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Dissociable Effects of Cocaine Dependence on Reward Processes: The Role of Acute Cocaine and Craving.

The relative impact of chronic vs acute cocaine on dependence-related variability in reward processing in cocaine-dependent individuals (CD) … frontal gyrus post-saline. Across outcomes (ie, successful and unsuccessful) activity in the right habenula decreased in CD in the abstinence/saline condition vs acute cocaine and HC. Cocaine-dependent variability in outcome- and loss-magnitude activity correlated negatively with ratings of cocaine craving and positively with how high subjects felt during …

Brain-Wide Connectivity of GLP1R Neurons in the Thalamic Reticular Nucleus.

BACKGROUND: Glucagon-like peptide-1 receptor (GLP1R) is a G-protein-coupled receptor recognized for its essential role in metabolic homeosta … leus (VM), paracentral thalamic nucleus (PC), mediodorsal thalamus, lateral part (MDL), and lateral habenula (LHb) nuclei. CONCLUSIONS: The results confirm the existence of complex long-range afferent and efferent circuits associated with TRNGLP1R neurons, providing a morphological basis for studying their role in integrating metabolic states with sensory …

Dopamine D1-D2 receptor heteromer expression in key brain regions of rat and higher species: Upregulation in rat striatum after cocaine administration.

BACKGROUND: Dopamine receptors interact with other receptors to form heterooligomers. One such complex, the D1-D2 heteromer, demonstrated in … l prefrontal, orbitofrontal and others; subcortical regions such as claustrum, amygdala and lateral habenula. Three categories of regions are identified: D1-D2 heteromer expressed despite little to no observed D1/D2 mRNA colocalization, likely representing heteromer on neuronal projections from other brain regions; D1-D2 heteromer originating locally with …

Intracranial physiological calcifications evaluated with cone beam CT.

OBJECTIVES: The purpose of this study was to evaluate cone beam CT (CBCT) scans for the presence of physiological and pathological intracran … ears to 82 years with a mean age of 52 years. The majority of calcifications appeared in the pineal/habenular region (80%), with some also appearing in the choroid plexus region bilaterally (12%), and a smaller subset appearing in the petroclinoid ligament region bilaterally (8%). CONCLUSIONS: Intracranial physiological calcifications can be a common find …

Neuronal dysfunction of a long projecting multisynaptic pathway in response to methamphetamine using manganese-enhanced MRI.

RATIONALE: Manganese (Mn2+)-enhanced magnetic resonance imaging (MEMRI) is an emerging in vivo MR approach for pharmacological research. One … mg/kg) or saline every 2 h for a total of four injections. After 6 days, Mn2+ was injected into the habenular nucleus (FR origin) of all animals, and MEMRI was repeatedly performed at certain points in time over 48 h. The evolution of Mn2+-induced signal enhancement was assessed across the FR tract, the ventral tegmental area (VTA), the striatum, the nucle …

Trace Amine-Associated Receptor 2 Is Expressed in the Limbic Brain Areas and Is Involved in Dopamine Regulation and Adult Neurogenesis.

Trace amines are a group of biogenic amines that are structurally and functionally close to classical monoamine neurotransmitters. Trace ami … veral brain regions, including the hippocampus, cerebellum, cortex, raphe nuclei, hypothalamus, and habenula, indicating that TAAR2 receptors are not only expressed in the olfactory system but are also present in the limbic brain areas that receive olfactory input. In behavioral experiments, TAAR2 knock-out (TAAR2-KO) mice showed increased locomotor activi …

Visual system of a naturally microphthalmic mammal: the blind mole rat, Spalax ehrenbergi.

Retinal projections and visual thalamo-cortical connections were studied in the subterranean mole rat, belonging to the superspecies Spalax … e, the paraventricular hypothalamic nucleus, the anteroventral and anterodorsal nuclei, the lateral habenula, the mediodorsal nucleus, and the basal telencephalon.(ABSTRACT TRUNCATED AT 400 WORDS)

Histochemical distribution of zinc in the brain of the zebra finch (Taenopygia guttata).

The distribution of zinc was studied in the brain of the zebra finch (Taenopygia guttata) by means of the selenium histochemical method. A s … o moderately stained, with the exception of a few unstained nuclei. Only the lateral nucleus of the habenula was stained, and with strong intensity. Most of the mesencephalon stained rather uniformly with a moderate to strong intensity. The most intense staining was seen in the substantia grisea centralis, the substantia grisea et fibrosa periventricularis …

Distribution of GABA-immunoreactive neurons in the thalamus of the squirrel monkey (Saimiri sciureus).

A light microscopic study of the cellular localization of GABA in the thalamus of the squirrel monkey (Saimiri sciureus) was undertaken by m … l bodies and terminals abounded particularly within the ventromedial third of the structure. In the habenula, a few GABA-immunoreactive cell bodies and numerous GABA-positive terminals were scattered throughout the lateral habenular nucleus, whereas only a few GABA-immunoreactive terminals surrounded the closely packed unreactive cells in the medial habenu …

Mediator subunit 12 coordinates intrinsic and extrinsic control of epithalamic development.

In the developing brain, the production of neurons from multipotent precursors must be carefully regulated in order to generate the appropri … erentiates early and rapidly in the zebrafish. It includes the pineal and parapineal organs and the habenular nuclei. Mutation of the Mediator complex subunit Med12 impairs the specification of habenular and parapineal neurons and causes a loss of differentiation in pineal neurons and photoreceptors. Although FGF ligands and transcription factors for parap …

Expression of the neuropeptide Y Y1 receptor in the CNS of rat and of wild-type and Y1 receptor knock-out mice. Focus on immunohistochemical localization.

The distribution of neuropeptide Y (NPY) Y1 receptor-like immunoreactivity (Y1R-LI) has been studied in detail in the CNS of rat using a rab … of Calleja, the anterior olfactory nucleus, the molecular layer of the dentate gyrus, parts of the habenula, the interpeduncular nucleus, the mammillary body, the spinal nucleus of the trigeminal, caudal part, the paratrigeminal nucleus, and superficial layers of the dorsal horn. High levels were found in most cortical areas, many thalamic nuclei, some su …

Neuropilin-2 regulates the development of selective cranial and sensory nerves and hippocampal mossy fiber projections.

Neuropilin-1 and neuropilin-2 bind differentially to different class 3 semaphorins and are thought to provide the ligand-binding moieties in receptor complexes mediating repulsive responses to these semaphorins. Here, we have studied the function of neuropilin-2 through analysis of a neuropilin-2 mutant mouse, which is viable and fertile. Repulsive responses of sympathetic and hippocampal neurons to Sema3F but not to Sema3A are abolished in the mutant. Marked defects are observed in the development of several cranial nerves, in the initial central projections of spinal sensory axons, and in th

Zebrafish Cdx1b modulates epithalamic asymmetry by regulating ndr2 and lft1 expression.

Nodal signaling is essential for mesoderm and endoderm formation, as well as neural plate induction and establishment of left-right asymmetr … cephalon during segmentation and pharyngula stages accompanied by aberrant parapineal migration and habenular laterality at 72 ​h post fertilization (hpf). These defects were less frequent in embryos injected with splicing-blocking MO. To confirm the morphant phenotype, we next generated both zygotic (Z)cdx1b-/- and maternal zygotic (MZ)cdx1b-/- mutants by …

Thalamic nuclei atrophy at high and heterogenous rates during cognitively unimpaired human aging.

The thalamus is a central integration structure in the brain, receiving and distributing information among the cerebral cortex, subcortical … 10 thalamic nuclei (AV, CM, VA, VLA, VLP, VPL, pulvinar, LGN, MGN, MD) and an epithalamic nucleus (habenula). We also used T1-weighted images with the FreeSurfer SAMSEG segmentation method to identify and measure age-related atrophy for 11 extra-thalamic structures (cerebral cortex, cerebral white matter, cerebellar cortex, cerebellar white matter, amygda …

Neuropilin-2 is required in vivo for selective axon guidance responses to secreted semaphorins.

Neuropilins are receptors for class 3 secreted semaphorins, most of which can function as potent repulsive axon guidance cues. We have generated mice with a targeted deletion in the neuropilin-2 (Npn-2) locus. Many Npn-2 mutant mice are viable into adulthood, allowing us to assess the role of Npn-2 in axon guidance events throughout neural development. Npn-2 is required for the organization and fasciculation of several cranial nerves and spinal nerves. In addition, several major fiber tracts in the brains of adult mutant mice are either severely disorganized or missing. Our results show that N

A nodal signaling pathway regulates the laterality of neuroanatomical asymmetries in the zebrafish forebrain.

Animals show behavioral asymmetries that are mediated by differences between the left and right sides of the brain. We report that the laterality of asymmetric development of the diencephalic habenular nuclei and the photoreceptive pineal complex is regulated by the Nodal signaling pathway and by midline tissue. Analysis of zebrafish embryos with compromised Nodal signaling reveals an early role for this pathway in the repression of asymmetrically expressed genes in the diencephalon. Later signaling mediated by the EGF-CFC protein One-eyed pinhead and the forkhead transcription factor Schmalsp…

Distribution and properties of GABA(B) antagonist [3H]CGP 62349 binding in the rhesus monkey thalamus and basal ganglia and the influence of lesions in the reticular thalamic nucleus.

GABA(B) receptors are believed to be associated with the efferents of the nucleus reticularis thalami, which is implicated in the regulation of activity in the thalamocortical-corticothalamic circuit and plays a role in absence seizures. Yet, the distribution of GABA(B) receptors in the thalamus has only been studied in the rat, and there is no comparable information in primates. The potent GABA(B) receptor antagonist [3H]CGP 62349 was used to study the distribution and binding properties of the receptor in control monkeys and those with small ibotenic acid lesions in the anterodorsal segment

Forebrain afferents to the rat dorsal raphe nucleus demonstrated by retrograde and anterograde tracing methods.

The dorsal raphe nucleus through its extensive efferents has been implicated in a great variety of physiological and behavioural functions. … ent with previous studies, we observed a large number of retrogradely-labelled cells in the lateral habenula following injections in all subdivisions of the dorsal raphe nucleus. In addition, depending on the subdivision of the dorsal raphe nucleus injected, we observed a small to large number of retrogradely-labelled cells in the orbital, cingulate, infra …

Новое понимание механизма нейрохимического несбалансированности при множественном склерозе: ненормальный перенос внеклеточного пространства мозга.

Нейрохимический дисбаланс является фактором, способствующим возникновению неврологических симптомов при множественном склерозе (МС). Взрослая милиновая оболочка имеет решающее значение для транспортировки веществ в внеклеточном пространстве (ЭКС) и для поддержания местного гомеостаза. Поэтому мы предположим, что нарушение переноса ЭКС после демиелионирующих повреждений может привести к нейрохимическому дисбалансу в MS. В рамках нынешнего исследования для изучения пространственных нейрохимических изменений использовалась односторонняя модель MS, вызванная лизофосфатидилхолином. Результаты показ

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… For instance, optogenetic studies have demonstrated that the inhibition of the TRN to the lateral habenula circuit induces depressive-like behaviors [ 29 ], highlighting the TRN's role in mood regulation. …

Иммунитет в нейромодуляции: исследование нейронных и иммунных путей в расстройствах мозга.

Иммунитет четко регулирует функцию мозга. Она непосредственно участвует в патологических процессах таких нейродегенеративных заболеваний, как болезнь Паркинсона и Альцгеймера, посттравматические заболевания, множественный склероз, травма головного мозга и психические расстройства (большое расстройство организма, серьезное депрессивное расстройство (МДС), расстройства тревожности, расстройства психоза и шизофрения, а также расстройства нервного развития (НРД). Нейромодулирование в настоящее время является одной из ведущих терапевтических стратегий лечения этих расстройств, однако пока мало что

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… amyloid plaque and cognitive deficits [ 35 ]), (2) intermittent theta-burst stimulation (iTBS) treatment in the hippocampus and periventricular area of an AD mouse model injected intracerebroventricularly with streptozotocin (STZ) and showing mild reactive microgliosis in the dorsal hippocampus, medial habenula …