Neuroscience

Proof it's possible to enhance or suppress memories

What if scientists could manipulate your brain so that a traumatic memory lost its emotional power over your psyche? Steve Ramirez, a Boston University neuroscientist fascinated by memory, believes that a small structure ...

Neuroscience

Blood flow command centre discovered in the brain

A team of scientists from Australia, France, New Zealand and the UK has discovered a group of brain cells that function as a 'master-controller' for the cardiovascular system by orchestrating the control of blood flow to ...

Neuroscience

Using laser light to study how epilepsy arises in the healthy brain

Scientists at McGill University have developed a new method to study how seizures arise in the healthy brain. Using laser light guided through ultra-thin optic fibers in the brain of rodents, the researchers "turned on" light-sensitive ...

Health

How to treat sunspots

Dear Mayo Clinic: How effective is laser resurfacing for removing sunspots? Are there creams or other products that work to treat sun-damaged skin?

Diseases, Conditions, Syndromes

Multiple, sequential light, laser sources no benefit in rosacea

(HealthDay)—Use of multiple, sequential light and laser sources to activate aminolevulinic acid (ALA) in photodynamic therapy (PDT) does not lead to statistically significant improvements in patient outcome for rosacea, ...

Neuroscience

Revolutionizing the revolutionary technology of optogenetics

The revolution that optogenetics technology has brought to biology—neuroscience in particular—could be transformed all over again if a new project getting underway at Brown University and Central Michigan University (CMU) ...

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Laser

A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.

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