Why do we make music?

Lots of cognitive scientists are studying why humans like, make and listen to music. Carl Zimmer discusses some of the recent research in the Dec 2010 edition of Discover Magazine. One of the scientists studying music is Robin Dunbar, and Zimmer describes Dunbar's ongoing work (which extends his earlier work on verbal grooming):

Dunbar has spent much of his career studying bands of primates. One of the most important things they do to keep the peace is groom one another. Grooming triggers the primate brain’s hypothalamus to release endorphins, neurotransmitters that ease pain and promote a feeling of well-being. Our early ancestors may have engaged in similar behavior. As humans evolved, though, they started congregating in larger groups. By the time the average group size hit about 150, grooming was no longer practical. Music evolved, Dunbar proposes, because it could do what grooming could no longer do. Large gatherings of people could sing and dance together, strengthening their bonds. In a few studies, researchers have found that listening to music can raise the level of endorphins in the bloodstream, just as grooming can.

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Blindsight demonstrated

I spotted this article about blindsightedness at Seed:

TN’s rare condition is known as blindsight. Because his stroke damaged only his visual cortex, his eyes remain functional and as a result can still gather information from his environment. He simply lacks the visual cortex to process and interpret it. Sight has changed for TN from a conscious to a largely subconscious experience. He no longer has a definitive picture of his surroundings, but he has retained an innate awareness of his position in the world. He is, to some degree, able to see without being aware that he is seeing.

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Brain wiring

Meet the new effort to map the wiring of the human brain. The brain connectome "offers a unique opportunity to understand the complete details of neural connectivity. The Human Connectome Project (HCP) is a project to construct a map of the complete structural and functional neural connections in vivo within and across individuals." Do check out the images at the link location.

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The neuroscience of creativity

How is it that some of us are so highly creative? Doctor (and musician) Charles Lamb is a scientist who studies musical improvisation using fMRI scans, and he has developed theories that apply to all forms of creativity. The subjects were asked to play written music and then to improvise using a mini-keyboard while they were jammed into an fMRI scanners. The brain works very differently when it improvises. It appears that an area of the brain involved in self-monitoring turning off and an area that is autobiographical/expressive turning on. His hypothesis is that the latter area needs to shut off so that we are not inhibited and we are not afraid to make mistakes. Lamb found that when jazz musicians were "trading fours" taking turns improvising four-bar sections, their language areas of the brain lit up (11:30). He also did an experiment regarding free-style hip hop rap music by putting a rapper into an fMRI machine, performing a pre-written tune and a free-style session. When free-style is being done, visual and motor coordination areas light up.

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9/11 as an excuse to say stupid things.

I work in a big office building located in downtown St. Louis, the "Bank of America Plaza." Early this week, I was interviewed for a newspaper article, and I needed an updated photo of myself. A coworker offered to snap that photo using a small digital camera. We want down the elevator to the first floor public lobby of the building, at street level, where we found a large neutral colored wall that we could use as a backdrop for my photo. I stood in front of the wall and my coworker stood about 10 feet away from me. As she took a photo of me a security guard suddenly approached. Me: "In the lobby? In a public lobby?" Guard: "You may not take any pictures here. It’s because of 9/11 and homeland security." Me: "I understand that your employers have instructed you to say these sorts of things, but what you have just told me is about the most idiotic thing I've ever heard. My coworker is simply trying to take a picture of me in front of a wall." Guard: "Sir you cannot continue doing this. You will need to take pictures elsewhere." We left. Apparently, taking pictures of me threatens the United States. Or maybe the threat was taking a picture of the wall behind me. Certainly, the guard made it clear that the building owners prohibit any sort of photos in the lobby. We walked across the street and threatened the United States by taking my photo inside the lobby of a office building across the street, where friendly security guards don’t appreciate the risk of what we were doing. Instead, they naively laughed at our stories about security guards in my own office building.

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