information appeared with the earliest taste-specific responses, giving way to palatability-related information, in an overlapping subset of neurons, several hundred milliseconds later. CeA single-neuron and population responses, meanwhile, contained only a brief period of concentration specificity, occurring just before palatability-related information emerged (simultaneously with, or slightly later than, in GC). Thus, cortex and amygdala both prominently reflect NaCl palatability late in their responses; CeA neurons largely respond to either palatable or aversive stimuli, while GC responses tend to reflect the entire palatability spectrum in a graded fashion." @default.
• W2093889074 created "2016-06-24" @default.
• W2093889074 creator A5002597607 @default.
• W2093889074 creator A5004175568 @default.
• W2093889074 creator A5025986648 @default.
• W2093889074 date "2012-07-18" @default.
• W2093889074 modified "2023-10-13" @default.
• W2093889074 title "Sodium Concentration Coding Gives Way to Evaluative Coding in Cortex and Amygdala" @default.
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• W2093889074 doi "https://doi.org/10.1523/jneurosci.6059-11.2012" @default.
• W2093889074 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3432403" @default.
• W2093889074 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22815514" @default.
• W2093889074 hasPublicationYear "2012" @default.
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