Proprioceptive Sense in the Shoulder Joint of Blind and Blindfolded Sighted Subjects

概要

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Proprioceptive sense at the shoulder joint was measured through an arm movement reproduction task. A given joint angle at the shoulder was achieved passively by the subject and the subject was then asked to reproduce the joint angle with the same arm. The joint angles were measured by means of a motion analyzer system (NAC, Model HSV-400). The tasks were conducted in three different conditions for the left and right arms. These conditions were distinguished based on the direction of the arm movement and head position. Six blind (age 23-28, mean 24.6 years) and six blindfolded sighted (age 23-25, mean 23.8 years) persons were selected as subjects. Both blind and blindfolded sighted subjects were able to discriminate any joint angles at the joint shoulder reliably. Based on absolute error, the reproduction accuracy of blind subjects was not significantly different from blindfolded sighted subjects. Absolute error at the target position of 50 deg. was significantly greater than absolute error at the target position of 90 and 120 deg. Furhtermore, the reproduction accuracy of the left and right arms were not significantly different. The direction of arm movement and head position had no influence on the accuracy of arm movement reproduction.
筑波大学の論文
1999-02-15