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Children with chronic stress-induced recurrent muscle pain have enhanced startle reaction.
Karolinska institutet.
Karolinska institutet.
Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap, Laboratoriet för biomekanik och motorisk kontroll (BMC). Karolinska institutet.ORCID-id: 0000-0001-9040-2158
2017 (Engelska)Ingår i: European Journal of Pain, ISSN 1090-3801, E-ISSN 1532-2149, Vol. 21, nr 9, s. 1561-1570Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

BACKGROUND: Children with recurrent pain of negative chronic stress origin from different locations have a characteristic pattern of tender points in the temporal, trapezoid, great pectoral and abdominal muscles. We tested the hypothesis that the startle reaction is activated in these children and that some of the startle-activated muscles are related to the tender point pattern and the recurrent pain.

METHODS: In children/adolescents, aged 10-17 years, 19 with recurrent psychosomatic pain (PAIN) and 23 controls (CON) we measured and analysed resting activity and acoustic startle response with electromyography (EMG) for the muscles involved in the pattern of tender points and also the lumbar erector spinae.

RESULTS: The PAIN group showed higher resting activity and higher acoustic startle response values than the CON group for all six muscles together regarding the mean amplitude in the initial 200 ms, and during the burst of activity, and longer burst duration and shorter burst latency. For PAIN versus CON, all separate muscles showed generally higher values of EMG amplitudes and burst durations, and shorter latencies for the burst onset in all measures; with significance or strong trends for several parameters and muscles.

CONCLUSION: For the first time in children with recurrent psychosomatic pain, increased resting activity and potentiated startle response were demonstrated in the muscles involved in the stress tender point pattern.

SIGNIFICANCE: This study demonstrates in adolescents how recurrent pain of negative stress origin from the head, stomach, back and chest is related to increased startle reaction and increased muscular tension in these regions. This study contributes to the understanding of the mechanisms underlying the global burden of recurrent pain.

Ort, förlag, år, upplaga, sidor
2017. Vol. 21, nr 9, s. 1561-1570
Nationell ämneskategori
Fysiologi
Forskningsämne
Medicin/Teknik
Identifikatorer
URN: urn:nbn:se:gih:diva-4897DOI: 10.1002/ejp.1057ISI: 000409866500010PubMedID: 28474495OAI: oai:DiVA.org:gih-4897DiVA, id: diva2:1094632
Tillgänglig från: 2017-05-10 Skapad: 2017-05-10 Senast uppdaterad: 2018-01-13Bibliografiskt granskad

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Andersson, Eva
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Laboratoriet för biomekanik och motorisk kontroll (BMC)
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European Journal of Pain
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