Microglia Help Regulate Blood Flow In The Brain

Microglia help regulate blood flow and maintain the brain’s critical blood vessels, University of Virginia School of Medicine researchers have found. It is an important but previously unknown role for these immune cells that protect the brain from disease and injury. The findings1 may prove important in cognitive decline, dementia and stroke, among other conditions linked to diseases of the brain’s small vessels. Precise blood vessel function is critical to accommodate the extreme energy demands of the brain for normal brain function.

Mapping Neural Projections In The Bumblebee Brain

Bumblebees forage widely for pollen and nectar from flowers, sometimes travelling kilometers away from their nest, but they can somehow always find their way home in a nearly straight line. These insects have been known to return to their nest from new locations almost 10 kilometers away. This homing ability is a complex neurological feat and requires the brain to combine several processes, including observing the external world, controlling bodily movements and drawing on memory.

Modified Macrophage Metabolism Aids Peripheral Nerve Regeneration

Macrophages can be altered to support and speed the regeneration of peripheral nerves in mice following injury, Johns Hopkins Medicine researchers have found. The nerves outside the brain and spinal cord, known as peripheral nerves, have the capacity for regeneration, but the rate of natural renewal is so slow that many nerve injuries lead to incomplete recovery and permanent disability for patients. Brett Morrison M.D., Ph.D., associate professor of neurology at the Johns Hopkins University School of Medicine; Mithilesh Kumar Jha, Ph.

Structure Tensor Analysis Uncovers White Matter Fiber Architecture

A new approach to mapping and visualizing the brain’s white matter fiber has been developed by neuroscientists at the Hebrew University of Jerusalem. They took advantage of a technique that has existed for almost 140 years, but was never utilized to study the fiber architecture of the brain’s white matter. Uncovering these wire-like highways connecting neurons has been a longstanding challenge for neuroscience. Existing methods for mapping this neural circuitry at the cellular level are either limited to animal studies or require highly specialized equipment for data acquisition and processing.

Prucalopride May Boost Hippocampal-dependent Memory

Prucalopride, which targets the 5-HT4 receptor, may improve cognition and memory, a group of UK researchers has found. Even when the low mood associated with depression is well-treated with conventional antidepressants, many patients continue to experience problems with their memory. Our study provides exciting early evidence in humans of a new approach that might be a helpful way to treat these residual cognitive symptoms, Dr. Susannah Murphy, senior research fellow, University of Oxford and a senior author of the study1, said.

Hippocampus Activity Preferentially Supports Recall Of Coherent Narratives

The hippocampus may be the brain’s storyteller, connecting separate, distant events into a single narrative, a new brain imaging study shows. Things that happen in real life don’t always connect directly, but we can remember the details of each event better if they form a coherent narrative, said Brendan Cohn-Sheehy, an MD/PhD student at the University of California, Davis and first author of the paper1. Narrative Coherence Cohn-Sheehy and colleagues used functional MRI to image the hippocampus of volunteers as they learned and recalled a series of short stories.

Oxytocin Release In The Brain Affected By Dendrite Omsolarity

Oxytocin is often referred to as a ‘love hormone’ because it can be released during activities such as hugging, snuggling, or sex. Reality, of course, can be a bit more complicated. In the brain, oxytocin can have powerful and diverse effects on mood, stress, anxiety, and social interactions. In the body it helps regulate fluid balance, promotes contractions during childbirth, and stimulates the letdown of milk during breastfeeding. Oxytocin-synthesizing neurons in the hypothalamus.

Hormone Replacement Therapy Not Linked To Higher Dementia Risk

A large study assessing the risks of developing dementia associated with different types and durations of menopausal hormone therapy found no increased risk regardless of hormone type, dose, or duration1. Within the subgroup of women with a specific diagnosis for Alzheimer’s disease, a slight increasing risk association was found with use of estrogen-progestogen treatments, but measurable only for long-term usage (5 years or more). Use of different hormones and adjusted odds ratios for dementia overall and for Alzheimer’s disease.