Neural activity was recorded in the secondary somatosensory cortex (SII) of macaque monkeys during a simple feeding task. Around the border between the representations of the hand and face in SII, we found neurons that became active during both retrieving with the hand and eating; 59% had receptive fields (RFs) in the hand/face and the remaining 41% had no RFs. Neurons that responded to touching objects were rarely found. This suggests their sensorimotor function rather than tactile object recognition.
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http://dx.doi.org/10.3109/08990220.2013.779246 | DOI Listing |
Sci Rep
January 2025
Department of Biosciences, Universidade Estadual de Campinas (UNICAMP), Faculdade de Odontologia de Piracicaba (FOP), Piracicaba, Brazil.
This study compared the degree of secondary hyperalgesia and somatosensory threshold changes induced by topical capsaicin between spinal and trigeminal innervation. This crossover clinical trial included 40 healthy individuals in which 0.25 g of 1% capsaicin cream was randomly applied for 45 minutes to a circular area of 2 cm to the skin covering the masseter muscle and forearm in 2 different sessions, separated by at least 24 hours and no more than 72 hours (washout period).
View Article and Find Full Text PDFNeurobiol Dis
December 2024
Institute of Physiology I, Münster University, Münster, Germany. Electronic address:
Spike-wave-discharges (SWD) are the electrophysiological hallmark of absence epilepsy. SWD are generated in the thalamo-cortical network and a seizure onset zone was identified in the somatosensory cortex (S1). We have shown before that inhibition of the centromedian thalamic nucleus (CM) in GAERS rats resulted in a selective suppression of the spike component while rhythmic cortical 5-9 Hz oscillations remained present.
View Article and Find Full Text PDFbioRxiv
December 2024
Solomon H. Snyder Department of Neuroscience, Kavli Neuroscience Discovery Institute, Brain Science Institute, Johns Hopkins University School of Medicine, Baltimore, MD.
Somatosensory cortex activity relates both to sensation and movement, reflecting their intimate relationship, but the extent and nature of sensory-motor interactions in the somatosensory cortex remain unclear. Here, we investigated perception-related sensory and motor signals in the whisker areas of mouse primary (wS1) and secondary (wS2) somatosensory cortices. We recorded neuronal activity while mice performed a whisker detection task using two alternative lickports, one each to indicate the presence or absence of a whisker deflection on a given trial.
View Article and Find Full Text PDFACS Pharmacol Transl Sci
December 2024
Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States.
Acute cerebral ischemia is a leading cause of death and disability, particularly among old adults. The narrow therapeutic window and risk of hemorrhagic transformation largely limit patient eligibility for the current treatment. The neuroinflammatory signaling pathway involving the prostaglandin E2 (PGE) receptor subtype EP2 has now been clarified to contribute to the secondary neurotoxicity following ischemic stroke.
View Article and Find Full Text PDFJ Clin Med
November 2024
Klinik und Poliklinik für Psychiatrie und Psychotherapie der Universität Regensburg am Bezirksklinikum Regensburg, Universität Regensburg, 93053 Regensburg, Germany.
Somatic tinnitus (ST) is a type of tinnitus that is influenced by changes in somatosensory input from the cervical spine or temporomandibular area. Although traditional physiotherapy has been shown to reduce ST symptoms, in-clinic treatment is not always available, and adherence to home exercise programs is often low. This study aims to investigate the effectiveness of an app-based physiotherapy program to enhance the compliance and availability of treatment for ST patients.
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