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Knee joint effusion and proprioception

P J McNair1, R N Marshall, K Maguire

  • 1Faculty of Health Studies, Auckland Institute of Technology, New Zealand.

Archives of Physical Medicine and Rehabilitation
|June 1, 1995
PubMed
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Excessive knee joint fluid did not significantly impact proprioception in healthy subjects. This suggests long-term effusions, not acute fluid, may cause proprioceptive deficits in clinical settings.

Area of Science:

  • Biomedical Engineering
  • Kinesiology
  • Neuroscience

Background:

  • Proprioception, the sense of body position, is crucial for joint stability.
  • Knee joint effusions are common in various musculoskeletal conditions.
  • The impact of acute joint fluid on proprioception remains unclear.

Purpose of the Study:

  • To investigate the acute effects of experimentally induced knee joint effusion on proprioceptive accuracy.
  • To determine if increased intra-articular fluid volume directly impairs joint position sense.

Main Methods:

  • Twenty healthy participants performed a limb-tracking task under blindfolded conditions.
  • Experimental group received a 90 mL intra-articular saline-dextrose injection.
  • Proprioceptive error was measured using an electrogoniometer before and after injection/rest.

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Main Results:

  • Acute knee joint effusion did not significantly alter proprioceptive tracking error (p > 0.05).
  • Control group also showed no significant change in tracking error (p > 0.05).
  • No immediate deficit in proprioception was observed following fluid injection.

Conclusions:

  • Acute, moderate increases in knee joint fluid volume do not acutely impair proprioception in healthy individuals.
  • Chronic effusions and the inflammatory nature of joint fluid may be more critical factors in clinical proprioceptive loss.
  • Further research should explore the effects of inflammatory mediators and long-term joint distension.