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Hammer blows to the head.

F Ramsthaler1, M Kettner2, S Potente1

  • 1Institute of Legal Medicine, Saarland University, Saarbrücken, Kirrbergerstraße, Geb. 49.1, 66421 Homburg Saar, Germany.

Forensic Science International
|June 19, 2019
PubMed
Summary
This summary is machine-generated.

Physical characteristics significantly influence hammer blow intensity. Men generate stronger blows than women, with upper arm circumference and shoulder width correlating to impact force, impacting injury potential.

Keywords:
Blunt forceHammer blowMuscle massPhysical condition

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Area of Science:

  • Forensic Science
  • Biomechanics
  • Physical Anthropology

Background:

  • Hammer blows are a significant cause of severe and fatal injuries, particularly head trauma.
  • Assessing injury potential requires understanding weapon characteristics and attacker's physical attributes.

Purpose of the Study:

  • To investigate the relationship between a perpetrator's physical constitution and hammer blow intensity.
  • To scientifically validate or refute the common assumption that stronger individuals deliver more forceful blows.

Main Methods:

  • 113 volunteers participated in various experimental settings involving hammer strikes.
  • Measurements included striking power, number of strokes per unit time, and impact forces.
  • Correlation analysis was performed between physical measurements (e.g., arm circumference, shoulder width, grip force) and impact forces.

Main Results:

  • Significant differences in striking power were observed between males and females, exceeding expectations.
  • Skull fracture is highly probable with a 300g hammer by men (9/10 cases), compared to women (approx. 2/10 cases).
  • Upper arm circumference and shoulder width significantly correlated with individual blow impact forces for both sexes.

Conclusions:

  • Physical attributes, particularly in males, demonstrably increase hammer blow intensity.
  • A simple grip force measurement can serve as a parameter for estimating impact force.
  • Understanding these physical dependencies is crucial for interpreting the effects of hammer-related violence.