Stimulus-dominance effects and lateral asymmetries for language in normal subjects and in patients with a single functional hemisphere

Brain and Cognition
Marirosa Di StefanoMarzia Viti

Abstract

The assessment of language laterality by the dichotic fused-words test may be impaired by interference effects revealed by the dominant report of one member of the stimuli-pair. Stimulus-dominance and ear asymmetry were evaluated in normal population (48 subjects of both sex and handedness) and in 2 patients with a single functional hemisphere. Results show that in normals the number of stimulus-dominated responses is five times higher than in patients, and is negatively correlated to the index of laterality. It is suggested that dichotic stimuli may interfere one with another during the subcortical acoustic processing and at cortical level, when competing for verbal output. Subcortical interference accounts for stimulus-dominance in the single-hemisphere patients. In normal subjects, the dichotic discrimination is disturbed mainly during the hemispheric cross-talk needed for the oral-verbal processing of dichotic inputs. The frequency of 'interhemispheric' interference, as well as the extents of ear asymmetry, may both depend on differences in the processing stage of the competing inputs, and then they may be influenced by differential verbal skills of LH and RH. Very unequal levels of verbal analysis of the dichotic stimuli m...Continue Reading

References

Sep 1, 1977·The Journal of the Acoustical Society of America·B H Repp
Aug 1, 1976·The Journal of the Acoustical Society of America·B H Repp
May 1, 1975·Journal of Experimental Psychology. Human Learning and Memory·D W Massaro
Dec 1, 1992·Perceptual and Motor Skills·L Jäncke
Mar 1, 1989·Journal of Speech and Hearing Research·N NiccumR Leathers
Aug 1, 1970·The Journal of the Acoustical Society of America·M Studdert-Kennedy, D Shankweiler
Jan 1, 1983·Neuropsychologia·B E Wexler, T Halwes
Jan 1, 1980·Language and Speech·B Haitjema-Huisman, M P van den Broecke
Feb 29, 1996·Neuroreport·F MichelJ Intriligator
Feb 1, 1996·Brain and Cognition·C Chiarello, L Maxfield
May 1, 1996·Neuropsychologia·A E Asbjornsen, M P Bryden
Aug 14, 2001·Experimental Brain Research·C DobelB Rockstroh
Jan 10, 2002·Brain and Language·H E McNeely, S E Parlow
Jul 12, 2002·Experimental Brain Research·Margret Hund-GeorgiadisD Yves von Cramon
Jun 20, 2003·NeuroImage·Steven M BermanEran Zaidel
Mar 1, 1954·Journal of Experimental Psychology·D E BROADBENT

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Citations

Dec 22, 2006·Brain Research·Anja BethmannAndré Brechmann
Jan 27, 2019·Medical Education·Abigail Ford Winkel, Helen K Morgan

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