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Central auditory deficits and temporal-lobe lesions.

C Speaks, T Gray, J Miller

The Journal of Speech and Hearing Disorders

|May 1, 1975

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Auditory pathways from the weaker ear can transmit speech information to the brain, even with temporal-lobe lesions. Speech presented to the weaker ear interacts with the stronger ear during dichotic listening tests.

Area of Science:

Neuroscience
Audiology
Speech Processing

Background:

Unilateral temporal-lobe lesions can affect auditory processing.
Dichotic listening tests assess auditory pathway function.

Purpose of the Study:

To investigate the speech transmission capacity of auditory pathways from the weaker ear in patients with unilateral temporal-lobe lesions.
To determine if speech information is completely suppressed in the weaker ear during dichotic stimulation.

Main Methods:

Examined 10 patients with unilateral temporal-lobe lesions.
Utilized dichotic listening tests to assess auditory pathway function.
Analyzed speech information transmission from the weaker ear.

Main Results:

Related Experiment Videos

Evidence suggests auditory pathways from the weaker ear are not completely suppressed.
Speech presented to the weaker ear interacts with competing speech in the stronger ear.
Articulatory features from both ears can blend into a single response.

Conclusions:

Auditory pathways from the weaker ear retain some capacity for speech transmission.
Speech information is not entirely suppressed in the weaker ear during dichotic listening.
Findings inform models of unilateral central auditory deficits, including ipsilateral-suppression and transmission-line models.