Psychological Stress Induces Temporary Masticatory Muscle Mechanical Sensitivity in Rats

Figure 2

Photograph illustrating the method for assessing mechanical nociceptive thresholds in the rat. The experimenter’s hand provided a comfortable “rest” for the rat. Then a von Frey monofilament was probed against the orofacial region. Note that the rat was unrestrained and stayed in one position. The arrows indicate where the tip of the monofilament was probing against the rat’s skin.