alterations in the length of the muscles and connective tissues of the head and neck, which may result from poor alignment, precipitate many of the clinical symptoms associated with mandible position and temporomandibular joint dysfunction.22 Head and neck position may influence the tension in the area muscles, which in turn may affect the biomechanics and function of the mandible.16 It has been established that forward head position and the alignment of the upper quarter contribute to TMD.17,18 Forward head posture is often associated with changes in proximal musculoskeletal structures comprising of the cervical erector spinae, upper trapezi, levator scapulae, and anterior vertebral neck flexors and associated joints.17,19 Muscles and soft tissue imbalances may affect the alignment and biomechanics of the upper quadrant structure causing hyperextension of the upper cervical spine, flattening of the lower cervical spine, elevation and forward protraction of the shoulders, and excessive thoracic kyphosis.17 Forward head and cervical hyperlordosis cause the tempromandibular joint to become malaligned affecting occulsion.20,21 These postural changes affect mandibular position, condyle position and masticatory musculature activity, thus, contributing to craniomandibular dysfunction.