Related Experiment Video
Updated: May 23, 2026

09:14
Paw-Dragging: a Novel, Sensitive Analysis of the Mouse Cylinder Test
Published on: April 29, 2015
[Puppe's rule--a literature review]
Gunther Geserick1, Klaus Krocker, Ingo Wirth
1Landesinstitut für gerichtliche und soziale Medizin Berlin.
Summary
Puppe's rule, established in 1903, determines the sequence of skull fractures from head injuries and gunshot wounds. This forensic principle, though limited by ossification issues, helps ascertain injury order.
Area of Science:
- Forensic Pathology
- Biomechanics of Trauma
Background:
- Puppe's rule, first described in 1903, establishes that subsequent fractures terminate at existing fracture lines.
- This principle was validated through experimental studies by forensic pathologists.
- The rule's applicability extends to both blunt force trauma and gunshot-induced skull fractures.
Discussion:
- In cases of gunshot fractures, Puppe's rule allows for more detailed analysis of injury sequencing.
- The rule's effectiveness can be compromised by factors such as incomplete ossification or ossification disorders.
- The priority rule is recognized in international literature but often without attribution to its originator.
Key Insights:
- The sequence of skull fractures can be determined by observing where new fractures meet pre-existing ones.
- Gunshot fractures offer greater potential for detailed sequential analysis using this rule.
- Ossification status is a critical factor influencing the reliable application of Puppe's rule.
Outlook:
- Further research could explore methods to overcome limitations posed by ossification variations.
- Investigating the historical attribution of the priority rule in English literature may clarify its provenance.
- Expanding the application of this rule to diverse fracture patterns could enhance forensic investigations.
Related Concept Videos
Review and Preview
In statistics, several tools are used to interpret the data. Measures of central tendency represent the characteristics of the data, such as mean, median, and mode. Additionally, measures of variance like standard deviation and range are used to find the spread of data from the mean. Relative standing measures the distance between data locations. Commonly used measures of relative standings are percentile, z score, and quartiles.
Percentiles are a type of fractile that partition data into...
Percentiles are a type of fractile that partition data into...
Review and Preview
Data are individual items of information obtained from a population or sample. Data may be classified as qualitative (categorical), quantitative continuous, or quantitative discrete. Because it is not practical to measure the entire population in a study, researchers use samples to represent the population. A random sample is a representative group from the population chosen by using a method that gives each individual in the population an equal chance of being included in the sample. Random...
Methods of Documentation II: POMR
The Problem-Oriented Medical Record (POMR) revolutionized medical record-keeping by introducing a systematic approach focusing on the patient's problems rather than merely listing symptoms. Dr. Lawrence Weed's introduction of this method in the 1960s marked a significant advancement in medical documentation. The POMR framework consists of four key components: the database, problem list, plan of care, and progress notes.
Feedback Loops
In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
Social Proof
Social proof is a form of persuasion based on comparison and conformity. People compare their behavior and actions to what others are doing and will change to conform to do what their peers do.
Feedback Inhibition
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!