Relative optimum grip span as a function of hand anthropometry

Investigating interrelationships between Lower Palaeolithic stone tool effectiveness and tool user biometric variation: implications for technological and evolutionary changes

“…Indeed, within the 20 smallest handed individuals in the present sample, Mann-Whitney U tests identified that it was significantly more efficient for them to utilise flakes in all three task conditions than it was for them to use handaxes (p = 0.0001, in each instance). While future experiments are necessary (e.g., Eksioglu, 2004), both this and the main experimental results support the hypothesis that the origin of the Acheulean may be linked to relatively large, relatively more human-like, hands. Thus, the onset of the Acheulean was likely not only dependent upon relevant cognitive abilities (e.g.…”

“…Larson et al, 2009). This is not surprising as the ability to exert force upon a tool, and thus comfortably grip, manipulate, and resist a tool, has been previously linked to an individual's manual dimensions, with optimal tool sizes altering in line with tool-user hand size (Eksioglu, 2004;Figure 5).…”

“…Relative to what is known about how stone tool related behaviours may have influenced the evolution of human hand anatomy, however, a great deal less has been empirically demonstrated in respect to how biometric variation may have impacted on technological choices and cultural variability in the Lower Palaeolithic. The notion that individual biometric differences significantly influence hand-held tool use or gripping tasks is, however, both long lived and widely supported within engineering and ergonomic literature (e.g., Tichauer and Gage, 1977;Hall, 1997;Ruiz-Ruiz et al, 2002;Edgren et al, 2004;Nicolay and Walker, 2005;Hwang et al, 2011), with it having been demonstrated on a number of occasions that optimal tool forms are directly related to the biometric traits of tool users (e.g., Eksioglu, 2004;Seo and Armstrong, 2008). Such considerations indicate that those tool forms that are of greatest functional value, and thus the tool forms most likely to be replicated, are determined by the biometric conditions observed in a tool user's upper limb.…”

Diseño de dispositivo de apoyo en terapias de rehabilitación a nivel distal de los dedos de la mano

“…En este ámbito la antropometría adquiere gran importancia, considerando que proporciona información relevante de lo que se quiere diseñar [18]. Los requerimientos para el diseño de la féru-la se realizaron considerando diferentes medidas antropométricas para un percentil 95 [19][20][21]; cuyos promedios corresponde con las siguientes medidas antropométricas: ancho palmar (8.9 cm), largo total de la férula (20 cm), contorno de la muñeca (18 cm), ancho del dedo pulgar (2.5 cm), longitud del dedo pulgar (5.2 cm), largo total de la mano (19.8 cm), largo de la palma de la mano (10.3 cm). La férula posicional de reposo debe permitir el descanso de la mano, se extiende desde la punta de los dedos hasta la muñeca.…”

Research of Grip Forces and Subjective Preferences for Various Individual Finger Grip Spans by using an

“…많은 연구자들이 파지 폭과 악력과의 연구를 통하여 사 용자에게 적합한 최적의 파지 폭을 찾고자 노력해 왔다 (Petrofsky et al, 1980;Pheasant and Scriven, 1983;Talsania and Kozin, 1998;Eksioglu, 2004 (Fransson and Winkel, 1991;Oh and Radwin, 1993;Blackwell et al, 1999) …”