Ha Sun-Young, Sung Yun-Hee
Department of Physical Therapy, Graduate School, Kyungnam University, Changwon, Korea.
Department of Physical Therapy, College of Health Sciences, Kyungnam University, Changwon, Korea.
J Exerc Rehabil. 2020 Apr 28;16(2):168-174. doi: 10.12965/jer.2040106.053. eCollection 2020 Apr.
Increased use of smartphones can cause abnormal alignment of head and neck, resulting in forward head posture (FHP). This can lead to change in the structures and function of the cervical vertebrae. The purpose of this study was to determine the impact on deep neck flexor muscles, proprioception, vestibular function, and balance of subjects with induced FHP by using smartphone. Twenty-two healthy persons were randomly divided into two groups. The FHP group maintained a craniovertebral angle (CVA) of <49° and a normal head posture group maintained a CVA of >50° watching the smartphone for 40 min. We measured the area of the longus colli and longus capitis muscles, cervical joint position sense, Romberg test, subjective visual vertical test, and subjective visual horizontal test. There was no significant difference in the deep neck flexor muscles, vestibular function, and static balance between the groups. However, there was a significant difference in the cervical proprioception (<0.05). Proprioception may be considered to be the most influential factor in induced FHP by smartphone viewing.
智能手机使用频率的增加会导致头颈部异常对齐，从而导致头部前倾姿势（FHP）。这会导致颈椎结构和功能的改变。本研究的目的是通过使用智能手机来确定对诱发FHP的受试者的颈深屈肌、本体感觉、前庭功能和平衡的影响。22名健康人被随机分为两组。FHP组在观看智能手机40分钟时保持颅椎角（CVA）<49°，正常头部姿势组保持CVA>50°。我们测量了颈长肌和头长肌的面积、颈椎关节位置觉、罗姆伯格试验、主观视觉垂直试验和主观视觉水平试验。两组之间在颈深屈肌、前庭功能和静态平衡方面没有显著差异。然而，颈椎本体感觉存在显著差异（<0.05）。本体感觉可能被认为是观看智能手机诱发FHP的最有影响因素。
