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One-Jang Jeng

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Publications by One-Jang Jeng (bibliography)

1993

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Jeng, One-Jang and Radwin, Robert G. (1993): Feasibility of Using the Gap Detection Tactility Test for Monitoring Cutaneous Sensory Deficits. In: Proceedings of the Human Factors and Ergonomics Society 37th Annual Meeting 1993. pp. 764-768.

“Periodic worker monitoring methods are needed for detecting cumulative trauma disorders, such as carpal tunnel syndrome (CTS), in the early stages. An experiment was conducted for studying the feasibility of using a new aesthesiometer for periodically measuring functional tactile sensitivity. It was conducted to investigate gap detection sensory threshold differences between five normal subjects and seven subjects diagnosed having CTS. The gap detection test was used because of its functional resemblance to many work-related activities. Average gap detection sensory threshold using the index finger was 0.21 mm (SD = 0.14 mm) for the normal subjects and increased 114% to 0.45 mm (SD = 0.16 mm) for the CTS subjects when finger probing was allowed. Average gap detection sensory threshold using the index finger was 1.57 mm (SD = 0.56 mm) for the normal subjects and increased 61% to 2.53 mm (SD = 0.82 mm) for the CTS subjects when finger probing was not allowed. The results suggest that people suffering from CTS may experience similar functional deficits in daily living and work activities. A strong relationship was also observed between electrophysiologic variables and the gap detection sensory thresholds when both the CTS and normal hands were pooled. This suggests that performance in the gap detection test might measure the level of median nerve function in CTS.”

1992

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Radwin, Robert G., Jeng, One-Jang, Gisske, Edward T. and Park, Young-Lae (1992): Development of a New Automated Tactility Test for Assessing Hand Sensory Function. In: Proceedings of the Human Factors Society 36th Annual Meeting 1992. pp. 775-778.

“Design and test results of an automated aesthesiometer for measuring gap detection threshold in a tactile inspection task are presented. What distinguishes this test from conventional tactility tests, such as two-point discrimination or monofilaments, is that it measures performance in a functional tactility task resembling those performed during manual work activities. Although test conditions are highly controlled, this test still permits natural finger probing activity while sensing surface feature defects like scratches, rather than sensing static unnatural sensory stimuli such as distinguishing two points, or detecting a point-pressure stimulus. The size of a precision scratch, or gap, introduced in an otherwise smooth surface is controlled using a micropositioner capable of producing a gap as small as 0.1 {micro}m. Finger contact force is also carefully controlled within 100 mg accuracy for loads between 25 g and 75 g using a precision balance beam system. This instrument is entirely under microcomputer control and can be administered on a table-top in the field. In this study, normative performance is compared between static and dynamic sensory function rapid method of limits threshold detection paradigm. Probability of detecting randomly presented stimuli was also studied.”

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