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. Author manuscript; available in PMC: 2012 Oct 1.
Published in final edited form as: Neurobiol Aging. 2009 Dec 16;32(10):1915–1922. doi: 10.1016/j.neurobiolaging.2009.11.014

Figure 1.

Figure 1

Schematic of training paradigms. A) Illustration of mouse head with the periorbital shock unconditioned stimulus (US; lightening bolt) and two conditioned stimuli, stimulation of C row whiskers (WCS; black whiskers) and auditory tone (ACS; speaker) delineated. B) Illustration of the training regimes for the three age groups. C) Illustration of the two training paradigms used. Left - Trace; Right - Delay