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Sleep Physiology
Sleep Physiology

... b. Sensory stimuli will be absent so that it is difficult to arouse through touch, sound or light stimuli. c. The spinal muscle control area will be inhibited so that the person shows depressed muscle tone. d. Heart rate and respiratory rate diminishes or irregular. e. In addition to rapid eye movem ...
Anticholinergics for Overactive Bladder Therapy: Central Nervous
Anticholinergics for Overactive Bladder Therapy: Central Nervous

... The BBB, formed by the endothelial cells that line cerebral capillaries, plays an important role in maintaining the microenvironment for reliable neuronal signaling. In contrast to peripheral capillary beds, the brain endothelial cells have contiguous tight junctions between cells, lack fenestration ...
Relationship between plasma and brain levels and
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... establishment of a relationship between lamotrigine plasma levels and the induced pharmacological response. In spite of the microdialysis study carried out by Walker et al. (2000), the present data represent additional information for the characterization of lamotrigine neuropharmacokinetics in rats ...
Document
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... For nearly two decades my laboratory has investigated the role of dopamine on neuropeptide expression in the nigrostriatal and mesolimbic pathways of the rodent brain. Our research and that of others has demonstrated that dopaminergic transmission exerts dynamic regulation on the levels of expressio ...
Neurosteroids: Expression of Steroidogenic Enzymes and
Neurosteroids: Expression of Steroidogenic Enzymes and

... (Mensah-Nyagan et al., 1994). In situ hybridization studies have revealed that the mRNAs encoding for 3bHSD in the rat brain are localized in the olfactive bulb, nucleus accumbens, hippocampus, area of medulla bordering the fourth ventricle as well as in the thalamus, hypothalamus, and cerebellum (D ...
Cellular scaling rules for the brain of afrotherians
Cellular scaling rules for the brain of afrotherians

... eulipotyphlans, as well as the coordinated scaling of numbers of neurons in the cerebral cortex and cerebellum. Afrotherians share with rodents and eulipotyphlans, but not with primates, the scaling of number of neurons in the cortex and in the cerebellum as a function of the number of neurons in th ...
CHAPTER 11: NERVOUS SYSTEM II: DIVISIONS OF THE
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... Animals exhibiting these symptoms are believed to have an absence or functional deficiency of P-glycoprotein in nervous system capillary endothelium [2]. P-glycoprotein plays a role in the blood brain barrier, acting as an efflux pump to prevent the entry of specific drugs into the nervous system [6 ...
Evolution of the Size and Functional Areas of the Human Brain
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... evolution of life. Although the outline of how and why this happened is being filled in, many fundamental questions remain to be answered. The fossil record, in concert with a comparative neuroanatomical analysis of closely related species, shows that the hominid brain increased in size more than thr ...
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... and Hopkins, 1992; Joyner and Guillemot, 1994). Indeed, the analysis of mice with targeted mutations in wnt-1 (McMahon and Bradley, 1990; Thomas and Capecchi, 1990), pax5 (Urbanek et al., 1994), engrailed-1 and engrailed-2 (Joyner et al., 1991; Wurst et al., 1994), krox-20 (Schneider-Maunoury et al. ...
Structural Abnormalities of the Central Auditory Pathway in Infants
Structural Abnormalities of the Central Auditory Pathway in Infants

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Avian brains and a new understanding of
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Ontogeny, Compartmentation, and Turnover of Spectrin lsoforms in

... the diencephalon, mesencephalon, and brain stem are devoid of this isoform. Further evidence for spectrin compartmentation comes from its ontogeny. Membrane-associated cuyspectrin is present at birth at its adult levels, but cytoplasmic a&spectrin is expressed only following the second postnatal wee ...
Behavioral and Cognitive Neuroscience
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... character is any observable feature or attribute of an organism. A character could be a feature of the brain, such as the corpus callosum between the two cerebral hemispheres, or a feature of any other part of the body, or (as is often the case today) a molecule or a DNA sequence. By considering the ...
Lecture VIII. Spinal Cord
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... The size of white matter tracts (posterior, lateral and anterior columns) increases as more axons are added on the way TO the brain and decreases as axons end on the way FROM the the brain. September 27, 2010 ...
(fMRI) in Brain Tumour Patients
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... some patients. Task-based fMRI in those patients, however, indicated no hand motor area deficit. Such discrepancy may be explained by white matter infiltration, potentially even occurring at a distance of the primary motor cortex, disrupting inter-hemispheric functional connectivity between the 2 pr ...
Lecture VIII. Spinal Cord
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... The size of white matter tracts (posterior, lateral and anterior columns) increases as more axons are added on the way TO the brain and decreases as axons end on the way FROM the the brain. September 21, 2009 ...
III期试验无效。
III期试验无效。

... Refers free radicals induced by oxygen. Including:Superoxide anion (O2-), hydroxyl free radical (OH) , lipid peroxide (LO-, LOO-), oxidation metabolites of ...
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Rhythms of Waking and Sleep 2 Day Circadian Examples

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asgn2a -- NERVOUS SYSTEM - Indiana University Bloomington
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... The nervous system is made of specialized nerve cells called neurons. The human brain contains an estimated 100 billion (1011) to 1 trillion (1012) neurons (far too many to count individually). Neurons are specialization for communication and integration, both in how they work and how they connect t ...
Evolution of Specialized Pyramidal Neurons in
Evolution of Specialized Pyramidal Neurons in

... the visual field [Fries et al., 1985; Movshon and Newsome, 1996; Livingstone, 1998]. The basal dendrites and axon collaterals of Meynert cells extend horizontally to remote sites in layers V and VI providing an anatomic substrate for the integration of information and facilitation of responses acros ...
Introduction to Psychology
Introduction to Psychology

... these tiny openings are blocked by molecules that act like “gates” or “doors.” During an action potential, the gates pop open. This allows sodium ions (Na⫹) to rush into the axon (Carlson, 2010). The channels first open near the soma. Then gate after gate opens down the length of the axon as the act ...
Neuronal Replacement and Reconstruction of Damaged Circuitries
Neuronal Replacement and Reconstruction of Damaged Circuitries

... a case of embryonicneocortexgrafted to the cortex of a six-weekold rabbit. It is remarkablethat this paper s~eemedto havepassed relatively unnoticed.In his autobiography, LeGrosClark (1968) does not even mentionthis study and the findings were never followed up. During the last decade these earlier ...
Fatty acid amide hydrolase expression in rat choroid plexus
Fatty acid amide hydrolase expression in rat choroid plexus

... exerts its powerful sleep-inducing action [1]. Analysis of the effects of oleamide at the cellular level, however, point to a number of potential molecular targets including 5-hydroxytryptamine (5-HT) receptors. For example, oleamide causes potentiation of 5-HT2C and 5-HT2A receptormediated chloride ...
Brain Facts: A Primer On The Brain And Nervous System
Brain Facts: A Primer On The Brain And Nervous System

... developments in neuroscience research and their implications for public policy, societal benefit, and continued scientific progress. The exchange of scientific information occurs at an annual fall meeting where more than 16,000 reports of new scientific findings are presented and more than 30,000 pe ...
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Blood–brain barrier



The blood–brain barrier (BBB) is a highly selective permeability barrier that separates the circulating blood from the brain extracellular fluid (BECF) in the central nervous system (CNS). The blood–brain barrier is formed by brain endothelial cells, which are connected by tight junctions with an extremely high electrical resistivity of at least 0.1 Ω⋅m. The blood–brain barrier allows the passage of water, some gases, and lipid-soluble molecules by passive diffusion, as well as the selective transport of molecules such as glucose and amino acids that are crucial to neural function. On the other hand, the blood–brain barrier may prevent the entry of lipophilic, potential neurotoxins by way of an active transport mechanism mediated by P-glycoprotein. Astrocytes are necessary to create the blood–brain barrier. A small number of regions in the brain, including the circumventricular organs (CVOs), do not have a blood–brain barrier.The blood–brain barrier occurs along all capillaries and consists of tight junctions around the capillaries that do not exist in normal circulation. Endothelial cells restrict the diffusion of microscopic objects (e.g., bacteria) and large or hydrophilic molecules into the cerebrospinal fluid (CSF), while allowing the diffusion of small hydrophobic molecules (O2, CO2, hormones). Cells of the barrier actively transport metabolic products such as glucose across the barrier with specific proteins. This barrier also includes a thick basement membrane and astrocytic endfeet.
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