Affiliations: [a] Department of Physical Medicine and Rehabilitation, Dokuz Eylul University, Izmir, Turkey | [b] Department of Radiodiagnostic, Dokuz Eylul University, Izmir, Turkey
Correspondence:
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Corresponding author: Banu Dilek, Department of Physical Medicine and Rehabilitation, Dokuz Eylul University, Izmir, Turkey. Tel.: +90 0505 224 83 40; Fax: +90 0232 279 24 62; E-mail:banu.dilek@deu.edu.tr
Abstract: BACKGROUND: Recently, proprioception deficits of the rotator cuff
and the deltoid muscles have been suggested to play a pivotal role in the
subacromial impingement syndrome (SIS). To date, there are no study has been
found where the kinesthesia and joint position senses have been evaluated
together in SIS. OBJECTIVE: To investigate the shoulder proprioception in patients with SIS. METHODS: Sixty-one patients with SIS and 30 healthy controls, aging between 25 and 65
years, were included in the study. Main outcome measure was proprioception,
assessed with an isokinetic dynamometer. Kinesthesia, active and passive
joint repositioning senses were tested at 0° and 10° external
rotation. All tests were repeated 4 times and the mean of angular errors
were obtained. RESULTS: The mean age was 49.14 ± 10.27 and 48.80 ± 11.09 years in patient
group and in control group respectively. No significant difference was found
between two groups in terms of age, gender and dominance. When involved and
uninvolved shoulders of the patient group were compared, kinesthesia, active
and passive joint position senses were significantly impaired in involved
shoulders at all angles (P < 0.05). When involved shoulders of the patient
group were compared to the control group, kinesthesia, active and passive
joint position senses were significantly impaired in involved shoulders in
patient group at all angles (P < 0.05) except active position sense at
0°. When uninvolved shoulders of the patient group were compared to the
control group, kinesthesia at 10° was significantly impaired (P
< 0.05). CONCLUSION: This study showed that shoulder proprioception was impaired in patients with
SIS. This proprioceptive impairment was found not only in involved shoulders
but also in uninvolved shoulders in patients with SIS.
Keywords: Shoulder, proprioception, kinesthesia, position sense, subacromial impingement syndrome
