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Acetylcholinesterase (AChE) fiber density was investigated between the 4th and 5th cortical layers of the somatosensory cortex (SSC). From each animal 6 sections from Bregma 0.49 mm to Bregma −1.23 mm, with 120 μm inter-sectional distance were selected and analyzed for AChE fiber density. Images were created with the help of [52].
