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Intraoperative observation of changes in cochlear nerve action potentials during exposure to electromagnetic fields generated by mobile phones.

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Colletti V, Mandalà M, Manganotti P, Ramat S, Sacchetto L, Colletti L. · 2010

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Mobile phone radiation caused measurable nerve disruption in all patients tested, with effects lasting 5 minutes after exposure ended.

Plain English Summary

Summary written for general audiences

Italian researchers directly observed how mobile phone radiation affects nerve function in the inner ear during brain surgery on seven patients. When they placed an active mobile phone over the exposed brain area for 5 minutes, all patients showed measurable disruption to their cochlear nerve signals - the nerves responsible for hearing. These nerve disruptions lasted for about 5 minutes after the phone was removed, suggesting the electromagnetic fields can cause temporary but significant changes to nerve function.

Why This Matters

This study provides some of the most direct evidence to date that mobile phone radiation can measurably disrupt nerve function in the human auditory system. What makes this research particularly compelling is that the scientists could observe nerve activity in real-time during surgery, eliminating many variables that complicate other EMF studies. The fact that all seven patients showed consistent nerve disruption during exposure suggests this isn't a random finding. While the surgical setting makes it difficult to directly extrapolate to everyday phone use, the research demonstrates that EMF exposure can cause measurable, temporary changes to nerve conduction. This adds important biological plausibility to concerns about long-term effects from regular mobile phone use, especially given that many people hold phones directly against their heads for extended periods daily.

Exposure Information

Specific exposure levels were not quantified in this study. Duration: 5 min

Study Details

The aim of this study is to investigate Intraoperative observation of changes in cochlear nerve action potentials during exposure to electromagnetic fields generated by mobile phones.

To determine with objective observations if exposure to mobile phone EMF affects acoustically evoked...

All patients showed a substantial decrease in amplitude and a significant increase in latency of coc...

The possibility that EMF can produce relatively long-lasting effects on cochlear nerve conduction is discussed and analysed in light of contrasting previous literature obtained under non-surgical conditions. Limitations of this novel approach, including the effects of the anaesthetics, craniotomy and surgical procedure, are presented in detail.

Cite This Study
Colletti V, Mandalà M, Manganotti P, Ramat S, Sacchetto L, Colletti L. (2010). Intraoperative observation of changes in cochlear nerve action potentials during exposure to electromagnetic fields generated by mobile phones. J Neurol Neurosurg Psychiatry.82(7):766-71, 2010.
Show BibTeX
@article{v_2010_intraoperative_observation_of_changes_1990,
  author = {Colletti V and Mandalà M and Manganotti P and Ramat S and Sacchetto L and Colletti L.},
  title = {Intraoperative observation of changes in cochlear nerve action potentials during exposure to electromagnetic fields generated by mobile phones.},
  year = {2010},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/21172864/},
}
PubMed: 21172864

Cited By (12 papers)

Quick Questions About This Study

Yes, Italian researchers found that mobile phone radiation directly disrupted cochlear nerve signals in all seven brain surgery patients tested. The nerve disruptions occurred within minutes of exposure and lasted about 5 minutes after the phone was removed, showing measurable effects on hearing nerve function.
According to a 2010 surgical study, cochlear nerve disruptions from mobile phone radiation lasted approximately 5 minutes after exposure ended. All patients showed decreased nerve signal amplitude and increased latency during the 5-minute exposure period, with effects persisting briefly afterward.
Mobile phone radiation causes substantial decreases in cochlear nerve signal amplitude and significant increases in signal latency. Italian researchers observed these changes in real-time during brain surgery, finding that electromagnetic fields can temporarily but significantly alter inner ear nerve function.
Yes, when researchers placed active mobile phones over exposed brain areas during surgery, all patients showed measurable disruption to their cochlear nerve signals within 5 minutes. These hearing nerve changes suggest electromagnetic fields can directly impact nerve conduction in the inner ear.
Research during brain surgery demonstrates that electromagnetic fields from mobile phones can cause temporary nerve conduction changes. All seven patients tested showed altered cochlear nerve responses during exposure, with effects lasting several minutes after the electromagnetic field source was removed.