Saturday, November 21, 2009

Music Stirs the Emotions. Emotions Stir the Memories

Numerous anecdotal reports are suggesting that stroke or dementia patients benefit from listening to music. For example, Everett Dixon, a 28-yearold stroke victim, apparently learned to walk and use his hands again from daily listening to the kind of music he liked. Ann Povodator, an 85 year-old Alzheimer's patient, perks up when she listens to her beloved opera and Yiddish songs; her daughter says "It seems to touch something deep within her."

Caregivers commonly report that stroke or dementia patients can recall and sing songs from long ago, even when most other memories are lost. Moreover, the music can help retrieve memories that were associated with the music, not just the music itself.

Formal music therapy programs are sprouting up. Best known is the non-profit Institute for Music and Neurologic Function, directed by Concetta M. Tomaino, who lives in Garrison, New York. The Institute claims that music can help premature infants gain weight, autistic children communicate, stroke patients re-gain speech and mobility, surgical patients alleviate pain, and psychiatric patients relieve anxiety and depression. The most effective music seems to be that which the patient experienced and liked in their youth. Few of these observations come from controlled studies that rule out the possibility that the improvement was going to occur anyway without the music. Nonetheless, there are apparently 5,000 certified music therapists in the U.S. (I have no idea how one gets certified as a "music therapist.")

I do believe that there is some scientific basis for some of the claims. I have discussed elsewhere how emotions help to consolidate experiences into long-term memories as well as to retrieve such memories. Some of the same brain areas that generate emotions are also the ones involved in forming memories. Moreover, when a person initially hears a song, there may be powerful associations of other events and situations. We all know that associations help create robust memories.

Many students like to listen to music while they study. I think my frenquent listening to jazz helped me memorize all the required stuff in veterinary school. Others claim that classical music aids study. I would point out that both jazz and classical music are instrumental. I am convinced that songs with lyrics would be counterproductive, for the linguistic content serves as a distraction and could easily distrupt memory consolidation processes.

As for recall of already formed memories, music, if it is music you have learned to love, will at a minimum improve your emotional state, particularly in relieving stress. This alone can facilitate memory retrieval. Depression, anxiety, and stress are well known inhibitors of both memory formation and memory retrieval. Being happy not only feels good, it is also good for memory.


Sources:

http://www.bethabe.org/music_institute55.html
Beck, Melinda. 2009. A key for unlocking memories. Wall St. Journal, Tuesday, Nov. 17, p. D1.

Monday, November 09, 2009

Daytime Naps Promote Skilled-movement Learning

Whether you are learning to play the piano or learning to throw a football to a fast-breaking receiver, the necessary muscle movements have to be memorized. Converting the memory of movements into long-lasting form takes several hours or more for the brain to "consolidate" the learned movements. This process can be disrupted by trying to learn a different movement during this vulnerable period. For example, consolidation of the memory for a few chords on the piano can be disrupted by trying to learn finger movements on a computer keyboard during this consolidation period.

Another feature of motor learning is that delayed gains in skill performance can occur after a latent period of several hours after an effective learning experience. This delayed performance gain depends on the first post-training night's sleep (I have explained the role of sleep on other kinds of memory in my book on improving memory.

Now comes a study that shows that daytime naps condense the time course of motor- memory consolidation. In the experiment, subjects learned a five-element finger-to-thumb opposition sequence with their non-dominant hand. Then the experimenters tested the effect of a post-training nap. Compared to no-nap controls, a 90-minute daytime nap immediately after training markedly reduced the susceptibility to post-training interference effects and produced a much earlier expression of delayed gains within 8 hours post training. Thus, both memory-enhancing effects were produced by the nap.

Would a shorter nap produce the same effect? We don't know. It wasn't tested. Another untested possibility is that the daytime nap might enhance the memory consolidation that is normally produced by a night's sleep after a motor learning experience, especially if the task is rehearsed that same day after the nap.

Source:

Korman, M. et al. 2009. Daytime sleep condenses the time course of motor memory consolidation. Nature Neuroscience. 10 (9): 1206-1213.

Thursday, October 29, 2009

Memory Peg Systems

Memory peg systems provide a systematic way to use visual image "pegs" with material you are trying to remember. Peg systems are used by all memory wizards who put on shows exhibiting their extraordinary memory ability. They are also used by Las Vegas "card counters."

The basic idea in these systems, typically called “peg” systems, is to have a set of pre-memorized mental image “pegs” on which you hang images of items that you need to remember. A popular version of this is a room system. The process begins with picturing in your mind a room where certain conspicuous objects are unchanging, both in type and location. Then you use images of these objects as pegs for making associations. Suppose, for example, you want to memorize a to-do list and the sequence in which things have to be done: send e-mail to boss, call your dentist office for an emergency appointment, have lunch with a client, send a check to the water company, and a host of other things that I won’t list to keep this from being tedious. You might then use your bedroom pegs this way: you enter the door, which has an image of your e-mail system, Then your turn left to see your dresser, which has dentures sitting conspicuously on the top. Then you see the lamp on the dresser, which was turned off but now switches on to reveal a lunch plate. Next you see your bookcase with your checkbook falling off the shelf into a bucket of water. You continue this peg-linking process as you mentally move around the room from object to object and the mental images you need to associate with them.

You can use any room in your house, as long as the anchor pegs don’t change (such as furniture that you move periodically). You can also use other familiar rooms (garage, office, church, restaurant. I describe this and other peg systems, including a system for remembering numbers, in my book.

I recently came across a peg system by Dean Vaughn that I like. His system uses an imaginary numbered room system. This relies on an image of a cube, representing an empty room. Locations in the room are identified by number, beginning at one corner and moving around the room (wall to corner to next wall, etc.). Including the top and bottom of the cube, this gives peg anchor locations for 10 items. And if you need more than 10 items, you can create other rooms for 11-19, 20-21, etc.

You can start numbering at any point as long as you are consistent. I like to start with the wall facing me as point #1, because this is the center of the overall image. Here is an example of how I used this system this week to memorize a speech about writing as a career: to an English club at Blinn College in Brenham, Texas. After creating my mental images, I had them all memorized after about two to three rehearsals, and gave a 45 minute talk without notes and without even my hard copy of the numbered cube--not bad for somebody my age.

Here is how I did it: I made a numbered-cube template and saved it to use any time I want to develop a talk. Then for a given talk, I load the template in PowerPoint and read in appropriate icons to act as pegs. For example, my writing talk was on the subject “The Who, What, Where, Why, When, and How of Writing.” Icons are picked on the basis of what comes to my mind when I think of the word. For example, “who” makes me think of a hoot owl; “how” makes me think of an Indian. Many of the icons are sound-a-likes, or “audionyms.” For example, for “what,” I picked “hat,” for “where” I picked “hair,” for “when,” I picked hen.

For each topic icon, I write beside or underneath it in pencil a few key words and create mental images to represent the ideas associated with those key words. When I rehearse, if I can't recall all the images for a given peg, I look at the key words and reinforce the image or make one that will work better for me.

As the talk's preface, I decided to talk about my writing life, which I represented with the icon of a person (me) typing. Then I attached associated mental images (not real ones put on the template) to that icon (my high school, my college newspaper, a sample of my research papers, and a sample of my books). Next in the talk, I wanted to cover the topic of who do you write for. First, I discuss that a true writer writes because he must, that is he writes for himself. So I picture the owl looking at me. Then, I cover the theme that writers should know their audience and market, so I imagined the owl rotating its head as owls do to look away from me to look at a crowd of people. Well, I could go on with elaborations to the point of tedium. I assume you get the drift. The basic idea is to use images that make sense to you and associate them with your pegs.

Source: Vaughn, D. 2007. How to Remember Anything. St. Martin’s Griffin, New York.