Previous research supported that the prevalence of addiction is related to brain laterality. Brain laterality is often determined by left/right handedness and this phenomenon is considered as an important factor in addiction prevalence. The present study attempts to examine the relationships between left/right handedness with addiction and smoking on Iranian population. In this study, 2000 male...

A left-handed patient with a grade II left frontal lobe astrocytoma had spontaneous seizures causing speech arrest and uncontrolled right upper extremity movements. Word-generation functional MR (fMR) imaging showed activity nearly exclusively in the right inferior frontal gyrus. The clinical history of the speech arrest and the intraoperative mapping proved left-hemisphere language dominance. ...

There are certain well-known relationships between handedness and mode of brain organization. For instance, the large majority of right-handers have speech represented in the left cerebral hemisphere; however, of the left-handed population, about two-thirds have speech represented in the left hemisphere and about one-third in the right. Furthermore, whereas right-handers tend to show a clear-cu...

A test of cerebral dominance for language was administered to 51 cerebral palsied adults. The test consisted of dichotically presented words and in normal speaking adults had previously demonstrated very marked right ear superiority, interpreted as left cerebral dominance. The group of cerebral palsied subjects did not show the predicted right ear superiority. This finding may represent a chanc...

The ability to learn language is a human trait. In adults and children, brain imaging studies have shown that auditory language activates a bilateral frontotemporal network with a left hemispheric dominance. It is an open question whether these activations represent the complete neural basis for language present at birth. Here we demonstrate that in 2-d-old infants, the language-related neural ...

Background and Objectives: Ocular dominance refers to the tendency to prefer visual input from one eye to the other and is found in majority of the individuals. The role of eye dominance as one of the confounding physiologic variables affecting the PRVEP (pattern reversal visual evoked potential) responses needs to be evaluated. Hence, the present study was planned to assess the influence of ey...

The neurophysiology underlying the Behavioral Activation and Behavioral Inhibition Systems (BAS and BIS) and the impact of the strength of these systems on affective processing have received increased attention over the last 25 years. Specifically, left-frontal brain regions have been implicated in BAS strength as well as the experience of positive-approach affect (such as happiness). Conversel...

INTRODUCTION Lateralization of brain functions such as language and manual dominance (hand preferences and fine motor control) are most likely under genetic control. However, this does not preclude the effect of various environmental factors on functional brain lateralization. A strong association of non-right-handedness (left- and mixed-handedness) with various neurodevelopmental conditions (e...

PURPOSE To characterize the interaction between language dominance and lateralization of the epileptic focus for pre- and postoperative Boston Naming Test (BNT) performance in patients undergoing anterior temporal lobectomy (ATL). METHODS Analysis of pre- and postoperative BNT scores depending on lateralization of language as measured by the intracarotid amobarbital procedure (IAP) versus lat...