Abstract：
:A syntactic and a semantic task were performed by German-speaking healthy subjects and aphasics with lesions in the dominant left hemisphere. In both tasks, pictures of objects were presented that had to be classified by pressing buttons. The classification was into grammatical gender in the syntactic task (masculine or feminine gender?) and into semantic category in the semantic task (man- or nature made?). Behavioral data revealed a significant Group by Task interaction, with aphasics showing most pronounced problems with syntax. Brain event-related potentials 300-600 ms following picture onset showed different task-dependent laterality patterns in the two groups. In controls, the syntax task induced a left-lateralized negative ERP, whereas the semantic task produced more symmetric responses over the hemispheres. The opposite was the case in the patients, where, paradoxically, stronger laterality of physiological brain responses emerged in the semantic task than in the syntactic task. We interpret these data based on neuro-psycholinguistic models of word processing and current theories about the roles of the hemispheres in language recovery.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Dobel C,Pulvermüller F,Härle M,Cohen R,Köbbel P,Schönle PW,Rockstroh Bdoi
10.1007/s002210100794keywords:
subject
Has Abstractpub_date
2001-09-01 00:00:00pages
77-85issue
1eissn
0014-4819issn
1432-1106journal_volume
140pub_type
杂志文章abstract：:Quantitative studies were made of the distribution of labeled intracortical axons after focal injections of horseradish peroxidase (HRP) into mouse barrel cortex, in vitro. The pattern of labeled fibers was compared to that of labeled cell bodies with respect to the barrel map in layer IV. We analyzed 4 cortices with ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00231244
更新日期：1990-01-01 00:00:00
abstract：:Directional preferences have previously been demonstrated during horizontal arm movements. These preferences were characterized by a tendency to exploit interaction torques for movement production at the shoulder or elbow, indicating that the preferred directions depend on biomechanical, and not on visual perception-b...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-013-3766-z
更新日期：2014-02-01 00:00:00
abstract：:Clear vision of objects moving in three-dimensional space near an observer is attained by a combination of smooth-pursuit and vergence eye movements. The two systems must interact with the vestibular system to maintain the image of the object on the fovea. Previous studies showed that training with smooth-pursuit vest...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-003-1777-x
更新日期：2004-05-01 00:00:00
abstract：:Motoneurones innervating the retractor bulbi muscle in the cat have been identified by retrograde labelling with horseradish peroxidase, by intracellular recording and by intracellular staining with horseradish peroxidase. Their somata are found in an accessory abducens nucleus, analogous to that described in some oth...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00239148
更新日期：1979-02-15 00:00:00
abstract：:To understand performance of evasive and interceptive actions it is important to know how people decide when to initiate a movement-initiating at the 'right' moment is often essential for successful performance. It has been proposed that initiation is triggered when a perceptually derived quantity reaches an invariant...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-004-1994-y
更新日期：2004-11-01 00:00:00
abstract：:Previous research has demonstrated that viewing one's hand can induce tactile response compatibility effects at the hands. Here, we investigated the question of whether vision of one's own hand is actually necessary. The Eriksen flanker task was combined with the rubber hand illusion in order to determine whether tact...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-014-4129-0
更新日期：2015-02-01 00:00:00
abstract：:The cortical anatomical substrates by which visual information may influence the frontal areas controlling reaching movements to visual targets were studied in monkeys. A reaching task was employed to characterize the arm-related regions of the frontal lobe. Injections of retrograde tracers into these physiologically ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228707
更新日期：1993-01-01 00:00:00
abstract：:In visual cortex of normal adult rabbits, callosal projections are restricted to a 2 mm wide band at the area 17/18 border. In adult rabbits which are monocularly enucleated (ME) on the day of birth, the callosal zone extends 4 mm into the medial region of area 17 in the cortex ipsilateral to the remaining eye. In thi...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00231662
更新日期：1992-01-01 00:00:00
abstract：:This study addresses the question as to the nature of the information on which the preactivation of the appropriate muscles in the grasping of the ball in a one-handed catching task is initiated and coordinated. High speed film and electromyograms were recorded while experiences subjects (N = 4) caught balls--projecte...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229019
更新日期：1992-01-01 00:00:00
abstract：:To test the functional implications of gaze signals that we previously reported in the dorsal premotor cortex (PMd), we trained two rhesus monkeys to point to visual targets presented on a touch screen while controlling their gaze orientation. Each monkey had to perform four different tasks. To initiate a trial, the m...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210050837
更新日期：1999-09-01 00:00:00
abstract：:Extracellular Ca2+ activity (aCa) changes were measured with Ca2+-sensitive microelectrodes in the cat cerebral cortex during iontophoretic administration of excitatory and inhibitory aminoacids. Glutamate, aspartate and DL homcysteate usually decreased aCa from a baseline of 1.3 mM to as low as 0.1 mM. The amplitude ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237788
更新日期：1980-01-01 00:00:00
abstract：:Olfactory neurones of Xenopus laevis were studied by the patch clamp technique under voltage-clamp conditions. Isolated receptor cells were obtained by dissociating the olfactory mucosa in a Ca(2+)-free solution. Usually some of the resulting isolated olfactory cells lost all of their cilia during the dissociation pro...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00231774
更新日期：1991-01-01 00:00:00
abstract：:The whisker-to-barrel pathway of the adult mouse was used in a study on the effects of peripheral sensory deprivation on GAD-immunoreactivity in the somatosensory cortex. At varying periods of time after removal of a set of vibrissal follicles, mice were processed for immunohistochemistry using an antibody against GAD...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00247346
更新日期：1989-01-01 00:00:00
abstract：:The present study attempted to demonstrate that the indicator arm influences end point distribution in contralateral multi-joint proprioceptive tasks and also that intrinsic physical characteristics of multi-joint arms (arm stiffness) may predict the error pattern. For this purpose, we carried out two types of contral...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-012-3196-3
更新日期：2012-10-01 00:00:00
abstract：:Observation of hand movements has been repeatedly demonstrated to increase the excitability of the motor cortical representation of the hand. Little attention, however, has been devoted to its effect on somatosensory processing. Movement execution is well known to decrease somatosensory cortical excitability, a phenom...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-010-2448-3
更新日期：2011-01-01 00:00:00
abstract：:Here we aim to evaluate the ability of transcranial direct current stimulation (tDCS), which is applied over Wernicke's area and its right homologue, to influence lexical decisions and semantic priming and establish an involvement for temporo-parietal areas in lexical and semantic processing. Thirty-two subjects (17 w...
journal_title：Experimental brain research
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00221-013-3416-5
更新日期：2013-04-01 00:00:00
abstract：:We studied in humans the effects of transcranial stimulation of cortical motor areas on the execution of single and sequential rapid arm movements. In a reaction time paradigm with an auditory "go" signal, stimulation given after an auditory tone and before the start of movements delayed the onset but did not affect t...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00233987
更新日期：1994-01-01 00:00:00
abstract：:We examined how cerebellar deficits in isolated reaching or grasping movements contribute to abnormalities in a combined reach and grasp movement, and whether people with cerebellar damage show abnormalities in the spatiotemporal relationships of reach and grasp movements. We studied subjects with cerebellar damage an...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1191-9
更新日期：2002-10-01 00:00:00
abstract：:1. An intracellular study on pyramidal tract (PT) neurons in the cat's motor cortex was carried out to examine whether their antidromic activation would be able to induce plastic changes in the efficacy of the synapses situated on their membrane. 2. The experimental paradigm was based on the principles of classical co...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00236602
更新日期：1981-01-01 00:00:00
abstract：:The axonal conduction latency of brisk-sustained and brisk-transient cat retinal ganglion cells increases with proximity to the area centralis. The trend is gradual with considerable local scatter of latencies, and is similar for cells with crossed and uncrossed axons. ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00238731
更新日期：1975-07-11 00:00:00
abstract：:The present study examined the kinematics of unrestricted reaches to prismatically-displaced targets. The kinematic analysis allowed us (1) to document how and where in the reach adjustments were made to compensate for the prismatic displacement. (2) to detail the changes that occur in the characteristics of reaches d...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00230245
更新日期：1989-01-01 00:00:00
abstract：:The aim of this study was to examine the post-exercise effects of fatiguing the wrist extensor muscles of a single arm on postural tremor and muscle activity in both arms. Previous research has shown that, for neurologically normal subjects, the tremor seen within a single limb segment is uncorrelated to that seen con...
journal_title：Experimental brain research
pub_type： 临床试验,杂志文章
doi：10.1007/s00221-005-0050-x
更新日期：2005-12-01 00:00:00
abstract：:Many previous studies have demonstrated the existence of neurons with tremor-frequency activity ("tremor cells") in the thalamus of Parkinson's disease (PD) patients and these neurons are presumed to play a role in the pathogenesis of tremor. Since a major input to motor thalamus (Voa and Vop) is from the internal seg...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/pl00005606
更新日期：1997-03-01 00:00:00
abstract：:Postural reactions to disruptions of stance are rapid and automatic in both quadrupeds and bipeds. Current evidence suggests that these postural responses are generated by the central nervous system as patterns involving muscle synergies. This study attempted to test this hypothesis of a centrally generated postural m...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237411
更新日期：1986-01-01 00:00:00
abstract：:Intervention-induced neuroplastic changes within the motor or cognitive system have been shown in the human brain. While cognitive and motor brain areas are densely interconnected, it is unclear whether this interconnectivity allows for a shared susceptibility to neuroplastic changes. Using the preparation for a theor...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-020-05933-5
更新日期：2020-12-01 00:00:00
abstract：:Dopamine neurons appear to code an error in the prediction of reward. They are activated by unpredicted rewards, are not influenced by predicted rewards, and are depressed when a predicted reward is omitted. After conditioning, they respond to reward-predicting stimuli in a similar manner. With these characteristics, ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210050467
更新日期：1998-08-01 00:00:00
abstract：:Intermodal attention (IA) is assumed to allocate limited neural processing resources to input from one specific sensory modality. We investigated effects of sustained IA on the amplitude of a 40-Hz auditory (ASSR) and a 4.3-Hz visual steady-state response (VSSR). To this end, we concurrently presented amplitude-modula...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-011-2667-2
更新日期：2011-09-01 00:00:00
abstract：:If horizontal saccades or smooth-pursuit eye movements are made with the line-of-sight at different elevations, the three-dimensional (3D) angular rotation axis of the globe tilts by half the vertical eye eccentricity. This phenomenon is named "half-angle rule" and is a consequence of Listing's law. It was recently fo...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210050943
更新日期：1999-11-01 00:00:00
abstract：:We have developed a tri-axial model of spatial orientation applicable to static 1g and non-1g environments. The model attempts to capture the mechanics of otolith organ transduction of static linear forces and the perceptual computations performed on these sensor signals to yield subjective orientation of the vertical...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0387-9
更新日期：2006-08-01 00:00:00
abstract：:We have studied the ultrastructural features of sensory nerve fibers in the ciliary body and the iris and their parent trigeminal ganglion cells, using intra-axonally transported horseradish peroxidase as a tracer. Unmyelinated nerve fibers of ipsilateral trigeminal origin were found in stroma of both the ciliary body...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235287
更新日期：1984-01-01 00:00:00
