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Neuron Production, Neuron Number, and Structure Size Are
Neuron Production, Neuron Number, and Structure Size Are

... To estimate the number of new neurons in the hippocampus and in the four control regions of the brain, we examined all sections labeled for BrdU (mean of 7.5 sections per bird) and counted all new neurons appearing in that brain region according to the morphological criterion of Gould et al. (1999; ...
Shootin1 - The Journal of Cell Biology
Shootin1 - The Journal of Cell Biology

... Banker, 1989). This observation led to the proposal that a positive feedback loop and negative regulation among neurites are necessary for neuronal polarization (Goslin and Banker, 1989; Andersen and Bi, 2000; Banker, 2003). A locally acting positive feedback loop may amplify a small stochastic incr ...
nerve supply of pelvic viscera — anatomical notes, clinical
nerve supply of pelvic viscera — anatomical notes, clinical

... An understanding of the detailed anatomy of the pelvic sympathetic and parasympathetic nervous supply to pelvic viscera is essential in any consideration of function. Anatomy of human pelvic nerve plexuses still remains not very clear. The inferior mesenteric plexus is a mixed autonomic plexus which ...
Chapter_013
Chapter_013

... Synthesizes hormones secreted by posterior pituitary and plays an essential role in maintaining water balance ...
Chapter_013
Chapter_013

... Synthesizes hormones secreted by posterior pituitary and plays an essential role in maintaining water balance ...
Full Text
Full Text

... Rapgef2-cKO affects late-born neurons only, Rapgef2/6-dKO affects both early-born and late-born neurons. The Rapgef2-cKO cortex at embryonic day (E) 15.5, and the Rapgef2/6-dKO cortex at E13.5 and E15.5 show disruption of the adherens junctions (AJs) on the apical surface, detachment of radial glial ...
chapter 4 the evolution of body, brain, behavior, and mind in
chapter 4 the evolution of body, brain, behavior, and mind in

... are interconnected by way of a meshwork of vertically aligned bipolar cells and horizontally oriented amacrine cells, and there is a layer of ganglion cells whose axons form the optic nerve (Dowling, 1968; Fig. 4-5B). The processing of visual input begins at the retinal level where many ganglion cel ...
Drosophila GABA, short neuropeptide F and their receptors
Drosophila GABA, short neuropeptide F and their receptors

... homeostasis, the organism utilizes internal cues. For example, there are 20 neurons in the subesophageal ganglion (SOG) that contain the neuropeptide gene hugin. The hugin expressing cells connect to higher brain circuits that regulate feeding behaviour. Branches of the hugin expressing cells are fo ...
Article  - Dynamic Connectome Lab
Article - Dynamic Connectome Lab

... neuronal dynamics, including optical imaging methods (voltage-sensitive dye imaging, calcium imaging, intrinsic signal optical imaging), intracellular electrode recordings of individual neurons, and extracellular recordings using single or multiple electrodes (Brette and Destexhe 2012). While each m ...
Latest Findings in the Mechanisms of Cortical `Arousal`: `Enabling
Latest Findings in the Mechanisms of Cortical `Arousal`: `Enabling

... As part of a one-two arousal punch for this dorsal extension, the brainstem acetylcholine projection to another thalamic fixture is crucial for normal waking arousal. Surrounding much of each of the two thalami is a net-like covering called the reticular (net-like) nucleus of the thalamus (RNT), thr ...
Neural Control of the Pancreas
Neural Control of the Pancreas

... and acini. These differences in the innervation of various portions of the pancreas are evident following sympathetic nerve activation, as sympatho-activation decreases insulin secretion and results in vasoconstriction, while it has little or no effect on ductal and acinar cell secretions. The princ ...
Ch. 49
Ch. 49

... • The core of the brainstem has a diffuse network of neurons called the reticular formation • This regulates the amount and type of information that reaches the cerebral cortex and affects alertness • The hormone melatonin is released by the pineal gland and plays a role in bird and mammal sleep cyc ...
Latest Findings in the Mechanisms of Cortical `Arousal`: `Enabling
Latest Findings in the Mechanisms of Cortical `Arousal`: `Enabling

... As part of a one-two arousal punch for this dorsal extension, the brainstem acetylcholine projection to another thalamic fixture is crucial for normal waking arousal. Surrounding much of each of the two thalami is a net-like covering called the reticular (net-like) nucleus of the thalamus (RNT), thr ...
Imitation, Empathy, and Mirror Neurons
Imitation, Empathy, and Mirror Neurons

... not based on dedicated functional (and neural) mechanisms. General sensory and motor systems may implement imitative abilities through mechanisms that are strongly reminiscent of Hebbian learning. One of the corollaries of this assumption is that imitation should not be confined to specific lineages. ...
Powerpoint Slides for chapter 2
Powerpoint Slides for chapter 2

... • Receptors are specialized cells of the nervous system that sense stimuli. • The second activity in the chain is interpreting, or processing, the information that reaches the receptors. • This processing typically takes place in the brain. ...
IBRO 2008
IBRO 2008

... Adenylyl cyclases (ACs) synthesize the intracellular messenger cyclic adenosine 3’5’monophosphate (cAMP). Vertebrate genomes have 10 genes of AC, 9 of these are membrane-bound whilst there is a single soluble enzyme. All membrane-bound ACs are expressed in the brain and the presence of several AC pa ...
cur op e-print version
cur op e-print version

... significant effect of ovarian hormones on the reward effectiveness of lateral hypothalamic stimuluation [7*], the size of this effect is very small. Indeed, the shifts in the representative reward-summation functions shown fall well within the range of variation used as the criterion for within-sess ...
GAP-43 Expression in Primary Sensory Neurons following Central
GAP-43 Expression in Primary Sensory Neurons following Central

... Copyright 0 1994 Society for Neuroscience 0270-6474/94/144375-10$05.00/O ...
Brainstem Afferents of the Cholinoceptive Pontine Wave Generation
Brainstem Afferents of the Cholinoceptive Pontine Wave Generation

... 1980; Steinbusch and Nieuwehuys, 1983). Inputs from both cholinergic and aminergic cells to the P-wave generation site are significant, because they provide anatomical evidence for a recent model of REM sleep generation which proposes that the activation of brainstem cholinergic cells and inactivati ...
Impaired odour discrimination on desynchronization of odour
Impaired odour discrimination on desynchronization of odour

... 20–35 Hz local field potential (LFP) oscillations in their target area, the calyx of the mushroom body5. Each successive cycle of the odour-evoked oscillatory LFP can therefore be characterized by a co-active subset of projection neurons, and an odour is thus represented by a specific succession of ...
Gao JCN 2000 - Georgia State University
Gao JCN 2000 - Georgia State University

... RESULTS Results obtained from a qualitative analysis of the distribution and morphology of PV- and CB-immunopositive neurons are presented here first, followed by a quantitative analysis of their density and proportion. ...
neural projections from nucleus accumbens to globus pallidus
neural projections from nucleus accumbens to globus pallidus

... electrophysiological recordings were made from single neurons in these regions to map the location of units that respond to electrical stimulation of the nucleus accumbens. Recordings also were made from neurons in dorsal parts of the GP (GPd) before the microelectrode was lowered to the GP, and the ...
Collateral projections from the median raphe nucleus to the medial
Collateral projections from the median raphe nucleus to the medial

... ABSTRACT: It has previously been shown that the median raphe nucleus (MR) is a source of pronounced projections to the septum and hippocampus. The present study examined collateral projections from MR to the medial septum (MS) and to various regions of the hippocampus. The fluorescent retrograde tra ...
Physiological Psychology - II Sem
Physiological Psychology - II Sem

... neurotransmitter molecules, which bind to chemical receptor molecules located in the membrane of the target cell. Most neurons send signals via their axons, although some types are capable of dendrite-to-dendrite communication. (In fact, the types of neurons called amacrine cells have no axons, and ...
Stimulation Within the Rostral Ventrolateral Medulla Can Evoke
Stimulation Within the Rostral Ventrolateral Medulla Can Evoke

... of the ipsilateral segmental ventral root and their morphology and location in the intermediolateral cell column and intercalated nucleus. In all SPNs, electrical stimulation of the RVLM evoked fast excitatory postsynaptic potentials (EPSPs) that were mediated by non-N-methyl-D-aspartate (NMDA) and ...
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Circumventricular organs

Circumventricular organs (CVOs) are structures in the brain that are characterized by their extensive vasculature and lack of a normal blood brain barrier (BBB). The CVOs allow for the linkage between the central nervous system and peripheral blood flow; additionally they are an integral part of neuroendocrine function. The lack of a blood brain barrier allows the CVOs to act as an alternative route for peptides and hormones in the neural tissue to the peripheral blood stream, while still protecting it from toxic substances. CVOs can be classified into (a) sensory and (b) secretory organs. The sensory organs include the area postrema (AP), the subfornical organ (SFO) and the vascular organ of lamina terminalis. They have the ability to sense plasma molecules and then pass that information into other regions of the brain. Through this, they provide direct information to the autonomic nervous system from the systemic circulation. The secretory organs include the subcommissural organ (SCO), the posterior pituitary, the pineal gland, the median eminence and the intermediate lobe of the pituitary gland. These organs are responsible for secreting hormones and glycoproteins into the peripheral vascular system using feedback from both the brain environment and external stimuli.All of the circumventricular organs, besides the SCO, contain extensive vasculature and fenestrated capillaries which leads to a ‘leaky’ BBB at the site of the organs. Furthermore, all CVOs contain neural tissue, allowing them to play a role in the neuroendocrine system. It is highly debated if the choroid plexus can be included as a CVO. It has a high concentration of fenestrated capillaries, but its lack of neural tissue and its primary role of producing cerebrospinal fluid (CSF) usually excludes the choroid plexus from the CVO classification.Research has also linked CVOs to body fluid regulation, cardiovascular functions, immune responses, thirst, feeding behavior and reproductive behavior.
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