9.0 kg. and a minimal of 4.0 kg. for the major hand. As seen in ' 3 and 5 little difference was found in average major and minor strengths for both chuck and lateral pinches. COMMENTS This study shows slightly higher strength of grip for the major than that reported by Bechtol and significantly stronger pinch with the major hand than those presented by Mannerfelt. This difference could be explained by the fact that Mannerfelt exa:
Swanson et al.: Strength of the Hand TABLE 4.-Average Strength of Pulp Pinch with Separate Digits m*3Zf7 (1 00 Subjects) a .?~q TABLE 5.-Average Strength of Lateral Pinch by Occupation (100 Subjects) Digit I1 I11 IV V the thumb-to-index pinch with the arm and forearm in a fixed position. We demonstrated a strength decrease of 6 percent for the major hand and 7 percent for the minor hand when the extremity examined was supported rather than free. The female group showed a similar relative decrease: 9 percent for the major and 10 percent for the minor hand. .- Pulp pinch, kg. Occupation Skilled Sedentary Manual Average - . - - - - Male hand Lateral pinch, kg. Major 5.3 5.6 3.8 2.3 - .- . Female hand Minor 4.8 5.7 3.6 2.2 Major 3.6 3.8 2.5 1.7 Male hand Minor 3.3 3.4 2.4 1.6 Major 6.6 6.3 8.5 7.5 Female hand Minor 6.4 6.1 7.7 7.1 Major 4.4 4.1 6.0 4.9 Minor 4.3 3.9 5.5 4.7
Bulletin of Prosthetics Research-Fall 1970 We were attempting to register the true maximal strength o f . individual, hence the extremities were tested without support. were no obvious differences between measurements made in the m and in the afternoon. The strongest grips recorded for the major were 70.4 kg. in a 29-year-old-male surgical resident and 38.6 kg. 33-year-old female secretary. COMPARISONS BETWEEN THE MAJOR AND MINOR HANDS The gripping strength of the minor hand was the same as, or than, the major one in 29 percent of the individuals examined. ever, the grip of the major hand was always found to be the stro for heavy manual workers. The chuck pinch of the minor hand as strong as, or stronger than, that of the major hand in 50 percen the males and 54 percent of the females tested. This finding was also of 40 percent of the manual workers examined. The same diffe in strength between the major and minor hands was demonstra the lateral pinch. In 12 percent of the individuals examined the 1 hand was dominant. Of these 12 persons, 8 or 58 percent had a stro grip with the minor hand. On the average, grip strength of the minor hand was found td 5.4 percent weaker in males and 8.9 percent in females. The stren of pinch of the minor hand was weaker by 4 percent in males percent in females. The data obtained in this study indicate that is less difference in strength of the major and minor hands than generally been thought. SUMMARY This study surveyed the hand strength of 100 individuals (200 han The basic hand patterns evaluated were: grip, three-digit pinch (c pinch), pinch with separate fingers (pulp pinch), and lateral p A Jamar hydraulic dynamometer was used to measure grip. The stren of the various pinches was tested with an electronic pinch meter.
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- Fall '12
- Hand strength, pinch, Chuck Pinch