The density of spines has been calculated over the processes of NADPH diaphorase reactive neurons in the medial prefrontal cortex (mPFC) of the rat. Quantitative data indicate that diaphorase reactive dendrites ranged from being virtually aspiny to possessing moderate numbers of spines (0.66 +/- 0.23 spines/microns; mean +/- S.D.). The size and shape of dendritic spines varied from long thin 'drum sticks' (the most frequent type) to short stubby protrusions.

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http://dx.doi.org/10.1016/0006-8993(95)01012-kDOI Listing

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