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. Author manuscript; available in PMC: 2012 Nov 2.
Published in final edited form as: J Neurosci. 2010 Oct 6;30(40):13246–13253. doi: 10.1523/JNEUROSCI.1130-10.2010

Figure 5. Spectrum complexity and sound onset parameters of induced sound production in four experimental preparations.

Figure 5

A, B, Both pressure (A) and flow (B) at the onset of sound production do not differ significantly across experimental preparations. C, Two-tailed paired t tests show that the HNR is significantly decreased in the excised preparation (P4) compared with in situ (P1, *p < 0.05) and to the 24 – 48 h denervated syrinx (P3, **p < 0.01), which means that the amount of spectrum complexity increases significantly in the excised syrinx. N = 6, except for P4, where N = 4. Preparation P1, in situ phonation; preparation P2, in situ phonation after lesion of the bilateral tracheosyringeal branches of the hypoglossal nerve; preparation P3, in situ phonation 24 – 48 h after lesion; and preparation P4, excised in vitro preparation.