Functional MRI was performed to investigate differences in the basic functional organization of the primary and secondary auditory cortex regarding preferred stimulus lateralization and frequency. A modified sparse acquisition scheme was used to spatially map the characteristics of the auditory cortex at the level of individual voxels. In the regions of Heschl's gyrus and sulcus that correspond...

Svetlana Levitan, Ioana Stoica, James A. Reggia Depts of Computer Science and Neurology, Inst. Adv. Comp. Studies University of Maryland, College Park, MD 20742 USA Email: [email protected], [email protected] Abstract Cortical sensory maps in mammalian brain exhibit various kinds of asymmetry and lateralization, the causes and mechanisms of which are not well understood and are a subject of co...

In recent years, it has become apparent that behavioural and brain lateralization at the population level is the rule rather than the exception among vertebrates. The study of these phenomena has so far been the province of neurology and neuropsychology. Here, we show how such research can be integrated with evolutionary biology to understand lateralization more fully. In particular, we address...

The objective of this paper was to elucidate the relation between psychophysical lateralization and the neural generators of the corresponding auditory evoked potentials. Auditory brain stem responses to binaural click stimuli with different interaural time- and level differences were obtained in 12 subjects by means of multi-channel EEG recording. Data were modeled by equivalent current dipole...

BACKGROUND Atypical lateralization of language-related functions has been repeatedly found in individuals with autism spectrum conditions (ASC). Few studies have, however, investigated deviations from typically occurring asymmetry of other lateralized cognitive and behavioural domains. Motor deficits are among the earliest and most prominent symptoms in individuals with ASC and precede core soc...

OBJECTIVE This paper describes and assesses a new semi-automatic method for temporal lobe seizures lateralization using raw scalp EEG signals. METHODS We used the first two Hjorth parameters to estimate quadratic mean and dominant frequency of signals. Their mean values were computed on each side of the brain and segmented taking into account the seizure onset time identified by the electroen...

Although lateralization for language functions gives the sheer authority of language centers and control to the left hemisphere, there is a strong debate among the specialists regarding which hemisphere has the responsibility for language. There is not a complete meeting ground among the scholars on the roles of each hemisphere in language processes either. The recent studies including the adva...

The present study is to determine the effects of background noise on the hemispheric lateralization in music processing by exposing 14 subjects to four different auditory environments: music segments only, noise segments only, music + noise segments, and the entire music interfered by noise segments. The hemodynamic responses in both hemispheres caused by the perception of music in 10 different...

Predation pressure acts on the behaviour and morphology of prey species. In fish, the degree of lateralization varies between high- and low-predation populations. While lateralization appears to be widespread in invertebrates, we do not know whether heredity and early experience interact during development as in vertebrates. Here we show, for the first time, that an exposure to predator odour p...

ateralization, generally defined as the preferential use of one side of the body over another, is a result of certain processes being more highly developed in one hemisphere of the brain versus the other. Numerous scientific studies suggest that lateralization is most likely a defining feature in all mammals and perhaps all vertebrates. This study tested for lateralization in vertebrates by exa...