Right-hemisphere linguistic functioning.

Area of Science:

• Neuroscience
• Psycholinguistics
• Cognitive Science

Background:

• The traditional view posits left cerebral hemisphere dominance for language.
• Emerging evidence suggests the nondominant hemisphere contributes to linguistic processing.
• Understanding hemispheric specialization in language is crucial for cognitive neuroscience.

Purpose of the Study:

• To review experimental evidence on the linguistic capabilities of the adult nondominant hemisphere.
• To investigate qualitative and quantitative differences in language functioning between cerebral hemispheres.
• To synthesize findings on right hemisphere language processing.

Main Methods:

• Systematic review of peer-reviewed experimental literature.
• Inclusion of studies employing diverse methodologies for language assessment.
• Focus on studies comparing left and right hemisphere language functions in adults.

Main Results:

• The nondominant hemisphere exhibits distinct roles in language processing beyond mere semantic understanding.
• Evidence suggests the right hemisphere contributes to aspects like prosody, emotional tone, and figurative language.
• Quantitative and qualitative differences in language functioning between hemispheres are consistently reported.

Conclusions:

• The nondominant hemisphere possesses significant linguistic processing abilities.
• Rethinking strict left-hemisphere dominance is necessary for a comprehensive model of language.
• Further research should explore the nuanced contributions of both hemispheres to language.