Subjects diagnosed as myogenic TMD according to the presence of trigger points in masseter, temporalis, upper trapezius and C5-C6 articular pillars Subjects are heavy smartphones users, using the SAS-SV, the cuffof value for males is 31 and for females is 33.

Subjects have forward head posture assessed by CVA <49.9 degrees

Subjects are heavy smartphones users, using the SAS-SV, the cuffof value for males is 31 and for females is 33.

Subjects have forward head posture assessed by CVA <49.9 degrees

All subjects will be assessed for FHP by taking a lateral view picture to calculate the CVA using the Kinovea software. Each subject with FHP will be examined for myofascial trigger points done by the therapist finger to palpate bilaterally on tender nodules in masticatory and neck muscles. Then using a pressure algometer, the PPT value will be scored for each trigger in each muscle bilaterally. Masticatory muscle endurance will be measured by asking the subject to bite on load sensor for as long as the subject can until exhaustion. Using a stopwatch, the time will be recorded in seconds. Using the craniocervical extension endurance test, the subject will lie prone with their head unsupported and with a bubble inclinometer attached to their head. Using a stopwatch, time in seconds will be recorded to test how long the subject can sustain the neck in neutral position. Finally, a smartphone addiction scale will be answered by the subject to identify how much they are addicted to its use.

For the masticatory muscles, the subject will be sitting and the therapist will place the pressure algometer on the belly of the masseter and temporalis muscles. A gradual pressure will be applied until the subject experiences pain. The value displayed on the device will be recorded. This will be repeated 3 times on each side. For the upper trapezius muscles, subject will be seated. Using the algometer, a pressure will be applied on midpoint of the trapezius. Then subject will lie prone, to apply pressure by the algometer on a point 1 cm laterally to the midpoint between C6 and C5 spinous processes. A value will be recorded when subject feels pain. This will be repeated 3 times on each side.

To assess masticatory muscles, subject will sit in an upright position and will bite on the first molar at maximum voluntary contraction until exhaustion on an I load mini bite load cell. Using a stopwatch, time in seconds will be recorded for both sides. long maintenance time means good endurance.Test will be terminated when any pain or discomfort is felt in the masticatory muscles.Craniocervical extension endurance test will assess neck extensors endurance. Subject will lie prone on a plinth with the head and neck unsupported and a bubble inclinometer will be fixed on the head using a strap. Subject will be asked to sustain a neutral position for as long as possible and time in seconds will be recorded. The test will be terminated if pain is felt in the neck or if the head failed to maintain its neutral position or if it moved more than 5 degrees shown by inclinometer.