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Article: Distinguishing characteristics of serotonin and non-serotonin-containing cells in the dorsal raphe nucleus: electrophysiological and immunohistochemical studies.

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Kirby LG; Pernar L; Valentino RJ; Beck SG
Neuroscience, 2003

Table 2Pharmacological responses of 5-HT-containing and non-5-HT-containing cells in the rat DRN
Silent cells
5-CT elicited hyperpolarization (mV)8.1±1.6 (14)8.7±1.8 (15)
PE elicited depolarization (mV)9.0±2.1 (5)9.3±1.9 (7)
PE elicited firing rate (Hz)0.4±0.2 (5)0.2±0.1 (7)
5-CT elicited hyperpolarization of PE-stimulated cells (mV)11.7±3.8 (3)8.4±2.0 (5)
5-CT effect on PE-stimulated firing rate: % changeall cells silenced: −100%±0.0 (3)all cells silenced: −100%±0.0 (3)
Spontaneously active cells
5-CT elicited hyperpolarization (mV)11.0±1.4 (3)1.4±1.1** (5)
5-CT effect on firing rate: % changeall cells silenced: −100%±0.0 (3)no cells silenced: −36.0±17.5* (5)
Values indicate mean±S.E.M. The group size is indicated within parentheses. Asterisks indicate a significant difference between groups by unpaired Student’s t-test (P<0.05*; P<0.001**). These distinguishing characteristics are further highlighted by bold print.

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