EMG Activity, Muscle Tone, Elasticity and Stiffness of the Upper Trapezius Before, During and After Dry Needling
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 24
- 主要终点
- Changes in surface resting EMG activity of the upper trapezius after dry needling as assessed by the EMG DTS device
研究概览
简要总结
An experimental study will be conducted to evaluate the effect of a single dry needling session on surface EMG activity (primary outcome measure), muscle tone, elasticity, stiffness and pain (secondary outcome measures) of the upper trapezius, in female office workers with trapezius myalgia.
详细描述
Neck-shoulder pain is a frequent problem in office workers . These complaints are often related to myofascial problems of neck and shoulder muscles in which the upper trapezius is frequently involved. Trapezius myalgia (TM) is characterized by pain, palpable stiffness and tenderness of the upper part of the trapezius muscle. Several studies show that myofascial trigger points (MTrP) have an important role in the development and maintenance of myofascial pain.
Trigger points are defined as hyperirritable nodules in a contracture of skeletal muscle fibers.
The pathophysiology of MTrPs is still unclear but several hypothesis exist. The most plausible explanation is that, due to sustained postures or repetitive low-level tasks, a sustained irritation of motor end plates with an excessive release of acetylcholine arises. This may lead to a persistent sarcomere contraction, leading to an impaired blood circulation, a reduced oxygenation and energy depletion, sensitizing nociceptors and causing pain.
Dry needling (DN) is a myofascial treatment technique, in which a thin, solid filiform needle is inserted directly into the MTrP. During dry needling, local twitch responses (LTR) can be elicited. These are involuntary contractions of muscle fibers, leading to muscle relaxation, an increase in blood flow, recovery of the muscle metabolism and thus a reduction of pain and stiffness.
In this experimental study, 25 female office workers with trapezius myalgia are recruited from several work places with predominantly computer based tasks. These subjects have to perform at least 20 hours a week of computer work and this since at least one year. Subjects are included based on online questionnaires, a clinical examination of neck an shoulder and the presence of MTRP 2 in the upper trapezius. All participants will receive information and have to sign an informed consent form.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Single Group
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 25 Years 至 55 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Performing office work since at least one year
- •Performing computer based tasks for at least 20 hours a week
- •NRS > or equal to 3/10
- •Clinical diagnosis of trapezius myalgia
- •Trapezius myalgia is work-related and thus aggravates during working day/week
- •Presence of MTrP2 in the upper trapezius muscle (bilaterally)
排除标准
- •Being in treatment during the study
- •Traumatic injuries/surgery to neck and upper limb region
- •Signs of cervical nerve root impingement
- •Whiplash injury
- •Cardiovascular, neurological, life threatening, systemic and metabolic diseases
- •Diagnosis of fibromyalgia/chronic fatigue syndrome
- •Shoulder pathology
- •Coagulation disorders
- •Pregnancy
结局指标
主要结局
Changes in surface resting EMG activity of the upper trapezius after dry needling as assessed by the EMG DTS device
时间窗: Immediately after a typing task of 20 minutes, one minute after dry needling, 10 minutes after dry needling
Device: Noraxon USA Desktop Direct Transmission System (DTS) for EMG Changes in resting EMG activity of the upper trapezius immediately after dry needling and 10 minutes after dry needling, compared to resting EMG activity after a typing task, will be measured by using surface electrodes placed bilaterally at the MTrP 2 location of the upper trapezius (halfway between C7 and the posterolateral edge of the acromion). The change in EMG activity after dry needling will be compared with the change in EMG activity after rest. Resting EMG activity will be expressed as a percentage of submaximal reference contractions of the upper trapezius (% reference contractions).
次要结局
- Changes in surface resting EMG activity of the upper trapezius after rest as assessed by the EMG DTS device(Immediately after a typing task of 20 minutes, immediately after a resting pause of 10 minutes)
- Changes in muscle tone, stiffness and elasticity of the upper trapezius after dry needling as assessed by the MyotonPRO ®(Immediately after a typing task of 20 minutes, one minute after dry needling, 10 minutes after dry needling)
- Changes in muscle tone, stiffness and elasticity of the upper trapezius after rest as assessed by the MyotonPRO ®(Immediately after a typing task of 20 minutes, immediately after 10 minutes of rest)
- Changes in muscle tone, stiffness and elasticity of the upper trapezius after a typing task, compared to baseline, as assessed by the MyotonPRO ®(Before and immediately after a typing task of 20 minutes)
- Changes in pain score after a typing task of 20 minutes as assessed by the numeric rating scale(Immediately before and after a typing task of 20 minutes)
- Changes in surface resting EMG activity of the upper trapezius during a fatiguing typing task of 20 minutes as assessed by the EMG DTS device(During the typing task, every five minutes EMG activity will be measured for 30 seconds)
- Differences in active muscle tension of the upper trapezius (ratio between resting EMG activity in upright and lying position) between the (dominant) painful and heterolateral side, as assessed by the EMG DTS device(At baseline)
- Changes in pain score after rest as assessed by the numeric rating scale(Immediately after a typing task of 20 minutes, immediately after 10 minutes of rest)
- Differences in muscle fatigue of the upper trapezius (ratio between resting EMG activity before and after a typing task of 20 minutes) between the (dominant) painful and heterolateral side, as assessed by the EMG DTS device(Before and after a typing task of 20 minutes)
- Differences in muscle tone, stiffness and elasticity of the upper trapezius between the (dominant) painful and heterolateral side, as assessed by the MyotonPRO ®(At baseline)
- Changes in pain score after dry needling as assessed by the numeric rating scale(Immediately after a typing task of 20 minutes, one minute after dry needling, 10 minutes after dry needling)
- Differences in pain score at baseline between the (dominant) painful side and heterolateral side(At baseline)