Abstract:
:Previously, we observed changes in the scale, rotation, and location of drawn shapes when subjects simultaneously performed a secondary task, but not in the shape or proportion of the drawing. We suggested the secondary task impacted motor planning and execution or proprioception of the primary task. To isolate for proprioceptive effects, here we used the same secondary task during passive shape perception. A robotic manipulandum moved the subject's hand around the perimeter of a template shape and then a test shape differing in size, proportion, or location. Subjects also performed the same primary task while simultaneously performing a secondary task of reporting the orientation of right or left tilted arrows. We compared the performance between single and dual task, and different workspaces. In single-task conditions, subjects perceived scale, location, and proportion very close to the actual (all biases under 1 cm). A secondary task only increased the uncertainty range for judgment of scale, with no other effect. Subjects judged shapes in the centered workspace to be smaller and closer relative to the template compared with those in the peripheral workspace, although in that workspace, it was more difficult to discern changes in the proportion of the shape. The result for scale in the current passive paradigm is not different from our active study in which efference copy was available. This suggests that the scale parameters of the shape, whether actively or passively encountered, are disrupted by task interference at the level of proprioception or sensory integration rather than motor planning and execution.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Martin BC,Dehghan K,Henriques DYdoi
10.1007/s00221-013-3572-7subject
Has Abstractpub_date
2013-07-01 00:00:00pages
385-96issue
3eissn
0014-4819issn
1432-1106journal_volume
228pub_type
杂志文章abstract::The egocentric localization of objects in extrapersonal space requires that the retinal and extraretinal signals specifying the gaze direction be simultaneously processed. The question as to whether the extraretinal signal is of central or peripheral origin is still a matter of controversy, however. Three experiments ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00229419
更新日期:1991-01-01 00:00:00
abstract::People are good at telling the direction of a moving tactile stimulus and this capacity provides a sensitive clinical test of somatosensory disturbances. Tactile directional sensitivity depends on two different kinds of somatosensory information, i.e. spatiotemporal information and information about friction-induced c...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-005-2343-5
更新日期:2005-10-01 00:00:00
abstract::Endogenous peroxidase-like activity was investigated with a combined light and electron microscopical technique in 15 cats. The lateral cervical nucleus, the dorsal column nuclei, and segments C6 and L5 of the spinal cord were incubated with diaminobenzidine-tetrahydrochloride (DAB) or tetramethylbenzidine (TMB). Afte...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00237283
更新日期:1984-01-01 00:00:00
abstract::In goal-oriented locomotion, healthy adults generate highly stereotyped trajectories and a consistent anticipatory head orienting behaviour, both evidence of top-down, open-loop control. The aim of this study is to describe the typical development of anticipatory orienting strategies and trajectory formation. Our hypo...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-013-3495-3
更新日期:2013-05-01 00:00:00
abstract::The present experiments were designed to investigate the neuronal mechanisms, at the level of the primary somatosensory cortex, which underlie the observation that somatosensory cortical potentials evoked by air puff stimuli directed at the forearm are decreased, in a nonspecific and widespread manner, during voluntar...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00231455
更新日期:1991-01-01 00:00:00
abstract::The aim of this study was to investigate the effect of single joint displacement on the pattern of leg muscle electromyographic (EMG) activity during locomotion. For the first time, unilateral rotational hip or knee joint displacements were applied by a driven orthotic device at three phases of swing during locomotion...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-004-1904-3
更新日期:2004-10-01 00:00:00
abstract::The aim of this study was to investigate the effects of self-reinnervation of the medial (MG) and lateral gastrocnemius (LG) muscles on joint kinematics of the whole hindlimb during overground walking on surfaces of varying slope in the cat. Hindlimb kinematics were assessed (1) with little or no activity in MG and LG...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-007-0938-8
更新日期:2007-08-01 00:00:00
abstract::Three experiments examined interactions between posture control in upright stance and a concurrent location memory task. Healthy young participants stood upright and memorized the locations of dots presented on a computer screen. In the retrieval phase, they indicated whether arrows presented on the screen would pass ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-011-2970-y
更新日期:2012-03-01 00:00:00
abstract::In earlier studies the tetrahydroisoquinoline derivative N-methyl-norsalsolinol (2-MDTIQ) was discovered in lumbar cerebrospinal fluid and brain of patients with Parkinson's disease. To establish whether 2-MDTIQ is toxic to the dopaminergic system, 2-MDTIQ or 6-hydroxydopamine (6-OHDA) were stereotactically injected i...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00227181
更新日期:1996-11-01 00:00:00
abstract::Sensorimotor synchronization is hypothesized to arise through two different processes, associated with continuous or discontinuous rhythmic movements. This study investigated synchronization of continuous and discontinuous movements to different pacing signals (auditory or visual), pacing interval (500, 650, 800, 950 ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-012-3142-4
更新日期:2012-08-01 00:00:00
abstract::The purpose of this study is to analyze the coordination patterns of the elevation angles of lower limb segments following the onset of unsupported walking in children and to look for the existence of a planar covariation rule as previously described in adult human locomotion. The kinematic patterns of locomotion were...
journal_title:Experimental brain research
pub_type: 临床试验,杂志文章
doi:10.1007/s002210000663
更新日期:2001-04-01 00:00:00
abstract::Saccade characteristics in response to moving and stationary targets were studied in three monkeys (Macaca mulatta) that had been trained to look at a target, which after an initial jump either remained in place or moved forward or backward with constant velocity (10 degrees /s). Eye movements were recorded using a se...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-004-2070-3
更新日期:2005-02-01 00:00:00
abstract::Anxious individuals have been shown to interpret others' emotional states negatively. Since most studies have used facial expressions as emotional cues, we examined whether trait anxiety affects the recognition of emotion in a dynamic face and voice that were presented in synchrony. The face and voice cues conveyed ei...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-011-2668-1
更新日期:2011-09-01 00:00:00
abstract::The ability to make accurate reaching movements toward proprioceptively defined target locations was studied in seven normal subjects who were trained to reach to five different targets in a horizontal plane, with no vision of hand or target. The task consisted of moving a handle from a fixed origin to each target loc...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00229793
更新日期:1993-01-01 00:00:00
abstract::Studies on grasp control underlying manual dexterity in people with Parkinson disease (PD) suggest that anticipatory grasp control is mainly unaffected during discrete tasks using simple two-digit grasp. Nevertheless, impaired hand function during daily activities is one of the most disabling symptoms of PD. As many d...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-010-2179-5
更新日期:2010-05-01 00:00:00
abstract::The distribution of synaptic zinc after short-term (up to 48 h) tactile deprivation of vibrissae was investigated in the barrel cortex of mice using histochemical staining. In adult mice, 12 h after trimming selected rows of vibrissae, an increase in zinc staining in the deprived barrels was observed. This increase wa...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-001-0923-6
更新日期:2001-12-01 00:00:00
abstract::Interactions from both inhibitory and excitatory interneurons are necessary components of cortical processing that contribute to the vast amount of motor actions executed by humans daily. As transcranial magnetic stimulation (TMS) over primary motor cortex is capable of activating corticospinal neurons trans-synaptica...
journal_title:Experimental brain research
pub_type: 杂志文章,评审
doi:10.1007/s00221-020-05875-y
更新日期:2020-08-01 00:00:00
abstract::Experiments using the same glass microelectrode (6--8 M omega) for recording and stimulating were performed on 12 rats in which 379 cortical cells were studied in 65 penetrations through the motor and somatosensory cortical zones. To avoid anaesthetic effects the rats were chronically implanted with a head system deri...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00238808
更新日期:1981-01-01 00:00:00
abstract::The aim of this study was to define the relative contribution of self-generated cutaneous and proprioceptive feedback to haptic shape discrimination by systematically constraining the exploratory strategy. Subjects (n = 23) explored pairs of two-dimensional (2-D) angles (standard angle, 90 degrees; comparison angles, ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-006-0728-8
更新日期:2007-04-01 00:00:00
abstract::The integrity of the paramedian pontine reticular formation (PPRF) is necessary for the generation of rapid eye movements. The main saccade-related population is of the burst type with latencies between 0 and 40 ms preceding a saccade, and they can be divided into medium- and long-lead burst neurons. Burst neurons hav...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00237155
更新日期:1983-01-01 00:00:00
abstract::The genesis of the cuneothalamic neurons (CTNs) in the rat cuneate nucleus was determined by a double-labeling method using 5'-bromodeoxyuridine (BrdU), the thymidine analogue, and Fluoro-Gold (FG), a retrograde fluorescent tracer. BrdU-positive cells were observed in the cuneate nucleus in all rats receiving BrdU inj...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-001-0950-3
更新日期:2002-02-01 00:00:00
abstract::Almost two decades ago, sequential effects of human grasping behaviour were described for the first time: In a sequential task, participants persisted in using the previous grasp type. According to the plan-modification hypothesis, such sequential effects reduce the movement planning costs and occur within a limited r...
journal_title:Experimental brain research
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00221-013-3576-3
更新日期:2013-08-01 00:00:00
abstract::A recent study by our group showed that the scaling of reach trajectories to target size is independent of conscious visual awareness of that intrinsic target property (Binsted et al. in Proc Natl Acad Sci USA 104:12669-12672, 2007). The present investigation sought to extend previous work and determine whether uncons...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-008-1385-x
更新日期:2008-07-01 00:00:00
abstract::Brain-damaged patients may extinguish contralesional stimuli when ipsilesional stimuli are presented simultaneously. Most theories of extinction postulate that stimuli compete for pathologically limited attentional resources with a bias to process ipsilesional over contralesional stimuli. Implicit in this view is the ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-003-1823-8
更新日期:2004-07-01 00:00:00
abstract::The aim of the study was to define the spike threshold changes in motoneurons during naturally evoked activation. Spike activity was evoked in the gastrocnemius-soleus motoneurons of decerebrate cats by controlled stretches of the homonymous muscles. The spike thresholds were defined by using the first derivative of t...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-010-2285-4
更新日期:2010-06-01 00:00:00
abstract::The effects of learning on strategy selection in the context of action imitation have been investigated in two experiments conducted with healthy individuals. It was predicted that, once learnt, meaningless actions are processed by the cognitive system as meaningful and this new representational status might influence...
journal_title:Experimental brain research
pub_type: 临床试验,杂志文章
doi:10.1007/s00221-006-0395-9
更新日期:2006-08-01 00:00:00
abstract::During the course of an in vivo intracellular labeling study, a chandelier (axo-axonic) cell was completely filled with biocytin in the CA1 region of the hippocampus. Chandelier cells are known to provide GABAergic terminals exclusively to the axon initial segment of pyramidal cells. The lateral extent and laminar dis...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00230934
更新日期:1992-01-01 00:00:00
abstract::X-ray photography was employed to analyse the postural syndromes following unilateral global and selective lesions of the vestibular apparatus in guinea pigs. Following hemilabyrinthectomy, head rotation in the horizontal plane resulted mainly from rotation of the cervical vertebrae whereas lateral head tilt was due t...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00250579
更新日期:1989-01-01 00:00:00
abstract::Under anesthesia with N2O (70%) and halothane (2-4%), complex spikes of Purkinje cells were extracellularly recorded in the nodulus and flocculus of immobilized pigmented rabbits. Optokinetic stimulation (OKS) was delivered to each eye as repetitive movements of a random dot pattern. The visual field of each eye was d...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00228792
更新日期:1990-01-01 00:00:00
abstract::The firing rate of an abducens motoneuron (AbMN) is linearly related to eye position with slope K, above recruitment threshold theta. Within the AbMN population K increases as theta increases. It is possible that these properties depend on the synaptic drives generated by the major premotor inputs to AbMNs, namely pos...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-002-1176-8
更新日期:2002-09-01 00:00:00