Abstract:
:The present experiment investigated the effects of aging on emotional behavior, without concomitant influences from any previous behavioral manipulation apart from weighing the rats. Anxiety-related behaviors were measured in the elevated plus-maze (EPM). Performance in the open field (OF) was also assessed to control for any effect of aging on exploratory behavior that could account for changes in emotional behavior. Fifty-two naïve male Wistar rats of 3 (3MO), 17 (17MO), or 24 (24MO) months, were submitted to two sessions (5 min each) of EPM, followed by two sessions (2 min each) of OF, on 4 consecutive days. The main emotional indices (open arm entries, ratio of open arm entries to total entries, time spent in open arms, ratio of time in open arms to time in four arms, open arm ends, and head dips) measured in the EPM indicated a lower level of anxiety in aged (24MO) than in young (3MO) rats, whereas middle-aged (17MO) rats showed intermediate values between those of 3MO and 24MO rats; 3MO rats showed higher general motor activity (number of rearings in closed arms of EPM and in OF, and higher number of areas crossed in OF) than 17MO and 24MO rats. We conclude that aging is associated with a decrease in anxiety and in general motor activity.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Torras-Garcia M,Costa-Miserachs D,Coll-Andreu M,Portell-Cortés Idoi
10.1007/s00221-005-2240-ykeywords:
subject
Has Abstractpub_date
2005-07-01 00:00:00pages
177-84issue
2eissn
0014-4819issn
1432-1106journal_volume
164pub_type
杂志文章abstract::The development of the electromyogram (EMG) of tibialis anterior (TA) and medial gastrocnemius (GM) during locomotion was studied in normal rats from the onset of quadruped walking (postnatal day 10, P10) until P42. The objectives were to relate signal properties of the EMG and coordination of muscle activity to funct...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00229036
更新日期:1993-01-01 00:00:00
abstract::Ball-racket interactions were investigated in a task where participants propelled a ball rhythmically into the air. The study contrasted two ball-racket conditions: (1) an elastic impact where the ball was able to rebound due to the elasticity of the colliding objects and participants bounced the ball, and (2) a non-e...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-002-1331-2
更新日期:2003-03-01 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::Judgments on laterality of hand stimuli are faster and more accurate when dealing with one's own than others' hand, i.e. the self-advantage. This advantage seems to be related to activation of a sensorimotor mechanism while implicitly processing one's own hands, but not during explicit one's own hand recognition. Here...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-015-4210-3
更新日期:2015-04-01 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 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
abstract::Pieces of the developing cerebellar anlage were prepared from 13-15 day old rat embryos and transplanted to the cerebellar region of 5-7 and 13-14 day old rat pups. Approximately two months later, sections showed most grafts to consist of both cerebellar cortex, with a typical trilaminar organization, and white matter...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00237288
更新日期:1984-01-01 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::Sensory experience during perinatal life and adulthood modifies physiological and anatomical characteristics of the central nervous system. So far, this phenomenon has been studied in situations of complete or partial sensory deprivation. We here report that increased sensory stimulation, during four days, of a number...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00230256
更新日期:1989-01-01 00:00:00
abstract::The aim of this study was to examine effects of different types of task constraints on coupling of perception and action in people with chronic stroke when crossing obstacles during a walking task. Ten participants with hemiplegic chronic stroke volunteered to walk over a static obstacle under two distinct task constr...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-017-4920-9
更新日期:2017-06-01 00:00:00
abstract::In a choice reaction time (RT) paradigm, providing partial advance information (a precue) about the upcoming response has been shown to decrease RT, presumably due to preprogramming of the precued parameters. When advance information about a particular aspect of a movement is provided (precued), several different stra...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-011-2893-7
更新日期:2011-12-01 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::The human visual system is strikingly insensitive to speed changes attributed to the need to infer visual acceleration, observed during stationary fixation, indirectly by comparing velocities integrated over time. The objective of this study was to test if smooth pursuit eye movements improve the detection of speed ch...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-005-0216-6
更新日期:2006-04-01 00:00:00
abstract::Pyramidal cell structure varies systematically in occipitotemporal visual areas in monkeys. The dendritic trees of pyramidal cells, on average, become larger, more branched and more spinous with progression from the primary visual area (V1) to the second visual area (V2), the fourth (V4, or dorsolateral DL visual area...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-005-0057-3
更新日期:2005-12-01 00:00:00
abstract::This study employed neurophysiological methods to relate the condition of the corticospinal system with the voluntary control of lower-limb muscles in persons with motor-incomplete spinal cord injury. It consisted of two phases. In a group of ten healthy subjects, single and paired transcranial magnetic stimulation (T...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-004-2190-9
更新日期:2005-06-01 00:00:00
abstract::Corticofugal influence upon lateral geniculate units was evaluated by inactivating the visual cortex with a topical application of 3M KCL in rabbits. The results revealed a decrease of spontaneous firing in slow P cells following cortical depression suggesting a tonic corticofugal influence. The most consistently obse...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00236189
更新日期:1977-09-28 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::It is a conservative and reasonable suggestion that implicit functioning, as in blindsight, is simply a weakened, degraded form of normal functioning, especially as the parameters of vision in blindsight are themselves weakened--e.g., acuity is reduced, detection thresholds are raised, chromatic discrimination is coar...
journal_title:Experimental brain research
pub_type: 杂志文章,评审
doi:10.1007/s00221-008-1388-7
更新日期:2009-01-01 00:00:00
abstract:PURPOSE:To examine the accuracy and latency of reflexive saccades to vibratory stimulation of the fingertips made by normal human subjects and to compare the findings to those of visually guided saccades. METHODS:Eye movements were recorded using infrared oculography. Stimuli were presented via an array of audiometric...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-003-1749-1
更新日期:2004-02-01 00:00:00
abstract::The postnatal development of monoamine levels and receptors in the occipital cortex of the cat has been investigated using neurochemical techniques. The endogenous catecholamines (noradrenaline and dopamine) gradually increased with age, displaying an about 12-13-fold increase in their concentration from the newborn t...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00239212
更新日期:1983-01-01 00:00:00
abstract::We have investigated the effects of mental set on predictive capabilities using a saccade square-wave tracking paradigm with ten normal subjects, comparing three amplitudes (10, 20, and 40 degrees ) and five inter-stimulus intervals (ISIs) (400, 500, 625, 1000, and 2000 ms). Subjects were instructed simply to "follow ...
journal_title:Experimental brain research
pub_type: 临床试验,杂志文章
doi:10.1007/s00221-005-2317-7
更新日期:2005-09-01 00:00:00
abstract::Rats with unilateral or bilateral partial section of the fornix were impaired on an eight arm radial maze task. Neurochemical analysis of hippocampal tissue four weeks after the lesions revealed a 50% reduction of choline acetyltransferase (ChAT) activity. The cholinergic marker was correlated negatively with the numb...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00229009
更新日期:1992-01-01 00:00:00
abstract::Recent studies have shown that responses to surface galvanic vestibular stimulation (GVS) show substantial interindividual variation. Between-subject variability may be due to individual differences between subjects, or to the poor reliability of the test, or to differences in test details, or to host factors. The aim...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-002-1038-4
更新日期:2002-05-01 00:00:00
abstract::The firing of tuberoinfundibular neurones antidromically identified as projecting to the median eminence was recorded during electrical stimulation of the preoptic and/or anterior hypothalamic areas (PO/AH) of the rostral hypothalamus. Parameters of stimulation were chosen which are known to cause increased secretion ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00237074
更新日期:1980-01-01 00:00:00
abstract::The present study was conducted to visualize the ultrastructural features of vestibular efferent boutons in the oyster toadfish, Opsanus tau. The crista ampullaris of the horizontal semicircular canal was processed for and examined by routine transmission electron microscopy. The results demonstrate that such boutons ...
journal_title:Experimental brain research
pub_type: 更正并重新发布的文章,杂志文章
doi:10.1007/s00221-004-1898-x
更新日期:2004-07-01 00:00:00
abstract::Cell responses to complex visual patterns such as compositions of broad-band (non-monochromatic) colour areas are presented. Patterns were scanned over the receptive field, and cell response at each point was recorded. "Response patterns" were constructed which display the cell transform of the stimulus pattern. Parvo...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00239571
更新日期:1982-01-01 00:00:00
abstract::Lateral and medial thalamus are traditionally thought to have separate roles in pain processing, with lateral lemniscal regions transmitting discriminative information about location and intensity, while medial nonspecific regions are involved in emotional responses. Contrary to this view, the present study shows that...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00228914
更新日期:1989-01-01 00:00:00
abstract::Motor learning in the vestibular system can be differentially obtained depending upon the context for which the vestibulo-ocular reflex (VOR) has been exposed. Manipulating head orientation relative to gravity is an example of a contextual cue that can elicit independent VOR gains. We were interested in examining rete...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-008-1289-9
更新日期:2008-05-01 00:00:00
abstract::Microinjections of D,L homocysteic acid (DLH, 40 nmoles) made in the lateral PAG of the unanesthetized and paralyzed decerebrate cat evoked distinct patterns of extracranial and hindlimb blood flow. One pattern, evoked from the pretentorial part of the lateral PAG (A3.3-A2.5), consisted of an extracranial vasodilation...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00230972
更新日期:1991-01-01 00:00:00
abstract::A wealth of evidence describes the strong positive impact that reward has on motor control at the behavioural level. However, surprisingly little is known regarding the neural mechanisms which underpin these effects, beyond a reliance on the dopaminergic system. In recent work, we developed a task that enabled the dis...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-020-05802-1
更新日期:2020-08-01 00:00:00