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. Author manuscript; available in PMC: 2011 Mar 18.
Published in final edited form as: Front Biosci (Schol Ed). 2011 Jan 1;3:298–330. doi: 10.2741/s153

Figure 6.

Figure 6

Relationship between CSF homovanillic acid (pmol/ml) and N400 semantic priming effect (μV) for unmedicated schizophrenia patients (n=18). N400 semantic priming effect reflects the difference between the mean area integration of N400 amplitudes (μV) recorded for semantically unrelated and related words over the 270 to 550 ms range at anterior midline scalp (Fz) [N400-unrelated words minus N400-related words]. Negativity is upward. Greater negativity in this difference measure reflects more typical (or normal) N400 semantic priming response. Abbreviation: ln, natural log.