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Related Experiment Video

Updated: Feb 24, 2026

A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures

A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures

Published on: July 2, 2014

Speech segmentation in aphasia.

Claudia Peñaloza¹, Annalisa Benetello^2,3, Leena Tuomiranta⁴

¹Cognition and Brain Plasticity Group, Bellvitge Biomedical Research Institute - IDIBELL, Barcelona, Spain.

|August 22, 2017

Summary

Individuals with chronic aphasia can segment words from running speech using statistical learning, a key language learning skill. This ability is linked to verbal short-term memory and brain regions like the left inferior frontal gyrus.

Keywords:

aphasia language learning speech segmentation statistical learning

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Area of Science:

Neuroscience
Psycholinguistics
Speech and Language Pathology

Background:

Speech segmentation is crucial for language acquisition.
Previous research has not explored speech segmentation in individuals with aphasia.
Some individuals with aphasia demonstrate preserved novel word learning.

Purpose of the Study:

To investigate the speech segmentation abilities of individuals with chronic aphasia using statistical learning.
To explore the relationship between speech segmentation, aphasia severity, and short-term memory capacity.
To examine the influence of lesion location on speech segmentation and short-term memory.

Main Methods:

Validated an artificial language speech segmentation task with young adults.
Assessed 14 individuals with chronic aphasia and 14 matched elderly controls.
Utilized group and case-by-case analyses to compare performance against chance and controls.

Main Results:

Aphasia group performed significantly above chance in word segmentation, comparable to controls.
Speech segmentation was not linked to aphasia severity but correlated with verbal short-term memory.
Four participants with mild fluent aphasia and posterior lesions showed preserved segmentation and better short-term memory.

Conclusions:

Speech segmentation via statistical learning remains functional in chronic aphasia.
This language learning mechanism is associated with verbal short-term memory.
Left inferior frontal region integrity is suggested to play a role.