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. Author manuscript; available in PMC: 2012 Apr 1.
Published in final edited form as: Trends Mol Med. 2011 Feb 23;17(4):197–206. doi: 10.1016/j.molmed.2010.12.005

Figure 3.

Figure 3

Strategies to deliver light to transduced neurons in vivo. (a) A guide cannula is stereotaxically implanted above a target region for subsequent placement of an optic fiber. The fiber is attached to a laser diode, which might be attached to a computer or pulse generator for automatic stimulation protocols. (b) An optical window is stereotaxically implanted above a target region. A light-emitting diode (LED) is placed above the window to illuminate surface neurons and is connected to a computer for automatic stimulation protocols.