Psychology

A study has investigated the possible scenarios that could lead to waning memory in some older people.

Comparing PET scans of more than 90 adults with and without mild cognitive impairment (MCI), researchers say relatively lower levels of the so-called 'happiness' chemical, serotonin, in parts of the brain of those with MCI may play a role in memory problems including Alzheimer's disease.

In a world grappling with deep-seated division and social upheaval, empathy has become more critical than ever. But science suggests when it comes to evoking empathy, our imagination is more powerful than we previously thought. A new study reveals how the different ways to experience empathy affect our willingness to help others.

Researchers have discovered a new way ribonucleic acid (RNA) impacts fear-related learning and memory. Researchers demonstrated that a noncoding RNA known as Gas5 coordinates the trafficking and clustering of RNA molecules inside the long processes of neurons, and orchestrating neuronal excitability in real time that contributes to learning and memory. This study builds on earlier findings this yearwhich identified a separate population of learning-related RNAs that accumulate near the synapse -- the junction between neurons that allow them to communicate. In that paper, published in theJournal of Neuroscience, they uncovered several new synapse-specific RNA that harbour a specific chemical ..

It is well known that people who have lived through traumatic events like sexual assault, domestic abuse, or violent combat can experience symptoms of post-traumatic stress disorder (PTSD), including terrifying flashbacks, severe anxiety, and uncontrollable thoughts about the incident. But what exactly happens in the brains of PTSD patients as they recall these traumatic events? Are they remembered the same way as, say, the loss of a beloved pet -- or, for that matter, a relaxing walk on the beach?

With little insight into the impact of a lack of sleep on risky decision-making at the neuroimaging level, researchers found a 24-hour period of sleep deprivation significantly impacted individuals' decision-making processes by dampening neural responses to the outcomes of their choices.

What is the mechanism that allows our brains to incorporate new information about the world, and form memories? New work by a team of neuroscientists shows that learning occurs through the continuous formation of new connectivity patterns between specific engram cells in different regions of the brain.

Psychologists used music to manipulate emotions of volunteers and found the dynamics of their emotions molded otherwise neutral experiences into memorable events. The tug of war between integrating memories and separating them helps to form distinct memories, allowing people to understand and find meaning in their experiences, and retain information. These findings could hold therapeutic promise in helping people with PTSD and depression.

As possibilities have changed and technology has advanced, memories and nostalgia are now a significant part of our use of social media.

Depression is one of the most common mental illnesses in the world, but current anti-depressants have yet to meet the needs of many patients. Neuroscientists recently discovered a small molecule that can effectively alleviate stress-induced depressive symptoms in mice by preventing aversive memory formation with a lower dosage, offering a new direction for developing anti-depressants in the future.

With the rise of new drugs that can target the amyloid-beta plaques in the brain that are an early sign of Alzheimer's disease, new ways are needed to determine whether memory loss and thinking problems are due to Alzheimer's disease or another neurodegenerative disorder. A new study shows that shrinkage in the hippocampus area of the brain is associated with cognitive decline, even in people who don't have amyloid plaques in the brain. The hippocampus plays a role in memory.

New research shows promise in treating addiction cravings by combining eye movements and guided instructions to process memories. Researchers transformed dysfunctional memories stored in the brain through processing and integration. EMDR was as effective as cognitive behavioral therapy for cravings with the combination of both resulting in more reduction in craving than cognitive behavioral therapy (CBT) alone. Both groups (experimental group and control group using only CBT) had clinically significant reductions in cravings, repetitive negative thoughts, and irrational cognitions, with the experimental group showing greater decreases overall.

Neuroscientists have discovered a fascinating connection between the retention of early life memories and brain developmental trajectories associated with autism.

To expand the understanding of memory, a research team has developed a technology called LCD-eGRASP (local circuit dual-eGRASP) that can label synapses of neural circuits within a specific brain region. The team applied this new technology to identify the local synaptic connections between inhibitory interneurons and engram cells, shedding light on the role of inhibitory interneurons in memory expression.

Researchers discovered the cerebellum coordinates the brain network essential for social recognition memory.

New research shows that children who are too short for their age can suffer reduced cognitive ability from as early as six months old. Researchers compared the 'visual working memory'in children who had stunted growth with those having typical growth. They found that the visual working memory of infants with poor physical growth was disrupted, making them more easily distracted and setting the stage for poorer cognitive ability one year later.

For the first time, a new study in rats teases apart the role of the hippocampus in two functions of memory -- one that remembers associations between time, place and what one did, and another that allows one to predict or plan future actions based on past experiences.

A new study has examined the role of several cognitive functions in young students learning to write English, their second language. The study conducted a battery of cognitive tests, gauged the writing skills of the students and then tested the functions again. Working memory, or how we store thoughts we want to convey, was shown to be the most significant predictor of writing ability. Other cognitive functions like phonological awareness and oral language development increased as the students aged, but were not associated with improved writing. The results not only help us understand how English learners, a growing population, learn to write, but can help educators design better interventio..

Researchers found that fear conditioning led to learning-specific changes in neuronal-network activity in the dorsal part of the medial prefrontal cortex of mice. This study demonstrates the use of combined methods for detailed visualization of the dynamics of neural networks, and describes techniques that could be used to uncover additional information about the neurological changes associated with learning and memory.

Among people who report memory and thinking problems, some show no signs of a problem on standard tests, while others have subtle declines on their tests. A new study shows that people who have subtle problems with these tests may have an increased risk of developing mild cognitive impairment, which can be a precursor to dementia.

A new study reveals the crucial role of vascular system cells -- known as pericytes -- in the formation of long-term memories of life events -- memories that are lost in diseases such as Alzheimer's disease.

Researchers have established the protein p53 as critical for regulating sociability, repetitive behavior, and hippocampus-related learning and memory in mice, illuminating the relationship between the protein-coding gene TP53 and neurodevelopmental and conditions like autism spectrum disorder.

New research hints at a few ways fatty foods affect cells in the brain, a finding that could help explain the link between a high-fat diet and impaired memory -- especially as we age. A new study in cell cultures found the omega-3 fatty acid DHA may help protect the brain from an unhealthy diet's effects by curbing fat-induced inflammation at the cellular source.

People differ significantly in their memory performance. Researchers have now discovered that certain brain signals are related to these differences.

Trigonelline is derived from coffee; researchers have found that it improves spatial learning and memory in senescence-accelerated mice. The study also suggested that this effect results from inhibiting neuroinflammation and restoring neurotransmitter levels in the brain.

A research study has found that cerebellar inhibitory interneurons are essential for fear memory, a type of emotional memory formation. Inhibitory interneurons within the cerebellar circuitry act as gatekeepers and control the output of the cerebellar cortex. The formation of fear memory requires the activity of these interneurons. The findings may lead to a novel treatment approach for post-traumatic stress disorder.

New research finds that antidepressants may actually reduce negative memories in individuals suffering from depression while improving overall memory function.

Remembering the order of information is central for a person when participating in conversations, planning everyday life, or undergoing an education. A new study shows that this ability is probably human unique. Even the closest relatives of humans, such as bonobos, do not learn order in the same way.

Scientists have made a 'paradigm shifting' discovery on the mechanisms required for learning and memory that could lead to new therapies for Alzheimer's disease and potentially Down syndrome.

Researchers make progress in developing a digital biomarker that detects early signs of Alzheimer's disease in brainwave patterns using a simple 'wearable' headband at night.