نتایج جستجو برای: somatosensory cortex

تعداد نتایج: 149948  

Journal: :physiology and pharmacology 0
vahid sheibani akerman neuroscience research center, kerman university of medical sciences, kerman, iran sahel motaghi rasool farazifard hossein joneidi mohammad reza afarinesh

introduction: it is believed that locus coeruleus (lc) influences the sensory information processing. however, its role in cortical surround inhibitory mechanism is not understood. in this experiment, using controlled mechanical displacement of whiskers we investigated the effect of phasic electrical stimulation of lc on response of layer v barrel cortical neurons in anesthetized rat. methods: ...

سدویک، وی چی, ای - ام, ویراسینگه, ,

An early component of the somatosensory evoked potential, arising from the primary sensory cortex in man is attenuated during voluntary finger movement. The median nerve at the wrist was stimulated while the subject performed fractionated finger movements with the same hand. Subcortical components of the somatosensory evoked potential were not changed but the P25 cortical component was attenuat...

Journal: :iranian biomedical journal 0
محمود سلامی mahmoud salami fumitaka kimura tadaharu tsumoto

change in transmitting time of impulses along axons is traditionally attributed to two parameters: the myelin formation and the diameter of neurite, both rising during the postnatal development. in the previous study, we showed that conduction velocity of the fibers projecting from the thalamus to the layer iv of the somatosensory (barrel) cortex increases as a function of age. however, the con...

  Although each subdivision of primary somatosensory cortex (SI) receives dense input from the thalamus, but the exact location and type of information that the fibers convey have not been identified yet. In the present study, the exact source of thalamocortical fibers to areas 2 and 3b was investigated using tract-tracing techniques. Following injection of tracer into area 3b, labeled neurons ...

Journal: :iranian journal of basic medical sciences 0
esmaeal tamaddonfard department of basic sciences, faculty of veterinary medicine, urmia university, urmia, iran nasrin hamzeh gooshchi faculty of veterinary medicine, urmia university, urmia, iran

objective(s): the present study investigated the effects of microinjection of histamine and histamine h1, h2, and h3 receptor antagonists, chlorpheniramine, ranitidine and thioperamide, respectively into the primary somatosensory cortex (psc) on inflammatory pain.   material and methods: two stainless steel guide canulas were bilaterally implanted into the psc of anaesthetized rats. inflammator...

Abbas Haghparast, Abdolrahman Sarihi, Alireza Komaki, Iraj Salehi, Parisa Hasanein, Reza Lashgari, Siamak Shahidi,

Introduction: The primary somatosensory cortex has an important role in nociceptive sensory-discriminative processing. Altered peripheral inputs produced by deafferentation or by long-term changes in levels of afferent stimulation can result in plasticity of cortex. Capsaicin-induced depletion of C-fiber afferents results in plasticity of the somatosensory system. Plasticity includes short-term...

Journal: :iranian journal of medical sciences 0
chengdong yuan guizhou key laboratory of anesthesia and organ protection, zunyi medical college, guizhou, china yajun zhang guizhou key laboratory of anesthesia and organ protection, zunyi medical college, guizhou, china yu zhang guizhou key laboratory of anesthesia and organ protection, zunyi medical college, guizhou, china song cao guizhou key laboratory of anesthesia and organ protection, zunyi medical college, guizhou, china yuan wang guizhou key laboratory of anesthesia and organ protection, zunyi medical college, guizhou, china bao fu guizhou key laboratory of anesthesia and organ protection, zunyi medical college, guizhou, china

background: ketamine is a commonly used intravenous anesthetic which produces dissociation anesthesia, analgesia, and amnesia. the mechanism of ketamine-induced synaptic inhibition in high-level cortical areas is still unknown. we aimed to elucidate the effects of different concentrations of ketamine on the glutamatergic synaptic transmission of the neurons in the primary somatosensory cortex b...

Journal: :Scientific Reports 2021

Abstract The neural representation of the body is easily altered by integration multiple sensory signals in brain. “rubber hand illusion” (RHI) one most popular experimental paradigms to investigate this phenomenon. During illusion, a feeling ownership rubber created. Some studies have shown that somatosensory processing brain attenuated when RHI occurs. However, it unknown where attenuation He...

2001
Vadim V. Nikouline Benjamin Franklin

.......................................................................................................................... 6 Introduction ................................................................................................................... 7 Review of literature ..................................................................................................... 8 Oscillatory brai...

2014
Clemens C. C. Bauer Fernando A. Barrios José-Luis Díaz

In order to explore the neurobiological foundations of qualitative subjective experiences, the present study was designed to correlate objective third-person brain fMRI measures with subjective first-person identification and scaling of local, subtle, and specific somatosensory sensations, obtained directly after the imaging procedure. Thus, thirty-four volunteers were instructed to focus and s...

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