• What Is Dopamine?
    Dopamine is a type of neurotransmitter. Your body makes it, and your nervous system uses it to send messages between nerve cells. That's why it's sometimes called a chemical messenger.Dopamine plays a role in how we feel pleasure. It's a big part of our unique human ability to think and plan. It helps us strive, focus, and find things interesting.Your body spreads it along four major pathways in the brain. Like most other systems in the body, you don’t notice it (or maybe even know about it) until there’s a problem.Too much or too little of it can lead to a vast range of health issues. Some are serious, like Parkinson’s disease. Others are much less dire.
    By Hope CristolMedically Reviewed by Smitha Bhandari, MD on June 14, 2021
    https://www.webmd.com/mental-health/what-is-dopamine



  • Medulla oblongata (animation)
    How much does the human brain weigh? In terms of weight, the average adult human brain weighs in at 1300 to 1400 grams or around 3 pounds. In terms of length, the average brain is around 15 centimeters long. For comparison, a newborn human baby's brain weighs approximately 350 to 400 grams or three-quarters of a pound. Men tend to have bigger brains than women. (In terms of length, the average brain is around 15 centimeters long.)
    By Images are generated by Life Science Databases(LSDB). - from Anatomography, website maintained by Life Science Databases(LSDB).You can get this image through URL below. 次のアドレスからこのファイルで使用している画像を取得できますURL., CC BY-SA 2.1 jp, https://commons.wikimedia.org/w/index.php?curid=9804279
    https://en.wikipedia.org/wiki/Medulla_oblongata#/media/File:Medulla_oblongata_small.gif



  • Location of the human cerebrum (red).
    How much does the human brain weigh? In terms of weight, the average adult human brain weighs in at 1300 to 1400 grams or around 3 pounds. In terms of length, the average brain is around 15 centimeters long. For comparison, a newborn human baby's brain weighs approximately 350 to 400 grams or three-quarters of a pound. Men tend to have bigger brains than women. (In terms of length, the average brain is around 15 centimeters long.)
    English: Cerebrum(red). Polygon data are from BodyParts3D maintained by Database Center for Life Science(DBCLS).日本語: 大脳。 ポリゴンデータはDatabase Center for Life Science(DBCLS)の作成しているBodyParts3Dより。
    https://commons.wikimedia.org/wiki/File:Cerebrum_animation_small.gif

  • Dopamine, Smartphones & You: A battle for your time

    If you’ve ever misplaced your phone, you may have experienced a mild state of panic until it’s been found. About 73% of people claim to experience this unique flavor of anxiety, which makes sense when you consider that adults in the US spend an average of 2-4 hours per day tapping, typing, and swiping on their devices—that adds up to over 2,600 daily touches. Most of us have become so intimately entwined with our digital lives that we sometimes feel our phones vibrating in our pockets when they aren’t even there.
    While there is nothing inherently addictive about smartphones themselves, the true drivers of our attachments to these devices are the hyper-social environments they provide. Thanks to the likes of Facebook, Snapchat, Instagram, and others, smartphones allow us to carry immense social environments in our pockets through every waking moment of our lives. Though humans have evolved to be social—a key feature to our success as a species—the social structures in which we thrive tend to contain about 150 individuals. This number is orders of magnitude smaller than the 2 billion potential connections we carry around in our pockets today. There is no doubt that smartphones provide immense benefit to society, but their cost is becoming more and more apparent. Studies are beginning to show links between smartphone usage and increased levels of anxiety and depression, poor sleep quality, and increased risk of car injury or death. Many of us wish we spent less time on our phones but find it incredibly difficult to disconnect. Why are our smartphones so hard to ignore?
    by Trevor Haynesfigures by Rebecca Clements
    https://sitn.hms.harvard.edu/flash/2018/dopamine-smartphones-battle-time/#:~:text=The%20human%20brain%20contains%20four%20major%20dopamine%20%E2%80%9Cpathways%2C%E2%80%9D,its%20own%20associated%20cognitive%20and%20motor%20%28movement%29%20processes.