Temporal information processing as a basis for auditory comprehension: clinical evidence from aphasic patients

Area of Science:

• Neuroscience
• Cognitive Psychology
• Speech and Language Therapy

Background:

• Temporal information processing (TIP) is crucial for cognitive functions including language, memory, and attention.
• Deteriorated time perception, indicated by elevated auditory temporal-order-threshold (TOT), is observed in various clinical groups.
• Previous research suggests links between impaired TIP and cognitive deficits in conditions like aphasia.

Purpose of the Study:

• To investigate the relationship between elevated auditory temporal-order-threshold (TOT) and cognitive impairments in patients with post-stroke aphasia.
• To explore the connection between temporal perception, language comprehension, and attentional resources in this patient group.

Main Methods:

• Thirty patients with post-stroke aphasia (aged 50-81) were assessed.
• Temporal information processing was measured using the auditory temporal-order-threshold (TOT).
• Auditory comprehension was evaluated using the Token Test, Phoneme Discrimination Test (PDT), and Voice-Onset-Time Test (VOT). Attentional resources were assessed using the Test of Attentional Performance (TAP).

Main Results:

• Significant correlations were found between elevated TOT and poorer performance on all language tests.
• Elevated TOT also correlated significantly with reduced alertness.
• Intercorrelations were observed among language tests and between the Phoneme Discrimination Test (PDT) and attentional tasks.

Conclusions:

• The findings support the role of TIP as a core process underlying both language and attention.
• This study provides novel evidence in Slavic language users demonstrating the co-occurrence of timing, auditory comprehension, and attention relationships.
• Impaired temporal perception may contribute to language and attention deficits in post-stroke aphasia.