AbstractAimsNeck pain is frequent and many develop on-going neck pain after the initial onset. Studies on clinical neck pain suggested that altered axioscapular muscle activity may be an important factor in on-going neck pain. This study investigates the effect of bilateral experimental neck pain on axioscapular muscle activity during standardised resisted arm movements.Methods25 healthy participants were recruited for this single blinded cross-over study. Experimental pain was induced by bilateral injection of hypertonic saline into the splenius capitis muscle. Isotonic saline was used as a control. Pain intensity was recorded using an electronic visual analogue scale (VAS; 0-10 cm). Participants performed standardised arm movements, from a seated position, while wearing 1 kg wrist weights. Six arm abduction movements (30° to frontal plane, 3 per side) were performed to an angle of 140°. Each movement consisted of two 3 s phases (up/down) and was separated by a 6 s break, before moving the opposite arm. Surface electromyography (EMG) was recoded from 8 bilateral muscles. Recordings were done before, immediately after, and 5 min after the experimental pain. Root-mean-square (RMS) of the EMG signals were extracted for each muscle and averaged for the 3 trials. Data was compared between sides and no differences were identified after which data was pooled for further analysis.ResultsDuring the painful condition for the slow upward movement, a reduced RMS-EMG activity was found for the ipsilateral upper trapezius (P< 0.01). In addition, increased RMS-EMG was found bilaterally for the erector spinae muscle (P< 0.01).ConclusionBilateral experimental neck reorganise axioscapular and trunk muscle activity during resisted, slow upward movement. The results of this supports previous studies on neck pain patients suggesting neck pain is linked to axioscapular function and underpins the necessity to include the shoulder girdle in assessment and rehabilitation of neck pain patients.
Scandinavian Journal of Pain – de Gruyter
Published: Jul 1, 2016
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera