Search results for " long-term potentiation"

showing 3 items of 3 documents

TMS activation of interhemispheric pathways between the posterior parietal cortex and the contralateral motor cortex

2016

Using a twin coil transcranial magnetic stimulation (tc-TMS) approach we have previously demonstrated that facilitation may be detected in the primary motor cortex (M1) following stimulation over the ipsilateral caudal intraparietal sulcus (cIPS). Here we tested the interhemispheric interactions between the IPS and the contralateral motor cortex (M1). We found that conditioning the right cIPS facilitated contralateral M1 when the conditioning stimulus had an intensity of 90% resting motor threshold (RMT) but not at 70% or 110% RMT. Facilitation was maximal when the interstimulus interval (ISI) between cIPS and M1 was 6 or 12 ms. These facilitatory effects were mediated by interactions with …

AdultMalePhysiologyLong-Term Potentiationrhesus monkeyhuman corpus-callosumNONeural Pathwayanterior intraparietal areaParietal LobeNeural PathwaysHumansworld monkeysNeuronal PlasticityMotor Cortexdorsal premotorconnectionsTranscranial Magnetic StimulationinhibitionTranscranial magnetic stimulation; anterior intraparietal area; human corpus-callosum; dorsal premotor; online adjustments; rhesus monkey; world monkeys; humans; connections; inhibition; TMSparietal cortexinterhemisphericTMSonline adjustmentsFemaleSettore MED/26 - NeurologiaMotor Cortex; Humans; Neural Pathways; Adult; Neuronal Plasticity; Transcranial Magnetic Stimulation; Parietal Lobe; Long-Term Potentiation; Nerve Net; Male; FemaleNerve NetNeuroscienceHuman
researchProduct

Specific Hippocampal Interneurons Shape Consolidation of Recognition Memory

2020

Summary A complex array of inhibitory interneurons tightly controls hippocampal activity, but how such diversity specifically affects memory processes is not well understood. We find that a small subclass of type 1 cannabinoid receptor (CB1R)-expressing hippocampal interneurons determines episodic-like memory consolidation by linking dopamine D1 receptor (D1R) signaling to GABAergic transmission. Mice lacking CB1Rs in D1-positive cells (D1-CB1-KO) display impairment in long-term, but not short-term, novel object recognition memory (NOR). Re-expression of CB1Rs in hippocampal D1R-positive cells rescues this NOR deficit. Learning induces an enhancement of in vivo hippocampal long-term potenti…

MaleAnimals CB1 receptor D1 receptor Dopamine Endocannabinoid system GABA Hippocampus Interneurons Long-term potentiation Male Memory Mice Novel object recognition Recognition PsychologyCB1 receptorCB1 cannabinoid receptorsD(1) receptorhippocampus[SDV]Life Sciences [q-bio]D1 receptorneuronsCB(1) receptorArticleCA1informationMiceGABAMemoryAnimalsendocannabinoid systemlong-term potentiationinterneuronsmusculoskeletal neural and ocular physiologyRecognition Psychologyepisodic memoryinhibition[SDV] Life Sciences [q-bio]modulationnervous systemdopamineLTPnovel object recognition memory
researchProduct

ADIPOSE TISSUE-TARGETED STEM CELL TRANSPLANTATION FOR INSULIN RESISTANCE-RELATED CNS DEFICITS

Compelling evidence indicates that Type 2 Diabetes (T2D) and Alzheimer’s Disease (AD) may possibly share a common pathological origin, but the underlying mechanisms remain poorly understood. T2D is a known risk factor for AD and insulin resistance (hallmark of T2D) has been extensively documented in AD patients. Notably, insulin is important for learning and memory due to its role in LTP and LTD modulation. Adipose tissue (AT) dysfunction is a risk factor for T2D, in fact elevated levels of free fatty acids are prodromal to insulin resistance and have been reported in AD brains, as well. In this study, I used a mouse model (AtENPP1Tg mouse) that recapitulates typical characteristics of huma…

Settore BIO/17 - Istologiainsulin resistance cognitive declince CNS deficits mesenchymal stem cells adipose tissue long-term potentiation glucose tolerance
researchProduct