Abstract:
:Previous findings from our laboratory have shown that the optic nerves of goldfish acclimated to different temperatures differ considerably in their glycerophospholipid composition. This paper describes changes in the morphology of the nerve with different acclimation and fixation temperatures. Optic nerves of 5 and 25 degrees C acclimated fish were excised and fixed at the temperature of acclimation, or at the reverse temperature, and the morphology observed by electron microscopy. Under all temperature conditions considered there is a statistically significant linear relationship between the radius of the axon and the number of myelin lamellae. However, the temperature of acclimation and fixation both influence the regression coefficients for this relationship, the higher the acclimation temperature the lower the coefficient and the higher the fixation temperature the higher the coefficient. The periodicity of the myelin also alters with these temperatures, being greater in the 25 degrees C fish than in the 5 degrees C ones. Myelin sheath thickness is also significantly greater in the 25 degrees C fish. These results are discussed in relation to observed changes in glycerophospholipid composition and conduction velocities.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Matheson DF,Roots BIdoi
10.1007/BF00248501subject
Has Abstractpub_date
1988-01-01 00:00:00pages
63-70issue
1eissn
0014-4819issn
1432-1106journal_volume
72pub_type
杂志文章abstract::The contribution of different cortical regions to visuospatial attention can be probed with the help of perturbation techniques, such as transcranial magnetic stimulation (TMS). Repetitive TMS (rTMS) has also been suggested as a tool for the therapy of brain injuries, by adjusting the neural excitability of injured or...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-008-1449-y
更新日期:2008-07-01 00:00:00
abstract::In anesthetized cats 251 cells within the cortical vestibular projection area, adjacent to the post-cruciate dimple, were analyzed as to their input characteristics employing extracellular recording techniques. The post cruciate dimple vestibular field, which is located in area 3a, has a high degree of convergence bet...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00237688
更新日期:1975-01-01 00:00:00
abstract::The experiments were designed to test two hypotheses and their corollaries: 1. That adaptation of EMG responses to support surface rotations is due to a decrease in the gain of proprioceptively triggered long-loop stretch reflexes (Nashner 1976), and that the adaptation is dependent on a normally functioning vestibula...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00247031
更新日期:1987-01-01 00:00:00
abstract::The effects of bilateral focal cooling of dorsolateral thoracic spinal cord on segmental reflex pathways to the triceps surae muscles were assessed in decerebrate cats from the reflex forces produced by single shocks or trains of electrical stimuli applied to the ipsilateral caudal cutaneous sural and the contralatera...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00230042
更新日期:1995-01-01 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::Spontaneous firing of midbrain reticular formation (MRF) neurons was recorded extracellularly in chronically implanted, behaving cats during steady and transitional states of the sleep-waking cycle. Physiological identification of receiver and/or projection MRF neurons was achieved through orthodromically elicited dis...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00238096
更新日期:1982-01-01 00:00:00
abstract::Efferent and afferent connections of the visually responsive cortex (area anteromedial, AM) located in the anterior portion of area 18b were studied with degeneration and horseradish peroxidase (HRP) methods following small lesions and HRP injections into this area. Degenerating axons, terminals and retrogradely HRP-l...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00237996
更新日期:1984-01-01 00:00:00
abstract::Retinal ganglion cells of adult cats have the potential to regenerate their axons into autografted peripheral nerve. Two months after transplantation of the sciatic nerve to the axotomized optic stump, regenerated axons were labeled anterogradely with biocytin, and myelin formation by Schwann cells was examined electr...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00229107
更新日期:1994-01-01 00:00:00
abstract::The present study was performed to explore the antinociceptive effects of the galanin receptor 1 agonist M617 in lateral habenula complex in rats. Intra-lateral habenula injection of 0.1, 0.5, 1 or 2 nmol of galanin induced dose-dependent increases in hindpaw withdrawal latencies (HWLs) to noxious thermal and mechanic...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-015-4480-9
更新日期:2016-02-01 00:00:00
abstract::Cortical spreading depression (CSD) is influenced by brain excitability and is related to neurological diseases, such as epilepsy. In vitro evidence indicates that neuronal electrical activity is potentiated after CSD. Malnutrition can cause electrophysiological changes in the brain, both in animals and in humans. Her...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-011-2844-3
更新日期:2011-10-01 00:00:00
abstract::The ability of Huntington's disease patients to co-ordinate their two hands with and without external cueing was investigated. Twelve Huntington's disease patients and sex- and age-matched controls performed a bimanual cranking task at two speeds (0.5 Hz, 1.5 Hz) and phase relationships (in-phase, anti-phase), with an...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s002210000485
更新日期:2000-10-01 00:00:00
abstract::"Multisensory integration" refers to the phenomenon by which information from different senses is integrated in order to interpret and guide responses to external events. Here, we advance two specific hypotheses: (1) the process of multisensory integration in spatial localization is statistically optimal, and (2) the ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-006-0847-2
更新日期:2007-06-01 00:00:00
abstract::We have studied the dynamics of human saccades along various cardinal (horizontal and vertical) and oblique directions in two different experimental paradigms yielding fast and slow saccades, respectively. We found that the saturation of vectorial peak velocity with amplitude, which is already well known from earlier ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00228123
更新日期:1990-01-01 00:00:00
abstract::To promote motor learning, robotic devices have been used to improve subjects' performance by guiding desired movements (haptic guidance-HG) or by artificially increasing movement errors to foster a more rapid learning (error amplification-EA). To better understand the neurophysiological basis of motor learning, a few...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-018-5365-5
更新日期:2018-11-01 00:00:00
abstract::Dual task paradigms can be used to examine the interactions between cognition and the control of posture and gait. Measuring and interpreting changes in dual task performance is challenging, however, because many factors can influence performance. This study examined the effects of instructed focus and walking task di...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-010-2429-6
更新日期:2010-11-01 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::Stimulation of the parietal association cortex as well as the frontal motor cortex elicited clearly extracellular unitary activities or field potentials in the ipsilateral inferior olive in the cat. The parietal-induced responses came out generally at a longer and more variable latency than the frontal-induced ones. T...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF01474258
更新日期:1979-09-01 00:00:00
abstract::Norepinephrine (NE)-induced, long-lasting facilitation of the perforant path evoked population spike amplitude in the dentate gyrus (DG) has been reported to occur following iontophoresis of norepinephrine in the DG in vivo and following application of 10 or 20 microM NE to the hippocampal slice in vitro. The present ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00235656
更新日期:1986-01-01 00:00:00
abstract::While mechanisms of orienting attention in unilateral spatial neglect (USN) have frequently been studied in the visual domain, these mechanisms remain relatively unexplored in the auditory domain. Our first goal was to replicate Spence and Driver's (J Exp Psychol Hum 22:1005-1030, 1994) results with a virtual reality ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-016-4691-8
更新日期:2016-10-01 00:00:00
abstract::Sudden stretch of active muscle typically results in two characteristic electromyographic responses: the short latency M1 and the long latency M2. The M1 response originates from the monosynaptic Ia afferent reflex pathway. The M2 response is less well understood and is likely a compound response to different afferent...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-008-1647-7
更新日期:2009-03-01 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::Ocular responses to optokinetic stimulation were reexamined in adult albino rats of two different strains. Eye movements were measured in head-restrained animals using the search coil method. In contrast to some previous results, the albino rats showed optokinetic nystagmus, and some of them made responses comparable ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00235639
更新日期:1985-01-01 00:00:00
abstract::Stimulus-response compatibility (SRC) effects are classified depending on the way that the elements of the stimulus and response sets interact, influencing both the speed and accuracy of the motor response. This is particularly important for social stimuli, such as hands. However, the stimuli used in most SRC studies ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-015-4283-z
更新日期:2015-07-01 00:00:00
abstract::Transient changes in extracellular potassium concentration ([K+]o) and field potentials were evoked by 4-aminopyridine (4-AP; 50-100 microM) and recorded with ion-selective microelectrodes in CA1b, CA3b and dentate sectors of adult rat hippocampal slices. Long-lasting field potentials recurred at a frequency of approx...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00228628
更新日期:1996-04-01 00:00:00
abstract::We previously showed that proprioceptive sensory input from the hindlimbs to the anterior cerebellar cortex of the cat may not be simply organized with respect to a body map, but it may also be distributed to multiple discrete functional areas extending beyond classical body map boundaries. With passive hindlimb stepp...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-017-5067-4
更新日期:2017-11-01 00:00:00
abstract::Two superimposed gratings, which differ in orientation and move independently, combine into a coherently moving plaid if the component gratings are similar. The effect on the plaid motion percept of the addition of texture to each grating was investigated. The texture disambiguates the motion of each component grating...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00228400
更新日期:1993-01-01 00:00:00
abstract::The distribution of anterogradely-labeled fibers and retrogradely-labeled cell bodies in the interpeduncular nucleus (IPN) was mapped after injections of wheat-germ agglutinin conjugated to horseradish peroxidase (WGA-HRP) into various structures of the basal forebrain in adult rats. WGA-HRP injections into the medial...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00279657
更新日期:1988-01-01 00:00:00
abstract::Decision times involved in selecting visual targets with saccadic eye movements in rhesus monkeys were studied for three tasks in which single targets, paired targets with varied asynchronies, and multiple targets requiring a discrimination were presented. Probability of target choice in the paired-target task was str...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-003-1653-8
更新日期:2004-01-01 00:00:00
abstract::We report the connections of cerebellar cortical lobule HVI in the rabbit. We have studied the anterograde and retrograde transport of wheatgerm-agglutinated horseradish peroxidase (WGA-HRP) following its injection into HVI to reveal efferent and afferent connections. All of the cases showed strong anterograde transpo...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00237024
更新日期:1985-01-01 00:00:00
abstract::We investigated the quantitative relationship between saccadic activity (as reflected in frequency of occurrence and amplitude of saccades) and blood oxygenation level dependent (BOLD) changes in the cerebral cortex using functional magnetic resonance imaging (fMRI). Furthermore, we investigated quantitative changes i...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s002210100844
更新日期:2001-11-01 00:00:00