Background:Falls are the leading causes of unintentional injuries in the elderly and thus a pose a major hazard to our aging society. Proprioception plays an essential role in balance
control because it is used by the central nervous system to mediate muscle control of joint stability, posture, and movement. Knee proprioception is arguably the most important. In the current study,
it has been reported that cognitive impairment is correlated with physical function. Thus, the aim of the study is to analyze the relationship between the proprioception and the cognitive and emotion
in older individuals.
Methods:Thirty-seven participants were healthy volunteers aged 50-70 years old, from a community-based sample. The subjects received an explanation of the procedures and methods and
provided informed consent before the experiment. Proprioception can be assessed by measuring joint position sense. The proprioception test consisted of an active reproduction of active positioning
test. Joint position sense was tested at 15 degrees, 30 degrees, and 60 degrees knee flexion. Three trials were completed at each angle. The main outcome measure was joint position sense absolute
error (AE). Cognitive parameters included simple reaction time test and visuospatial memory span test. Emotion tests were assessed using the Beck Anxiety Inventory (BAI), State Trait Anxiety
Inventory-state portion (STAI-Form Y), Beck Depression Inventory (BDI) and Rosenberg Self-esteem Scale (RSES). The collected data were analyzed by correlation analysis using the SPSS program (ver.
Results:The simple reaction time test was a strongly positive correlated with left knee joint proprioception at 15 degrees (r=0.64, p=0.00). BDI was positive correlated with left knee
joint proprioception at 30 degrees (r=0.40, p=0.02). RSES was negative correlated with right knee joint proprioception at 15 degrees (r=-0.34, p=0.05). BAI was a strongly positive correlated with
right knee joint proprioception at 60 degrees (r=0.43, p=0.01). BDI was a strongly positive correlated with right knee joint proprioception at 60 degrees (r=0.57, p=0.00). AI was positive correlated
with right knee joint proprioception at 60 degrees (r=0.38, p=0.03).
Conclusions:This study indicates that the knee proprioception level is associated with the cognitive functions and emotion in community-dwelling elderly individuals. This conclusion
warrants further studies.