Department of Physical Therapy For Musculoskeletal Disorders and its surgery, Faculty of Physical Therapy, Cairo University, Egypt.
Department of Physiotherapy, Family Medicine Unit, Health Affairs Directorate - 6th Of October (Ministry of health), Giza, Egypt.
J Musculoskelet Neuronal Interact. 2020 Sep 1;20(3):421-428.
This study investigated the effect of cervical flexor muscles fatigue on neck proprioception and postural stability.
Forty-five male and female subjects were evaluated pre, immediate after induction of fatigue, and after recovery. Isometric neck flexor muscle endurance test (NET) was used for the induction of cervical flexor muscle fatigue. Cervical proprioception was assessed by cervical joint position error test (JPET) via overhead laser pointer while postural stability was assessed by using (a) biodex balance system measuring "Overall stability index (OSI), Anterior/ posterior (A/P) index and medial/ lateral (M/L) index", (b) multidirectional reach test.
There was a significant decrease in cervical proprioception (cervical joint position error test) and postural stability (biodex balance system & multidirectional reach test) immediate post-induction of fatigue compared with both before induction of fatigue & after recovery from fatigue (p<0.001).
Subjects suffering from cervical muscles fatigue are vulnerable to have a significant effect on neck proprioception and postural instability as it impaired the cervical proprioception sense & postural stability. Therefore, our study provides information for the clinicians and patients to avoid overload fatigue of the cervical muscles because it affects overall postural balance, neck proprioception & righting reaction.
本研究旨在探讨颈屈肌疲劳对颈部本体感觉和姿势稳定性的影响。
45 名男性和女性受试者分别在疲劳诱导前、疲劳即刻后和恢复后进行评估。等长颈屈肌耐力测试（NET）用于诱导颈屈肌疲劳。通过头顶激光笔进行颈部关节位置误差测试（JPET）评估颈部本体感觉，通过生物动平衡系统测量（a）“整体稳定性指数（OSI）、前/后（A/P）指数和内/外（M/L）指数”和（b）多向伸展测试评估姿势稳定性。
与疲劳诱导前和疲劳恢复后相比，疲劳即刻后颈部本体感觉（颈部关节位置误差测试）和姿势稳定性（生物动平衡系统和多向伸展测试）显著下降（p<0.001）。
患有颈肌疲劳的受试者容易出现颈部本体感觉和姿势稳定性显著下降，因为它会损害颈部本体感觉和姿势稳定性。因此，我们的研究为临床医生和患者提供了信息，以避免颈肌过度疲劳，因为它会影响整体姿势平衡、颈部本体感觉和平衡反应。
