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Category: neuroscience – Page 923

100-Hour-Long MRI of Human Brain Produces Most Detailed 3D Images Yet

Scientists have produced what looks to be the most detailed magnetic resonance imaging (MRI) scan ever taken of the human brain anatomy, and are sharing their data with the public.

Thanks to an anonymous deceased patient whose brain was donated to science – and a gargantuan 100 hours of scanning with one of the most advanced MRI machines – the world now has an unprecedented view of the structures that make thought itself possible.

In a new study led by neuroimaging scientist Brian L. Edlow from Massachusetts General Hospital, researchers describe how they recorded their ultra-high resolution MRI dataset of the ex vivo specimen, offering a never-before-seen view of the “three-dimensional neuroanatomy of the human brain”.

Scientists Have Discovered a New Stem Cell That Could Heal Brain Damage

A newly discovered type of stem cell could help brains repair themselves from injury or even debilitating diseases like Alzheimer’s, according to the latest research.

Called the “G2 quiescent stem cell”, it’s one of several ‘sleeping’ (or quiescent) stem cells in the brain.

But this one is showing more potential for regeneration than the others have so far. Like other stem cells, it can produce cells of all different types on demand – whatever the body needs.

New clues on why women’s Alzheimer’s risk differs from men’s

LOS ANGELES (AP) — New research gives some biological clues to why women may be more likely than men to develop Alzheimer’s disease and how this most common form of dementia varies by sex.

At the Alzheimer’s Association International Conference in Los Angeles on Tuesday, scientists offered evidence that the disease may spread differently in the brains of women than in men. Other researchers showed that several newly identified genes seem related to the disease risk by sex.

Two-thirds of Alzheimer’s cases in the U.S. are in women and “it’s not just because we live longer,” said Maria Carrillo, the association’s chief science officer. There’s also “a biological underpinning” for sex differences in the disease, she said.

Richard Christophr Saragoza Photo 2

All species of Datura are poisonous, especially their seeds and flowers which can cause respiratory depression, arrhythmias, hallucinations, psychosis, as well as death if taken internally.

All Datura plants contain tropane alkaloids such as scopolamine, hyoscyamine, and atropine, primarily in their seeds and flowers as well as the roots of certain species such as D. wrightii.

Gut microbes protect against neurologic damage from viral infections

Gut microbes produce compounds that prime immune cells to destroy harmful viruses in the brain and nervous system, according to a mouse study published today in eLife.

The findings suggest that having healthy and diverse microbiota is essential for quickly clearing viruses in the nervous system to prevent paralysis and other risks associated with diseases such as multiple sclerosis.

A condition that causes progressive damage to nerve cells, multiple sclerosis has become more common over the past several decades. Viral infections in the brain or spinal cord are thought to trigger this disease. Some scientists believe that changes in the way we eat, increased sanitation or growing antibiotic use may be causing detrimental changes in the that live within the human body, potentially increasing the risk of multiple sclerosis and other related diseases.