1. What is Medullary Index?

The Medullary Index is a forensic and anthropological measurement used to determine the ratio between the width of the medulla (central core) and the overall width of a hair shaft. This index helps in species identification and hair analysis.

2. How Does the Calculator Work?

The calculator uses the Medullary Index formula:

Where:

• \( Medulla\ Width \) — Width of the hair medulla in micrometers (μm)
• \( Hair\ Width \) — Total width of the hair shaft in micrometers (μm)

Explanation: The ratio provides a standardized measurement that helps differentiate between human and animal hairs, as well as between different animal species.

3. Importance of Medullary Index Calculation

Details: Accurate Medullary Index calculation is crucial for forensic investigations, anthropological studies, and veterinary medicine for proper hair identification and species determination.

4. Using the Calculator

Tips: Enter both medulla width and hair width in micrometers (μm). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical Medullary Index for human hair?
A: Human hair typically has a Medullary Index less than 0.3, while animal hair usually has an index greater than 0.5.

Q2: Why is Medullary Index important in forensic science?
A: It helps distinguish between human and animal hairs at crime scenes, providing valuable evidence in criminal investigations.

Q3: How should hair measurements be taken?
A: Measurements should be taken using a calibrated microscope with micrometer scale, preferably at the widest part of the hair shaft.

Q4: Are there limitations to Medullary Index analysis?
A: Yes, some animal hairs may have indices similar to human hair, and hair condition (damaged or treated) can affect accuracy.

Q5: Can Medullary Index determine specific animal species?
A: While it helps narrow down possibilities, additional microscopic features are usually needed for precise species identification.