Related Experiment Video
Updated: Jun 5, 2026
07:30
A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
Published on: September 21, 2017
Suicide of a cyclist
Ulrike Schmidt1, Thomas Rost, Lara Jungmann
1Institute of Legal Medicine, Freiburg University Medical Center, Albertstr. 9, 79104 Freiburg, Germany. ulrike.schmidt@uniklinik-freiburg.de
Forensic Science International
|December 25, 2010
Summary
This study examines the challenging identification of suicides in road traffic fatalities, particularly single-vehicle accidents. It details a case where a 71-year-old man intentionally rode his bicycle into a wall, resulting in fatal injuries.
Area of Science:
- Forensic Pathology
- Traffic Safety Research
- Mental Health Studies
Background:
- Suicides account for an estimated 1-8% of road traffic fatalities.
- Identifying intentional self-harm in traffic incidents is challenging without explicit indicators like suicide notes.
- A history of mental illness is common among individuals who die by suicide via traffic incidents.
Observation:
- The case involves a 71-year-old man who deliberately rode his bicycle into a house wall at the end of a hill road.
- The incident resulted in severe injuries, including open craniocerebral trauma and aortic rupture.
- No apparent technical or driving errors were noted, suggesting intentionality.
Findings:
- The bicyclist's actions were deemed intentional, consistent with suicide.
- The specific circumstances and injury patterns support the conclusion of suicide.
- This case highlights the difficulty in definitively classifying traffic fatalities as suicides.
Implications:
- Accurate classification of road traffic fatalities is crucial for public health and safety initiatives.
- Understanding the methods and circumstances of suicide can inform prevention strategies.
- Further research is needed to improve the identification of suicides in traffic accidents.
Related Concept Videos
01:26Cross-bridge Cycle
As muscle contracts, the overlap between the thin and thick filaments increases, decreasing the length of the sarcomere—the contractile unit of the muscle—using energy in the form of ATP. At the molecular level, this is a cyclic, multistep process that involves binding and hydrolysis of ATP, and movement of actin by myosin.
01:18Autophagic Cell Death
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
02:09Bystander Effect
The discussion of bullying highlights the problem of witnesses not intervening to help a victim. This is a common occurrence, as the following well-publicized event demonstrates. In 1964, in Queens, New York, a 19-year-old woman named Kitty Genovese was attacked by a person with a knife near the back entrance to her apartment building and again in the hallway inside her apartment building. When the attack occurred, she screamed for help numerous times and eventually died from her stab wounds.
01:30Overview of Cell Death
Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
01:21Kubler Ross's Stages of Dying
Elisabeth Kübler-Ross significantly advanced psychology's understanding of the process of dying with her influential book, On Death and Dying (1969). She focused on studying terminally ill individuals and outlined five stages commonly experienced when coping with death: denial, anger, bargaining, depression, and acceptance.
In denial, individuals reject the reality of their condition, often thinking, "This isn't true; I feel fine," as a way to protect themselves from emotional distress. Anger...
In denial, individuals reject the reality of their condition, often thinking, "This isn't true; I feel fine," as a way to protect themselves from emotional distress. Anger...
01:29Cardiac Cycle
The cardiac cycle refers to the sequence of events that occur in the heart from the beginning of one heartbeat to the next. It's characterized by alternating periods of contraction (systole) and relaxation (diastole) of the heart muscles.
During the cardiac cycle, blood flow through the heart is regulated entirely by changing pressure gradients. This sequence of events begins with the heart in a state of total relaxation, known as mid-to-late diastole, during which blood passively flows from...
During the cardiac cycle, blood flow through the heart is regulated entirely by changing pressure gradients. This sequence of events begins with the heart in a state of total relaxation, known as mid-to-late diastole, during which blood passively flows from...