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Why are Memories Forgotten?

Do you remember what you ate for dinner two months ago? Or do you remember the last text message you sent to that friend you last talked to? For most of you, no, you don’t know, our minds are just simply not made to remember insignificant details, but some people can remember, but most forget. So why do we forget things, and how are they stored? Firstly, how are memories made in the first place? As much as we talk about the brain being this muscle being capable of being highly intelligent with an inner monologue and mental thinking capacity; most of our brain is made up of neurons.  According to the Brain Institute of Queensland, neurons are fundamental units of the brain and nervous system, responsible for the sensory input from the external world, relaying motor and thinking skills, transforming and relaying electrical signals for every step. When we experience something, the neurons in our brain physically interact with our senses, and create something called synapses, which are sto

The effects of meditation on brain structure and function

 Meditation is a powerful tool designed to train the mind to focus and redirect thoughts. It has been around for centuries and is used for various purposes, such as reducing stress, improving concentration, and memory. In recent years, scientists have discovered that meditation has measurable effects on the brain's structure and function. This article will explore the effects of meditation on brain structure and function, including the benefits of mindfulness.

The effects of meditation on brain structure and function



### Effects of Meditation on Brain Structure


Several studies have shown that meditation can change the brain's structure. One study used magnetic resonance imaging (MRI) to examine the brains of 16 participants who had been meditating for an average of 24 years. The results showed that the meditators had more gray matter in brain regions associated with attention, sensory processing, and emotional regulation than non-meditators[1]. Another study used cortical thickness mapping and diffusion tensor imaging to examine the brains of 44 participants who had been meditating for an average of 6 years. The results showed that the meditators had thicker cortical regions in brain areas associated with attention and sensory processing than non-meditators[2].


### Effects of Meditation on Brain Function


Meditation has also been shown to change brain function. One study used functional MRI (fMRI) to examine the brains of 12 participants who had been meditating for an average of 7 years. The results showed that the meditators had increased activity in brain regions associated with self-referential processing, attention, and sensory processing than non-meditators[3]. Another study used fMRI to examine the brains of 20 participants who had been meditating for an average of 8 years. The results showed that the meditators had increased activity in brain regions associated with emotion regulation and cognitive control than non-meditators[4].


### Benefits of Mindfulness


Mindfulness is a type of meditation that involves paying attention to the present moment without judgment. It has been shown to have numerous benefits for both the mind and body. One study found that mindfulness meditation can increase immune functioning, improve well-being, and reduce psychological distress[5]. Another study found that mindfulness meditation can increase information processing speed and decrease task effort[6]. Mindfulness has also been shown to enhance self-insight, morality, intuition, and fear modulation, all functions associated with the brain's middle prefrontal lobe area[4].


### Conclusion


In conclusion, meditation has measurable effects on the brain's structure and function. It can increase gray matter in brain regions associated with attention, sensory processing, and emotional regulation, as well as increase cortical thickness in brain areas associated with attention and sensory processing. Meditation can also increase activity in brain regions associated with self-referential processing, emotion regulation, and cognitive control. Mindfulness, a type of meditation, has numerous benefits for both the mind and body, including increased immune functioning, improved well-being, and reduced psychological distress. Further research is needed to fully understand the neurophysiological processes of meditation and the benefits of long-term practice on the brain.


References:


[1] Luders, E., Toga, A. W., Lepore, N., & Gaser, C. (2009). The underlying anatomical correlates of long-term meditation: Larger hippocampal and frontal volumes of gray matter. NeuroImage, 45(3), 672-678.


[2] Kang, D. H., Jo, H. J., Jung, W. H., Kim, S. H., Jung, Y. H., Choi, C. H., ... & Kwon, J. S. (2013). The effect of meditation on brain structure: cortical thickness mapping and diffusion tensor imaging. Social cognitive and affective neuroscience, 8(1), 27-33.


[3] Hasenkamp, W., & Barsalou, L. W. (2012). Effects of meditation experience on functional connectivity of distributed brain networks. Frontiers in human neuroscience, 6, 38.


[4] Tang, Y. Y., Lu, Q., Fan, M., Yang, Y., & Posner, M. I. (2012). Mechanisms of white matter changes induced by meditation. Proceedings of the National Academy of Sciences, 109(26), 10570-10574.


[5] Davidson, R. J., Kabat-Zinn, J., Schumacher, J., Rosenkranz, M., Muller, D., Santorelli, S. F., ... & Sheridan, J. F. (2003). Alterations in brain and immune function produced by mindfulness meditation. Psychosomatic medicine, 65(4), 564-570.


[6] Moore, A., & Malinowski, P. (2009). Meditation, mindfulness and cognitive flexibility. Consciousness and cognition, 18(1), 176-186.


Citations:

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3541490/

[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4471247/

[3] https://psychcentral.com/blog/how-meditation-changes-the-brain

[4] https://www.apa.org/monitor/2012/07-08/ce-corner

[5] https://www.scientificamerican.com/article/neuroscience-reveals-the-secrets-of-meditation-s-benefits/

[6] https://news.harvard.edu/gazette/story/2018/04/harvard-researchers-study-how-mindfulness-may-change-the-brain-in-depressed-patients/

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