Related Experiment Video
Updated: Feb 7, 2026

Collecting Hair Samples for Hair Cortisol Analysis in African Americans
Published on: June 10, 2018
The concentrations of bioelements in the hair samples of Jordanian children who stutter
Mazin Alqhazo1, Ayat Bani Rashaid2
1Department of Rehabilitation Sciences, Jordan University of Science and Technology, Irbid, Jordan.
Objectives:
This study investigates the levels of 15 bioelements (calcium, copper, chromium, sodium, iron, magnesium, manganese, zinc, cobalt, selenium, molybdenum, vanadium, potassium, boron, and lithium) in the hair species of Jordanian stutterer.
Methods:
The subjects of the study included 25 cases of stuttering, and 25 normal children (age and sex matched). The severity of stuttering (low, moderate, and severe) were assessed using Stuttering Severity Instrument, Fourth edition (SSI-4). Hair samples of subjects were cut, washed, dried, physically degraded, hydrolyzed, and analyzed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS).
Results:
Results indicated that the levels of bioelements (Calcium, Copper, Chromium, Magnesium, Manganese, Cobalt, Selenium, Molybdenum, Vanadium, Boron, and Lithium) were significantly lesser in the hair samples of stuttering group than the control group.
Conclusion:
The findings of the current study could support the use of biochemical analyses as diagnostic biomarker for stuttering.
Related Concept Videos
Hair Cells
Accessory Structures of the Skin: Hair and Hair Follicles
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
Concentration Cells
Consider the following voltaic cell:
Solution Concentration and Dilution
Stress Concentrations
The stress...
Stress Concentrations

