Gray, Henry. 1918. Anatomy of the Human Body Introduction Anatomical Bibliography I. II. III. IV. V. VI. VII. VIII. IX. X. XI. XII. Nuts and Bolts the neuron A single neuron may be connected to as many as 200 000 others, via junctions called synapses. They form an extensive network throughout the body, and can transmit signals at speeds of 100 metres per second. This enables animals to process and respond to events rapidly, for example by carrying sensory information from the ears to the brain, then instructions for movement from the brain to the leg muscles Within a neuron, signals are transmitted by a change of membrane voltage – a variation in the difference in electrical charge between the inside and outside of the cell. The nature of the connection between neurons was hotly debated until early-20th-century experiments by Otto Loewi and Sir Henry Dale (a founding trustee and chairman of the Wellcome Trust) showed that signals are typically transmitted across synapses by chemicals called neurotransmitters. Researchers are investigating how changing levels of neuron activity alter the number of synapses and how well they transmit signals.
brain atlas Windows Minimum Configuration Operating System: Microsoft Windows 7CPU: Intel Core Duo or AMD 1.8GHzSystem Memory: 1GBGraphics Card: Hardware 3D OpenGL accelerated AGP or PCI Express with 64MB RAMScreen: 1024x768, 32-bit true colorHard Disk: 200MB free space Note: The Brain Explorer 2 software is known to work with the following video chipsets: nVidia GeForce 9400/9600, nVidia Quadro FX 1800/3800/5600, AMD Radeon 9600, AMD Radeon HD 3200/4550, Intel Q35/Q45 Express Important: Please install the latest drivers for your video card for best compatibility and performance. La Comunidad La frase “¿por qué lo llaman amor si quiere decir sexo?” suele expresarse cuando alguien siente un fuerte deseo carnal, y lo disfraza de enamoramiento o conexión especial. Ocurre a menudo, pero el fenómeno contrario también existe y se está volviendo cada vez más común, especialmente entre los adultos jóvenes: asegurar con desdén que se busca sólo sexo cuando en realidad existe un intenso deseo –consciente o inconsciente- de conexión amorosa. En la revisión más extensa (pdf) de estudios científicos y trabajos sociológicos sobre las características y condicionantes de la “hook-up culture” (sexo casual sin compromiso), Justin García del Kinsey Institute cita un estudio según el cual el 65% de mujeres y 45% de hombres confiesan que en su último hookup (rollo esporádico de una noche), en realidad estaban esperando que ese encuentro pudiera llevar a una relación más estable. Justin García y Estupinyà en un bar de la Indiana University (Bloomington) ¿Consecuencias negativas del sexo casual?
The Human Brain · Atlas of the Human Brain · Brain in Stereotaxic Space Brain – The Atlas of the Human Brain in Stereotaxic Space A short introduction in to the Atlas of the Human Brain and the Brain used throughout for the research on this site. To take a more systematical approach to the use of the provided material both on the DVD from the "Atlas of the Human Brain" and the applications you can find on this website the following explanatory steps might help. Figure 1: The Brain used for research in the "Atlas of the Human Brain" and which are used for the main applications is from a 24-year-old male from the Vogt collection in Düsseldorf. Further details about The Brain. Figure 2: After determining the surface of the brain the brain is cut in 5 blocks prior to the sectioning process according to the sterotaxic space. Figure 3: Following the delineation process based on analysis of the cyto- and myelostructure of each slice, there are several reconstructions in three dimensions. Material and applications in this section Surface Views To the Surface views
Neurons never forget a face The human brain is composed of approximately 100 billion neurons, each with distinct functions. One of those functions is face perception—the ability to recognize what someone looks like and recall who they are. The ability to recognize faces persists for years, even though the brain is also plastic, constantly rewiring its connections. A team of scientists from the National Institute of Health may have an answer. Initial recordings were made after implantation to obtain a baseline record of how the neurons responded to different images. In their analysis, the scientists used waveform shape, frequency (the number of spikes occurring within a second), and consistency to assess changes in the response of the face-specific neurons. The results showed that face-specific neurons respond to images with faces in the same way over long periods of time—in one case, recordings went for a year.
stay awake switch brain hemispheres New sleep-deprivation record holder Tony Wright tells Gelf he's altered his brain chemistry and thus can stay up indefinitely. On May 14, Tony Wright walked into the Studio Bar in Penzance, England. For 11 days and two hours, the long-haired horticulturist stayed there, playing pool, talking with other customers, and taking notes. One thing he didn't do, though, was sleep. "I was frustrated that 99 percent of the coverage was. Tony Wright Wright, 43, readily admits his feat was a PR stunt designed to drive interest in his radical theory about diet and brain development (and perhaps sell a few copies of his self-published book Left in the Dark). Even if his ideas seem far-fetched, it's hard to deny that he has done something that most of us—regardless of how many college all-nighters we pulled—can't even imagine. Gelf Magazine: How do you tire out the left hemisphere and make the switch to the right? GM: You said that after five days or so, you felt completely normal. TW: Yes, I did.
Brain musseum e-meducation.org Brain damage can make people immune to the gambler’s fallacy There are parts of the brain that help us see, parts that help us sense, parts that help us reason—and now we’ve identified a part that seems to play a role in making risky decisions, such as those we make when gambling. Gambling is one example of risk-based decision making where players typically think that their chances of winning increase throughout the duration of a game. More specifically, players tend to fall into the illusion that they have more control over the game when they almost win—like when they come one card short of a straight. This tends to be the issue with chronic gamblers and is dubbed the “gambler’s fallacy.” Although we've known about the gambler’s fallacy for quite some time, scientists are now finding evidence that this fallacy involves the part of our brain known as the insula. In addition to gambling, the inusla is thought to play a role in self-awareness, emotions, and addictions.