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Bls 1 frá 1339 niðurstöður
Neural field model of receptive field restructuring in primary visual cortex.
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Receptive fields (RF) in the visual cortex can change their size depending on the state of the individual. This reflects a changing visual resolution according to different demands on information processing during drowsiness. So far, however, the possible mechanisms that underlie these size changes
Influence of permanent magnetic field on tonic postural activity.
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Physiological responses during escape and non-escape from stress in field independent and field dependent subjects.
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Psychophysiological responses (GSP, GSR, heart rate and respiration) were monitored while the subjects viewed stressful stimuli. In balanced order the subjects were exposed to a condition in which they viewed the stimuli for 15 sec and a condition in which they could escape the stimulus. The
Evidence for a supplementary eye field.
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Electrical microstimulation and unit recording were performed in dorsomedial frontal cortex of four alert monkeys to identify an oculomotor area whose existence had been postulated rostral to the supplementary motor area. Contraversive saccades were evoked from 129 sites by stimulation. Threshold
[Organization of receptive fields of tonic and phasic neurons in cat pulvinar].
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The receptive fields of 26% out of 163 pulvinar neurons were characterized by phasic pattern of responses whereas those of 15% of neurons had tonic characteristics. The receptive fields of 59% of neurons consisted both of tonic and phasic subfields. These findings suggested convergence of two types
Open field behavior after chronic self stimulation.
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Long term exposure of adult male Sprague Dawley rats to rewarding brain stimulation produced alterations in open field behavior in comparison to nonstimulated controls. Initial activity was increased while movement latency was decreased for the experimental animals. Grooming and defecation were
Disparity sensitivity of frontal eye field neurons.
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Information about depth is necessary to generate saccades to visual stimuli located in three-dimensional space. To determine whether monkey frontal eye field (FEF) neurons play a role in the visuo-motor processes underlying this behavior, we studied their visual responses to stimuli at different
Receptive field structure of burst and tonic firing in feline lateral geniculate nucleus.
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There are two recognised modes of firing activity in thalamic cells, burst and tonic. A low-threshold (LT) burst (referred to from now on as 'burst') comprises a small number of high-frequency action potentials riding the peak of a LT Ca(2+) spike which is preceded by a silent hyperpolarised state >
Tonic arousal during field polygraph tests in guilty vs. innocent suspects in Japan.
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Eighty four sets of GKT field data (52 guilty and 32 innocent persons) were analyzed for tonic level of heart rate and respiration rate during polygraph interrogation. The innocent persons in our sample showed consistently lower heart rate than guilty persons and revealed significant decrease over
Chronic exposure to ELF fields may induce depression.
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Exposure to extremely-low-frequency (ELF) electric or magnetic fields has been postulated as a potentially contributing factor in depression. Epidemiologic studies have yielded positive correlations between magnetic- and/or electric-field strengths in local environments and the incidence of
Magnetic fields alter the circadian periodicity of seizures.
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We have recently reported that application of external, weak magnetic fields attenuated seizures in epileptic patients (Anninos et al., 1991). However, the mechanisms by which magnetic stimulation reduces seizure activity are unknown. We present four non-selected epileptic patients the first to be
Stereotactic fields of Forel interruption for intractable epilepsy.
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Bilateral stereotactic fields of Forel surgery was carried out in 6 adults with chronic intractable epilepsy associated with multifocal EEG abnormalities. During an average 40 months follow-up, a significant reduction in the frequency of generalized tonic-clonic seizures was noted in 4 patients.
Selection of speech messages in free-field listening.
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Event-related brain potentials (ERPs) elicited by initial consonants of words in a spoken message were recorded from 10 human subjects. In an ecologically valid free-field situation, brain responses to speech were recorded for the first time without using artificial probe stimuli as ERP trigger
A screening questionnaire for generalized tonic-clonic seizures: Hospital-based validation vs field-validation method.
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The majority of the screening questionnaires for epilepsy have been validated in hospital settings. We previously developed and used for field validation a screening tool to detect generalized tonic-clonic seizures (GTCS) in the rural communities of the Chaco region of Bolivia. The objective of the
Tonic Immobility and Open Field Responses in Nagoya, White Leghorn, and White Plymouth Rock Chicks
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Innate fear responses to tonic immobility (TI) and open field (OF) were evaluated in newly hatched chicks of three breeds with distinct breed origin and genetic relationships. The breeds studied were Nagoya (NAG), a native Japanese breed; White Leghorn (WL), a representative of layers; and White
Heillasta gagnagrunnur lækningajurtanna sem studdur er af vísindum
- Virkar á 55 tungumálum
- Jurtalækningar studdir af vísindum
- Jurtaviðurkenning eftir ímynd
- Gagnvirkt GPS kort - merktu jurtir á staðsetningu (kemur fljótlega)
- Lestu vísindarit sem tengjast leit þinni
- Leitaðu að lækningajurtum eftir áhrifum þeirra
- Skipuleggðu áhugamál þitt og vertu vakandi með fréttarannsóknum, klínískum rannsóknum og einkaleyfum
Sláðu inn einkenni eða sjúkdóm og lestu um jurtir sem gætu hjálpað, sláðu jurt og sjáðu sjúkdóma og einkenni sem hún er notuð við.
* Allar upplýsingar eru byggðar á birtum vísindarannsóknum
