Introduction: The neural substrates of temporal processing are not still fully known. The majority of interval timing studies have dealt with this subject in the context of “Explicit timing” (computing the time intervals explicitly). The hypothesis “Implicit timing” (implicitly using temporal processing to improve function) has also proposed. This lesion study addressed explicit and implicit ti...

During evolution, the human brain developed remarkable functional differences between left and right hemispheres. Due to this lateralization, disorders of spatial orienting occur predominantly after right brain damage and disorders of language after left brain damage. In contrast to this general pattern, few individuals show disturbed spatial orienting (spatial neglect) after left brain damage....

OBJECTIVES To examine differences in power spectra and intra-hemispheric coherence between the left and right hemispheres in the presence of severe asymmetric brain damage. METHODS Power spectra and coherence functions were computed for a patient with severe damage to subcortical gray matter structures on the right side but relative preservation on the left. RESULTS Power spectra differed m...

BACKGROUND According to the interhemispheric inhibition model of neglect, the uninjured hemisphere inhibits (via the corpus callosum) the injured hemisphere but the injured hemisphere can no longer inhibit the opposite hemisphere, which becomes hyperactive and produces an ipsilesional attentional bias. Alternatively, according to the compensation hypothesis, the uninjured hemisphere helps compe...

In typical right-handed patients both apraxia and aphasia are caused by damage to the left hemisphere, which also controls the dominant right hand. In left-handed subjects the lateralities of language and of control of the dominant hand can dissociate. This permits disentangling the association of apraxia with aphasia from that with handedness. Pantomime of tool use, actual tool use and imitati...

Studies of brain-damaged subjects indicate that recognizing a familiar voice and discriminating among unfamiliar voices may be selectively impaired, and thus that the two are separate functions. Familiar voice recognition was impaired in cases of damage to the right (but not the left) hemisphere, while impaired unfamiliar voice discrimination was observed in cases with damage to either hemisphere.

The left and right hemispheres of the brain are generally known to be associated with different types of processing. The left hemisphere is associated with linguistic, sequential and logical processing. The right hemisphere is associated with abstract and visuospatial reasoning and creative processing. In narrative discourse, explanation can be considered abductive reasoning, described as a cre...