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. 2014 Mar 15;10(3):291–298. doi: 10.5664/jcsm.3532

Figure 1. BoNT-A injection sites.

Figure 1

The sites of BoNT-A injections in the masseter (A) and temporalis (B) muscles. BoNT-A was injected into 3 sites of masseter and/or temporalis muscles. (A) In the masseter muscle, the 3 injection sites formed a triangle 10 mm apart with a reference of the inferior, prominent part of the masseter muscle when the subject clenched the teeth. (B) In the temporalis muscle, the 3 injection sites were arranged posteriorly, in parallel to eyebrow, from the site at the prominent part of the anterior temporalis muscle when the subject clenched the teeth.