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. Scientists have long speculated about the physical changes that occur in the brain when a new memory is formed. Now, research from the National Institute for Physiological Sciences has shed light on this intriguing neurological mystery.
"The dmPFC shows specific neural activation and synchrony during fear-memory retrieval and evoked fear responses, such as freezing and heart rate deceleration," explains lead author Masakazu Agetsuma."Artificial silencing of the dmPFC in mice suppressed fear responses, indicating that this region is required to recall associative fear-memory.
"We successfully detected a neural population that encodes fear memory," says Agetsuma."Our analyses showed us that fear conditioning induced the formation of a fear-memory neural network with 'hub' neurons that functionally connected the memory neurons." Memories have long been thought to be formed by the enhancement of neural connections, which are strengthened by the repeated activation of groups of neurons. The findings of the present study, which were based on both real-life observations and model-based analysis, support this. Furthermore, the study demonstrates how combined methods can be used to visualize the dynamics of neural networks in great detail.
México Últimas Noticias, México Titulares
Similar News:También puedes leer noticias similares a ésta que hemos recopilado de otras fuentes de noticias.
Russian Troops Facing 'Mental Health Crisis'—UKHuge numbers of Russian military personnel have post-traumatic stress disorder, said Britain's defense ministry.
Leer más »
Researchers reconstruct speech from brain activity, illuminates complex neural processesResearchers created and used complex neural networks to recreate speech from brain recordings, and then used that recreation to analyze the processes that drive human speech.
Leer más »
Researchers prove that new method can be used to measure ozone stress in soybeansAs the world focuses on not only solving the climate crisis but also sustaining the world's food supply, researchers need tools to evaluate how atmospheric pollutants affect crops. Over the past decade, the agriculture community has turned to solar-induced chlorophyll fluorescence (SIF) measurements to detect stresses on plants.
Leer más »
Massive prehistoric solar storm is warning for Earth, researchers sayResearchers have identified what appears to be the largest solar storm to hit Earth, which occurred 14,300 years ago.
Leer más »
'Paradigm shift' needed on plastics health risk: researchersA 'paradigm shift' is needed on the risks posed to human health by plastics, researchers said Wednesday, warning of huge gaps in scientific understanding of the issue.
Leer más »
Hamas uses social media to incite fear, researchers findThe Palestinian militant group spread violent images and propaganda on platforms like Telegram and X in the wake of its brutal attack on Israel.
Leer más »