Low-level Lead Exposure Impairs Fronto-executive Functions: A Call to Update the DSM-5 with Lead Poisoning as a...

Area of Science:

• Neuroscience
• Environmental Health
• Psychiatry

Background:

• Lead (Pb²⁺) exposure remains a significant public health issue, affecting millions of children.
• Blood lead levels indicate absorption and potential distribution throughout the body.
• The brain is a critical target organ for lead toxicity.

Purpose of the Study:

• To review evidence linking lead exposure to fronto-executive dysfunctions (FED).
• To argue for the inclusion of lead poisoning within neurodevelopmental disorder classifications in the DSM-5.
• To highlight the potential impact of DSM-5 inclusion on diagnosis, resources, and research.

Main Methods:

• Literature review of research on lead exposure and neurodevelopmental effects.
• Synthesis of evidence demonstrating lead's impact on the brain.
• Argumentation for reclassification based on scientific findings.

Main Results:

• Decades of research confirm the brain as a primary target for detrimental lead effects.
• Lead exposure is strongly associated with fronto-executive dysfunctions (FED).
• Current evidence supports classifying lead poisoning as a neurodevelopmental disorder.

Conclusions:

• Lead poisoning significantly impacts cognitive functions, particularly executive functions in children.
• Reclassifying lead poisoning as a neurodevelopmental disorder in the DSM-5 is warranted.
• Inclusion in the DSM-5 could improve diagnostic acceptance and access to interventions and research funding.