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. Author manuscript; available in PMC: 2009 Jan 1.
Published in final edited form as: Brain Res Rev. 2007 Jul 31;57(1):118–124. doi: 10.1016/j.brainresrev.2007.07.008

Figure 2.

Figure 2

ENG recordings from the biarticular knee-extensor, the hip-flexor, and the hip-extensor motor nerves during fictive rostral scratch in the turtle. A: Normal rostral scratch with rhythmic alternation between hip-flexor activity and quiescence. Hip-extensor activity occurs during hip-flexor quiescence. Knee-extensor activity occurs during the latter portion of hip-flexor activity. B: One cycle of a hip-extensor deletion with the end of the cycle marked with filled diamond. At the filled diamond, there is no hip-extensor activity, and no quiescent period between the end of the hip-flexor burst and the start of the next hip-flexor burst. The other cycles in B are examples of normal rostral scratch. From Stein and Daniels-McQueen, J Neuroscience 22: 6800-6809, 2002; used with permission of and copyright 2002 by the Society for Neuroscience.