Research master thesis | Archaeology (research) (MA/MSc)
open access
The human hand is a complex structure that is heavily involved in many everyday activities. As such, it can serve as a useful area for activity reconstruction in the past. Though its function and...Show moreThe human hand is a complex structure that is heavily involved in many everyday activities. As such, it can serve as a useful area for activity reconstruction in the past. Though its function and evolution have long been studied, parts of it still need to be better understood. There is evidence to suggest that the fifth ray of the hand contributes significantly to grip strength and stability in a way that has so far gone largely ignored. The aim of this study is two-fold. First, it seeks to gain a better understanding of the function and use of the fifth digit in habitual activity on the basis of three postmedieval Dutch populations. Second, it investigates habitual activity and occupation among the individuals that belonged to these communities to gain a better understanding of the lives led by people in the post-medieval Netherlands. In order to achieve those goals, the study analyses activity patterns among hand entheses through the “Validated Entheses-based Reconstruction of Activity” (VERA) method. The method is applied to 3D scans of the hand bones of 43 adult individuals. Multivariate statistics, including principal component analysis, are used for the analysis of the entheseal attachment sizes. The analysis showed that the muscles of the fifth ray are recruited in both precision and power grips in different capacities. It suggests that the fifth ray is an important supporting structure that aids in the execution of power and precision grips through its opposing position to the thumb. It is also used to provide stability by pulling it towards the other fingers. The results of this study support the assumption that the fifth ray of the hand plays a crucial role in everyday manual activity. They also suggest that a deeper understanding of its role could provide additional insights into different kinds of grasping activities in the past. The analysis further showed that the three different groups exhibit different activity patterns. The lower-class urban individuals or Arnhem exhibit a trend towards more intense power grasping, while the higher-class urban individuals from Zwolle showed a tendency for precision grasping activity. This is consistent with historical records that suggest the Zwolle individuals had worked as merchants, investors, and in similar professions, while the working poor in the city of Arnhem were probably working in factories and in the local tobacco production. The individuals from the rural community of Middenbeemster fell somewhat surprisingly in the middle of the other two groups, with a sizeable number of individuals exhibiting precision gripping patterns. This suggests that, despite this community having mainly revolved around dairy farming, individual life experiences were likely quite varied. Future analyses of the fifth ray should expand on the groundwork laid in this study by increasing the sample size, looking into individuals from different contexts and time periods, and looking into potential connections between the fifth ray and the fourth ray, wrist, and forearm.Show less