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Figure 6: Pain referral from head, face, and neck muscles. Row 1: Left: V1, V2, and V3. Right: Frontalis, trapezius, splenius cervicis, temporalis, trapezius masseter, and sternomastoid refer pain to V1. Row 2: Left: Masseter, temporalis, pterygoids, orbicularis oculi, zygomaticus, and sternomastoid refer pain to V2. Right: Sternomastoid, masseter, temporalis, pterygoids, trapezius, digastric, and platysma refer pain to V3. (Image courtesy Dr Mary Abraham MD based on reference 10)

Figure 6: Pain referral from head, face, and neck muscles. Row 1: Left: V1, V2, and V3. Right: Frontalis, trapezius, splenius cervicis, temporalis, trapezius masseter, and sternomastoid refer pain to V1. Row 2: Left: Masseter, temporalis, pterygoids, orbicularis oculi, zygomaticus, and sternomastoid refer pain to V2. Right: Sternomastoid, masseter, temporalis, pterygoids, trapezius, digastric, and platysma refer pain to V3. (Image courtesy Dr Mary Abraham MD based on reference 10)