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Related Experiment Video

Updated: Jul 11, 2026

Memorization-Based Training and Testing Paradigm for Robust Vocal Identity Recognition in Expressive Speech Using Event-Related Potentials Analysis

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Recognizing a mother's voice in the persistent vegetative state.

C Machado¹, J Korein, E Aubert

¹Institute of Neurology and Neurosurgery, Apartado Postal 4268, Ciudad de La Habana 10400, Cuba. braind@informed.sld.cu

Clinical EEG and Neuroscience

|September 12, 2007

Summary

This summary is machine-generated.

A near-drowning survivor in a vegetative state (VS) recognized his mother's voice. This brain activity, measured by quantitative electroencephalography (QEEGt), suggests residual linguistic processing in VS patients.

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Area of Science:

Neuroscience
Neurology
Cognitive Science

Background:

Vegetative state (VS) diagnosis relies on clinical criteria, often indicating profound brain dysfunction.
Assessing residual cognitive function in VS patients is challenging but crucial for prognosis and care.
Near-drowning incidents can lead to severe traumatic brain injury and prolonged VS.

Observation:

An 8-year-old boy in a vegetative state for 4 years after near-drowning was studied.
Brain activity was measured using quantitative electroencephalography (QEEGt), integrating MRI and EEG data.
The patient was exposed to his mother's voice and voices of unknown women.

Findings:

Significant differences in brain activity (14-58 Hz, peak at 33.2 Hz gamma band) were observed when listening to his mother's voice compared to unknown voices.
These differences were localized to the lateral and posterior regions of the left hemisphere.
No significant brain activity differences were found between unknown women's voices and basal conditions.

Implications:

Demonstrates mother's voice recognition in a patient clinically diagnosed as vegetative state.
Indicates high-level residual linguistic processing capabilities in VS patients.
Raises significant ethical and practical considerations for the management and care of patients in a vegetative state.