Thumb Plastic Guard Effect on the Insertion of Push Pins Using Psychophysical Methodology
The present study was made through the usage of the psychophysical methodology applied to 14 women previously being trained for 4 days making insertion tests with the usage of their thumb finger on time frames of 8 h for five days to obtain knowledge. Maximum strength level in the insertion of 1 to 4 Push-pins using a thumb splint. During the investigation 14 workstations with push pins involved on the labor operation were selected, more than 90% were above the recommended acceptance limit of strength, which is of 10 lb from 1–7 push pins and 7 lb from 8–12 (Longo et al. 2004). This research evaluates the usage of a thumb plastic guard customized to plant population to implement new protective personal equipment in order to increase the strength of this muscular group in workstation with push pins.
Test was divided into 4 weekly sessions; First is an inclusion per minute with dominant hand, non-dominant and both thumbs per minute, Second: two insertions per minute with dominant hand, non-dominant and both thumbs, Session 3: three insertions per minute with dominant hand, non-dominant and both thumbs, Session 4: four insertions per minute with dominant hand and non-dominant. It showed that performance with splint increase since without this device applied force does not exceed 11 lb.
KeywordsPsychophysical methodology Maximum strength level
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