TAMPA, Fla. (WFLA) — Following multiple news organizations covering allegations of animal abuse at Neuralink, Elon Musk’s brain chip company, the tech developer issued a statement on its animal welfare policies.
Earlier this month, the Physicians Committee for Responsible Medicine announced lawsuits against the University of California, Davis and Neuralink over its treatment of the macaque monkeys used to test the experimental brain implants developed by Musk’s company.
Ability of immune system to destroy Alzheimer’s-related protein oscillates with daily circadian rhythm.
The brain’s ability to clear a protein closely linked to Alzheimer’s disease is tied to our circadian cycle, according to research published recently in PLOS Genetics. The research underscores the importance of healthy sleep habits in preventing the protein Amyloid-Beta 42 (AB42) from forming clumps in the brain, and opens a path to potential Alzheimer’s therapies.
“Circadian regulation of immune cells plays a role in the intricate relationship between the circadian clock and Alzheimer’s disease,” said Jennifer Hurley, an expert in circadian rhythms, and associate professor of biological science at Rensselaer Polytechnic Institute. “This tells us a healthy sleep pattern might be important to alleviate some of the symptoms in Alzheimer’s disease, and this beneficial effect might be imparted by an immune cell type called macrophages/microglia.”
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Ion channels are crucial for neural communication; they control the flow and gradient of charged particles, creating electrical signals. Recent work report | Neuroscience.
In this study, the researchers assessed how dense ion channels were packed in the membranes of neuronal cells from ten species of mammals, including mice, rats, rabbits, ferrets, macaques, marmosets, macaques, humans, and one of the smallest known mammals, an animal called the Etruscan shrew. The team focused on a type of excitatory neuron typically found in the cortex of the brain, and three ion channels that are in the membranes of those cells; two are voltage-gated ion channels that control the movement of potassium, another is called the HCN channel and both potassium and sodium ions can flow through it.
Studies have suggested that the human brain is built like the brains of other mammals, said first study author Lou Beaulieu-Laroche, a former MIT graduate student. It was once thought that in mammals, these channels would be present at about the same density from one species to another.
Instead, the researchers determined that as the neurons got bigger, the density of ion channels increased. That was a notable finding, because as that density increases, more energy needed to move ions in and out of neurons, explained senior study author Mark Harnett, an associate professor of brain and cognitive sciences at MIT.
Grief can be overwhelming. Here’s what’s going on in the brain when you’re heartsick.
28:49 minutes.
But having strong relationships also means the possibility of experiencing loss. Grief is one of the hardest things people go through in life. Those who have lost a loved one know the feeling of overwhelming sadness and heartache that seems to well up from the very depths of the body.
