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. Author manuscript; available in PMC: 2012 Aug 15.
Published in final edited form as: J Neurosci Methods. 2011 May 11;199(2):199–207. doi: 10.1016/j.jneumeth.2011.05.004

Fig. 6.

Fig. 6

A schematic illustrating the frequent obstacle encountered when microinjectors are inserted into guide cannulas for acute experiments, and (b) the design of guide cannulas which avoid this problem.