Abstract:
:The responses of 192 single units in the cat's pulvinar-complex, comprising the inferior, medial and lateral pulvinar nuclei, were studied in paralysed cats, lightly anaesthetized with N2O/O2 supplemented with pentobarbitone. About 60% of the cells were visually driven and their receptive fields classified as either diffuse, concentric, movement sensitive, direction sensitive or orientation sensitive. The response fields of such cells were commonly large. Response field maps for the movement and direction sensitive cells formed a heterogenous population with uniform on-off fields to more complex arrangements with on- or off-centres, often with only partial surrounds; other cells responded exclusively to moving stimuli. A dual representation of the visual field was found in the pulvinar-complex corresponding to the striate and tectal recipient zones described anatomically by others. The representation in the striate recipient zone comprised an oblique column running medio-laterally and rostro-caudally through the inferior pulvinar and lateral margin of the medial pulvinar. The peripheral visual field was represented laterally and the vertical meridian medially; the upper visual field was represented dorso-laterally in the medial pulvinar and the lower visual field caudo-ventrally within the inferior pulvinar. That this visuotopic organization corresponded to the striate recipient zone was established by tracing the retrograde transport of HRP. Medial to the striate zone evidence for a second visual field representation was found, apparently more randomly organized than the striate zone, corresponding to the presumed tectal recipient zone. These results support the assertion that cytoarchitectural boundaries do not necessarily delineate functional (visuotopically organized) regions. These observations suggest caution when comparing cytoarchitecturally defined regions between species; rather, 'functionally equivalent' regions should be compared.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Mason Rdoi
10.1007/BF00235804subject
Has Abstractpub_date
1978-01-18 00:00:00pages
51-66issue
1eissn
0014-4819issn
1432-1106journal_volume
31pub_type
杂志文章abstract::We investigated the effect of correlation in background noise on the ability of participants to detect a kinaesthetic target on the index fingers of their hands. Participants had to judge whether the target (a smoothed ramp with quarter-sine onset and offset), was on the left or right finger (experiments 1 and 2). The...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-005-2273-2
更新日期:2005-08-01 00:00:00
abstract::Ideal grasping movements should maintain an appropriate probability of success, while controlling movement-related costs, in the presence of varying visual (and motor) uncertainty. It is often assumed that the probability of errors is managed by adjusting a margin for error in hand opening (e.g., opening the hand wide...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-019-05489-z
更新日期:2019-04-01 00:00:00
abstract::Transparency is perceived when two or more objects or surfaces can be separated by the visual system whilst they are presented in the same region of the visual field at the same time. This segmentation of distinct entities on the basis of overlapping local visual cues poses an interesting challenge for the understandi...
journal_title:Experimental brain research
pub_type: 杂志文章
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更新日期:2013-09-01 00:00:00
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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
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journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-004-2194-5
更新日期:2005-04-01 00:00:00
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journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-003-1698-8
更新日期:2004-03-01 00:00:00
abstract::Precise left-hand movements take longer than right-hand movements (for right-handers). To quantify how left-hand movements are affected by task difficulty and phase of movement control, we manipulated the difficulty of repetitive speeded aiming movements while participants used the left or right hand. We observed left...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-012-3110-z
更新日期:2012-07-01 00:00:00
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journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-002-1112-y
更新日期:2002-07-01 00:00:00
abstract::Simultaneous recordings of action potentials (APs) of multiple single motor units (MUs) were obtained in brachialis and biceps (caput breve) muscles during sinusoidally modulated isometric contractions of elbow flexor muscles and during sinusoidal flexion/extension movements in the elbow against a preload in the exten...
journal_title:Experimental brain research
pub_type: 临床试验,杂志文章
doi:10.1007/s002210050205
更新日期:1997-10-01 00:00:00
abstract::Two experiments were conducted to determine the effects of conditioned circling on the concentrations of dopamine (DA), 3,4-dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) within discrete regions of the striatum (STR). The first study assessed the inherent regional distributions of these compounds with ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00247949
更新日期:1989-01-01 00:00:00
abstract::Evidence is presented that simple cells in the cat striate cortex (area 17) fail to respond to two dimensional random patterns but respond vigorously to one dimensional patterns with identical power at the preferred orientation of the cell. Further observations suggest that complex cells inhibit simple cells so as to ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00238391
更新日期:1981-01-01 00:00:00
abstract::Recent studies have demonstrated that dyslexia is associated with deficits in the temporal encoding of sensory information. While most previous studies have focused on information processing within a single sensory modality, it is clear that the deficits seen in dyslexia span multiple sensory systems. Surprisingly, al...
journal_title:Experimental brain research
pub_type: 临床试验,杂志文章
doi:10.1007/s00221-005-2387-6
更新日期:2005-10-01 00:00:00
abstract::Extracellular recordings were performed from turtle red nucleus neurons to examine their responsiveness to peripheral somatic stimulation and to study differences between rubral sensory and movement-related responses. In pentobarbital sodium-anesthetized or decerebrate turtles, red nucleus neurons could be divided int...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00242899
更新日期:1996-02-01 00:00:00
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journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-007-1188-5
更新日期:2008-03-01 00:00:00
abstract::Previous studies have reported abnormalities in fine hand and finger movements following interruption of the fasciculus cuneatus (FC) in primates. We report here that many of these deficits could be caused by an inability to actively regulate the position of the finger. Three macaques were trained to maintain the inde...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00227785
更新日期:1993-01-01 00:00:00
abstract::Microscopic illumination of two neighbouring photoreceptor cells within a single ommatidium induces a strong sequence-dependent response in a directionally selective, motion-sensitive neuron. The response is characterized by a strong facilitation in the preferred direction and a weaker inhibition in the reverse direct...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00236243
更新日期:1984-01-01 00:00:00
abstract::In 15 musicians, cortical DC-potentials were recorded from the scalp before and during the execution of bimanual motor sequences. Subjects (Ss) either tapped with their two index fingers in synchrony (quavers against quavers; "2 against 2") or they tapped quavers against triplets ("2 against 3"). Either the right or t...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00229320
更新日期:1990-01-01 00:00:00
abstract::Functionally and anatomically, the orbicularis oculi (OO) muscle can be subdivided in a pretarsal, a preseptal, and an orbital portion. In the rhesus monkey, fluorescent and neuronal retrograde tracing experiments were performed in the pretarsal or the orbital portion of the OO muscle, or both, using fast blue, diamid...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s002210050478
更新日期:1998-08-01 00:00:00
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journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-017-5136-8
更新日期:2018-02-01 00:00:00
abstract::The effect of the intermittency of visual information in the bimanual coordination of an isometric force coordination task was investigated as a function of criterion force level. Eight levels of visual information intermittency (.2-25.6 Hz) were used in blocked fashion at each force level. Participants were required ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-016-4606-8
更新日期:2016-07-01 00:00:00
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journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00230303
更新日期:1993-01-01 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::A force-matching task was used to study the influence of constraining tactile information from the hand on the perception of forces generated with the index finger flexors, the palmar prehensile grasp and with the elbow flexors. Subjects generated the same reference forces (2-10 N) with each muscle group and matched t...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-005-0259-8
更新日期:2006-01-01 00:00:00
abstract::We determined whether uncertainty about the location of one's hand in virtual environments limits the efficacy of online control processes. In the Non-aligned and Aligned conditions, the participant's hand was represented by a cursor on a vertical or horizontal display, respectively. In the Natural condition, particip...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-010-2487-9
更新日期:2011-02-01 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::There is ample evidence that motor learning changes the function of perceptual systems. Previous studies examining the interactions between speech production and perception have shown that the discrimination of phonetic contrasts characterized by the difference in articulatory place features is altered following their...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-019-05584-1
更新日期:2019-09-01 00:00:00
abstract::Extracellular recordings of neuronal activity made in the lumbosacral spinal segments of the anesthetized cat have disclosed the existence of a set of neurons in Rexed's laminae III-VI that discharged in a highly synchronized manner during the occurrence of spontaneous negative cord dorsum potentials (nCDPs) and respo...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-002-1303-6
更新日期:2003-02-01 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::The electrophysiological properties of the two major glial cell types in cultures from the regenerating goldfish optic nerve/tract were studied with patch-clamp techniques. Spindle-shaped cells express myelin proteins. These oligodendrocyte-like cells possess outwardly rectifying currents, do not show glutamate activa...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00231855
更新日期:1991-01-01 00:00:00
abstract::In walking cats decerebrated at the premammillary level, single neurone activity of Purkinje cells (P-cells) with long corticofugal axons was recorded in the cerebellar vermis. The P-cells (N = 145) were identified as they showed spontaneous simple and complex spikes and also antidromic activation from Deiters' nucleu...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00238886
更新日期:1981-01-01 00:00:00