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Recovery of spine density 90 days after MPTP. (A) Representative images of Golgi stained MSN dendrites (arrowheads) 90 days after the last MPTP injection. Scale bars 10 μm. (B) Number of spines in a 10 µm stretch of dendrite. Each marker represents one MSN. Numbers of MSN are in Table 1. p value is from Mann–Whitney test.
