THE INFLUENCE OF THE SMARTPHONES ON THE DEVELOPMENT OF POSTURE AND MUSCLE DISORDERS IN THE HEAD AND NECK AREA BY CHILDREN AND YOUTH. International Journal of Innovative Technologies in Social Science, [S. l.], v. 2, n. 1(49), 2026. DOI: 10.31435/ijitss.1(49).2026.4352. Disponível em: https://rspublisher.org/index.php/ijitss/article/view/4352. Acesso em: 17 mar. 2026.