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The effect of elbow position on biceps tendon reflex
Isik Keles1, Balci Nilufer, Beyazova Mehmet
1Department of Physical Medicine and Rehabilitation, Kirikkale [corrected] University, Faculty of Medicine, Kirikkale [corrected] Turkey. ikeles@ttnet.net.tr.
Neurology India
|October 9, 2004
Summary
Elbow position significantly impacts biceps tendon reflex (T reflex) measurements. Optimal reflex amplitude occurred at 90 degrees, while shorter onset latency was observed at 120 degrees, highlighting the need to standardize extremity positioning for accurate neurological assessments.
Area of Science:
- Neurology
- Clinical Neurophysiology
Background:
- Tendon reflex (T reflex) testing is fundamental in clinical neurology diagnostics.
- Precise measurement and quantification of T reflexes can enhance clinical examination accuracy.
Purpose of the Study:
- To investigate the influence of different elbow positions on the biceps T reflex.
Main Methods:
- A self-controlled clinical trial involving 25 healthy volunteers.
- Biceps T reflex was measured using an electronic reflex hammer at elbow angles of 90, 120, and 150 degrees.
- Statistical analysis included repeated-measures ANOVA and Pearson correlation.
Main Results:
- Onset latency was significantly shorter at a 120-degree elbow position.
- Maximum reflex amplitude was achieved at a 90-degree elbow position.
- Reflex onset latency correlated with height and arm length but not age.
Conclusions:
- Electrophysiological measurement of T reflexes offers objective quantification.
- Standardizing extremity positioning is crucial for reliable T reflex study results.