Figure 5 | Scientific Reports

Figure 5

From: Sex-related differences in response to masseteric injections of glutamate and nerve growth factor in healthy human participants

Figure 5

Graphs illustrating the correlations between the level of sensitization and frequency of nerve fibers co-expressing substance P and NMDA-receptor2B within connective tissue. The correlation between the percentage change of pressure pain threshold (PPT), chewing pain and temporal summation pain (from baseline to 5 min after glutamate injection) and the frequency of nerve-fibers co-expressing substance P and NMDA-receptor2B on day 0 in 15 healthy women and 15 age-matched men. (A,B) PPT in women and men, respectively. (C,D) Chewing pain (functional test) in women and men, respectively. (E,F) temporal summation pain in women and men, respectively.

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