Imperial College London

Dr Shin-Yi Chiou (Chloe)

Faculty of MedicineDepartment of Surgery & Cancer

Honorary Research Associate



+44 (0)20 3313 8833s.chiou12




7L16Lab BlockCharing Cross Campus






BibTex format

author = {Chiou, SY and Jeevathol, A and Odedra, A and Strutton, PH},
doi = {10.1002/ejp.684},
journal = {European Journal of Pain},
pages = {1506--1515},
title = {Voluntary activation of trunk extensors appears normal in young adults who have recovered from low back pain},
url = {},
volume = {19},
year = {2015}

RIS format (EndNote, RefMan)

AB - BackgroundLow back pain (LBP) is associated with alterations in control of trunk movements and changes within central nervous system (CNS). Evidence shows that some of these alterations within the CNS are reversible when the symptoms are relieved, whereas other shows the opposite. Therefore, the purpose of the current study was to investigate whether alterations in voluntary activation (VA) of central neural drive, as assessed using twitch interpolation to measure VA, are present in subjects with a history of low back pain (HLBP), who are free from pain at the time of experiment.MethodsTwelve adults with HLBP and 12 controls participated. Bilateral electromyographic recordings were obtained from erector spiane muscles at two vertebral levels (T12 and L4) and from rectus abdominis. Participants performed a series of brief isometric back extensions (50–100% maximum voluntary contraction) during which transcranial magnetic stimulation was delivered. The sizes of the evoked (superimposed) twitches were measured using dynamometry and VA was derived. The amplitude of motor evoked potentials (MEPs) and duration of cortical silent period (CSP) in erector spinae muscles were calculated; questionnaires were used to evaluate disability, levels of physical activity, quality of life and pain.ResultsThe level of VA was not significantly different between HLBP and control groups. Additionally, there were no betweengroup differences in the timetopeak amplitudes of the twitches, MEP amplitudes or duration of CSP.ConclusionsThe ability to voluntarily activate back extensor muscles maximally does not appear to be impaired in subjects with a history of LBP during painfree episodes.
AU - Chiou,SY
AU - Jeevathol,A
AU - Odedra,A
AU - Strutton,PH
DO - 10.1002/ejp.684
EP - 1515
PY - 2015///
SN - 1090-3801
SP - 1506
TI - Voluntary activation of trunk extensors appears normal in young adults who have recovered from low back pain
T2 - European Journal of Pain
UR -
UR -
UR -
UR -
VL - 19
ER -