Abstract：
:We tested the hypothesis that geniculate X cells are the neural substrate of psychophysically identified pattern channels and that geniculate Y cells are the neural substrate of psychophysically identified flicker channels. The hypothesis was tested by measuring the relative sensitivity of isolated X and Y cells in the dorsal lateral geniculate nucleus of the cat to counterphase and on-off grating presentations. The fundamental and second harmonic responses of X and Y cells to sinusoidal counterphase and on-off temporal modulation were measured at a number of spatial frequencies using two contrasts, 0.1 and 0.4. The fundamental responses of both X and Y cells to sinusoidal counterphase were greater relative to on-off responses. The second harmonic responses of Y cells to counterphase were larger at high spatial frequencies. Contrast sensitivity also was measured. At all spatial frequencies, both X and Y cells were slightly more sensitive to counterphase than to on-off presentations. Since flicker sensitivity in humans is twice as high for counterphase as for on-off presentations across all spatial frequencies, whereas pattern sensitivity is equal for the two presentations, we conclude that X and Y cells do not subserve uniquely pattern and flicker sensitivity, respectively. This conclusion is based on the result that differences between X and Y cells to counterphase and on-off presentations were inconsistent with the differences observed for pattern and flicker sensitivity. We suggest then that a spatial/temporal dichotomy does not seem to accurately characterize the functional roles of X and Y cells.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Frascella J,Lehmkuhle Sdoi
10.1007/BF00240505subject
Has Abstractpub_date
1984-01-01 00:00:00pages
117-26issue
1eissn
0014-4819issn
1432-1106journal_volume
55pub_type
杂志文章abstract：:We examined opioid binding in fractions with disconnected nerve endings (secretosomes) which were prepared from porcine neurohypophyses by centrifugation in a discontinuous Percoll gradient. Specific (= displaceable) binding was observed with 3H-etorphine and with 3H-diprenorphine, two ligands with low selectivity for...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00271856
更新日期：1988-01-01 00:00:00
abstract：:Stellate cells within the ventral cochlear nucleus (VCN) are a diverse cell group that have been classified according to their size and morphology. Some of these stellate cell types constitute major projection neurones into the brainstem and directly into the inferior colliculus, while others are implicated in more lo...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-003-1602-6
更新日期：2003-12-01 00:00:00
abstract：:Saccadic latencies measured in response to a step-wise displacement of the target may be substantially reduced if a gap separates the offset of the initial fixation point and the onset of the peripheral target. According to Fischer and Ramsperger (1984) this paradigm provokes a bimodal latency distribution which consi...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229892
更新日期：1992-01-01 00:00:00
abstract：:In the present work, we characterize electrophysiologically a commissural subcortical pathway which is related to binocular interactions in the nucleus of the optic tract (NOT) of the opossum. The main role played by the circuit comprising this pathway seems to be in relaying information coming from the ipsilateral ey...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00227519
更新日期：1994-01-01 00:00:00
abstract：:This study examined hippocampal theta power during configural and non-configural tasks in rats. Experiment 1 compared hippocampal theta power during a negative patterning task (A+, B+, AB-) to a configural task and a simple discrimination task (A+, B-) as a non-configural task. The results showed that hippocampal thet...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-012-3359-2
更新日期：2013-03-01 00:00:00
abstract：:Morphometric changes have been studied at the mouse neuromuscular junction (NMJ) as a function of the frequency of stimulation. In vivo stimulation was made at either 10, 25, 50 or 100 Hz. No significant change in the area of NMJ profiles is observed after stimulation. This indicates that stimulation does not change t...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237590
更新日期：1986-01-01 00:00:00
abstract：:Vibration on localised areas of skin can be used to signal spatial orientation, multi-directional motion and also to guide arm and hand movements. This study investigated the possibility that vibration at loci on the skin might also be used to cue gaze direction. Eight subjects made eye or (head + eye) gaze saccades i...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-007-1231-6
更新日期：2008-03-01 00:00:00
abstract：:Studies on motor learning typically present a constant adaptation stimulus, corresponding to the desired final adaptive state. Studies of the auditory and optokinetic systems provide compelling evidence that neural plasticity is enhanced when the error signal driving adaptation is instead adjusted gradually throughout...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-008-1537-z
更新日期：2008-12-01 00:00:00
abstract：:Many studies demonstrated a higher accuracy in perception and action when using more than one sense. The maximum-likelihood estimation (MLE) model offers a recent approach on how perceptual information is integrated across different sensory modalities suggesting statistically optimal integration. The purpose of the pr...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-009-2099-4
更新日期：2010-04-01 00:00:00
abstract：:Transcranial magnetic stimulation (TMS) applied over the occipital lobe approximately 100 ms after the onset of a stimulus decreases its visibility if it appears in the location of the phosphene. Because phosphenes can also be elicited by stimulation of the parietal regions, we asked if the same procedure that is used...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-014-3888-y
更新日期：2014-06-01 00:00:00
abstract：:Peak grip aperture has often been used to quantify the influence of illusions on judgments of size for action. However, a larger peak grip aperture need not mean that the object looks larger. It could also mean that it was grasped more carefully. These two possibilities can be distinguished on the basis of the velocit...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0744-8
更新日期：2007-01-01 00:00:00
abstract：:The objective of this study was to investigate interhemispheric transcallosal connections between primary motor cortices noninvasively in awake human subjects. For this purpose, focal transcranial magnetic stimulation was performed on eight healthy, right-handed subjects and one patient with congenital collosal agenes...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00227944
更新日期：1996-12-01 00:00:00
abstract：:The fluorescent double-labeling technique has been used to determine whether the corticopontine and the corticotectal fibers in the cat are derived from two different sets of neurons or whether they are derived from branching neurons which distribute collaterals to the pontine grey and the colliculi. After unilateral ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00269447
更新日期：1987-01-01 00:00:00
abstract：:Intracellular recording techniques were used to test for cross-modality and topographic convergence among inputs to area 3a of cerebral cortex. Recordings were made within the projection area of group I afferent fibers of the deep radial nerve in barbiturate-anesthetized cats. Epsps were evoked in 90% of neurons (81/9...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00236532
更新日期：1985-01-01 00:00:00
abstract：:Vection is the illusion of self-motion in the absence of real physical movement. The aim of the present study was to analyze how multisensory inputs (visual and auditory) contribute to the perception of vection. Participants were seated in a stationary position in front of a large, curved projection display and were e...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-013-3793-9
更新日期：2014-03-01 00:00:00
abstract：:Emotional processing that occurs partially in advance of perceptual processing is known as pre-perceptual emotional processing. The facilitation of sensory processing due to pre-perceptual emotional processing can be observed in visual search and attentional blink tasks. However, previous event-related potential studi...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-015-4486-3
更新日期：2016-02-01 00:00:00
abstract：:Human gait is a complex process in the central nervous system that results from the integrity of various mechanisms, including different cortical and subcortical structures. In the present study, we investigated cortical activity during lower limb movement using EEG. Assisted by a dynamic tilt table, all subjects perf...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-010-2223-5
更新日期：2010-05-01 00:00:00
abstract：:The axon initial segment of cortical principal neurones contains an organelle consisting of two to four stacks of flat, membrane-delineated cisternae alternating with electron-dense, fibrillar material. These cisternal organelles are situated predominantly close to the synaptic junctions of GABAergic axo-axonic cell t...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228742
更新日期：1994-01-01 00:00:00
abstract：:Single cell activity was recorded from the putamen in rhesus monkeys (Macaca mulatta) performing limb movements made both with and without a preceding preparatory "set" concerning the impending direction of movement. The monkeys were trained to perform an elbow step-tracking task, each trial of which required the subj...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00247293
更新日期：1987-01-01 00:00:00
abstract：:An object held in precision grip creates predictable load forces on the hand during voluntary hand movement and these are associated with anticipatory modulation of grip force. Conflicting results have been obtained over whether predictable external load perturbations result in anticipatory grip force responses (e.g. ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0537-0
更新日期：2006-10-01 00:00:00
abstract：:Vibratory stimulation of the neck muscles can elicit illusory drift of a visual target; after vibration stops, motion in the opposite direction is perceived. This motion aftereffect (MAE) could be due to adaptation of proprioceptive mechanisms that encode head orientation, or at a stage where visual and proprioceptive...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-007-0910-7
更新日期：2007-07-01 00:00:00
abstract：:Six cats were reared with surgically produced squint or atropinisation of one eye during the sensitive period of development. Five cats were reared without an ocular interference but in the same environment as the experimental cats. Four of these normally reared cats provided control data for perikaryal size. When the...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235784
更新日期：1982-01-01 00:00:00
abstract：:Responses to pure visual stimuli and visual-vestibular interactions similar to those reported in other vertebrates were found in single vestibular nucleus neurons in cat. Contrary to prevailing hypotheses, the cerebellum is not an essential part of the pathway mediating these visual responses. ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00239555
更新日期：1978-08-15 00:00:00
abstract：:Postischemic spontaneous hyperthermia as a complication of occlusion of the middle cerebral artery with an intraluminal filament has been observed by some authors, but many other reports do not discuss this factor. The possible reasons why some of the authors have not seen severe hyperthermia in their experiments incl...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-001-0909-4
更新日期：2002-01-01 00:00:00
abstract：:After partial (spared-root) or complete hindlimb deafferentation, locomotion and accurate limb placement during locomotion recover considerably. In the present study movement was studied during and after recovery to determine whether altered motor patterns could substitute for normal ones in the recovery of motor beha...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00248226
更新日期：1988-01-01 00:00:00
abstract：:Normal development of motor function was compared to that of cats with spinal transections at birth (newborn operates) or at approximately two weeks after birth (two week operates). Newborn operates expressed motor behavior not seen until sometime later in normal newborn cats, suggesting that this behavior is normally...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00238857
更新日期：1986-01-01 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：:The main input of the lateral part of the cat's lateralis posterior-pulvinar complex (LP-P) comes from the primary visual cortex. We investigated the response properties of cells in area 17 projecting to the striate-recipient zone (LP1) of the cat's LP-P complex. The cells' receptive fields were stimulated with drifti...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00227105
更新日期：1993-01-01 00:00:00
abstract：:The biceps femoris (BF) muscle is divided into three neuromuscular compartments defined by the innervation patterns of the main nerve branches (English and Weeks 1987). The goals of this study were i) to determine how different regions of the biceps femoris muscle are activated in the intact cat during a broad range o...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229406
更新日期：1991-01-01 00:00:00
abstract：:Neurons in the caudal portions of the medial and descending vestibular nuclei and in vestibular cell group f that project to the cervical or lumbar spinal cord were located by antidromic spinal stimulation. These caudal vestibulospinal tract (CVST) neurons have a median conduction velocity of 12 m/sec, which is well b...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00239733
更新日期：1978-06-19 00:00:00
