Evidence of altered kinesthesia about the knee following increased skin temperature

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Lamers, Meghan
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University of Guelph

Introduction: Skin information does contribute to knee joint position sense (Collins et al., 2005; Edin, 2001). It remains unclear if increased skin temperature can affect dynamic joint position sense (DJPS) about the knee. Purpose: To determine how increased skin temperature can affect knee DJPS. Method: Participants (n=11; F= 6) were seated in a HUMAC NORM dynamometer (CSMi Medical Solutions, Stoughton, MA). Participants pressed a trigger when they perceived their left knee reached a 90o angle. Five extension and five flexion trials were performed at baseline (28.74 ± 2.43 oC). Skin temperature was increased (38.05 ± 0.16 oC) and the protocol was repeated. Directional error (DE), absolute error (AE) and precision absolute error (PAE) were calculated. Results: Increasing knee-skin temperature improved extension AE (p= 0.032). Discussion: Information from muscle spindles may be preferentially weighted over information from cutaneous afferents during knee extension. Conclusion: Increased knee-skin temperature improves DJPS during knee extension.

proprioception, kinaesthesia, dynamic joint position sense, joint position sense, DJPS, JPS, heat, temperature, lower limb, knee, skin, cutaneous receptors, muscle spindles, absolute error, directional error, EMLA, 90 degrees