Thread: Ultrasound to induce Lucid Dreams?

I just read the study from here

http://www.pubmedcentral.nih.gov/art...?artid=2568804

Ultrasound seems like a really plausible means of activating the brain while asleep.

Someone needs to try it and see what happens

Well it's not as easy as "just trying" it; accurate ultrasonic transduction is difficult to reproduce without the necessary, often expensive, equipment. I've worked with electronics and the like quite a bit myself, and can see some parts being replaced by more simple, cheaper circuits, but other parts (i.e., the transducer) will still cost a few grand.

And to accurately measure what is going on would require a CT or MRI in order to achieve a resolution fine enough to make out small modulations in neurotransmission caused by LILFU.

Originally Posted by Ailos

Well it's not as easy as "just trying" it; accurate ultrasonic transduction is difficult to reproduce without the necessary, often expensive, equipment. I've worked with electronics and the like quite a bit myself, and can see some parts being replaced by more simple, cheaper circuits, but other parts (i.e., the transducer) will still cost a few grand.

And to accurately measure what is going on would require a CT or MRI in order to achieve a resolution fine enough to make out small modulations in neurotransmission caused by LILFU.

I think we just need a transducer, and just zap it at our foreheads. lol

http://www.parsonicscorp.com/

http://cgi.ebay.ca/HP-21200B-2-5MHz-...3286.m20.l1116

Haha, well if you wanna shell out that kind of money, be my guest. I'm just as interested as anyone else =]

I found a website that makes custom Ultrasonic Transdcucers. Check it out

http://www.piezotechnologies.com/dow...FQJNagodIlsc4A

Originally Posted by Ailos

Haha, well if you wanna shell out that kind of money, be my guest. I'm just as interested as anyone else =]

Hey Ailos, sorry to bother you but what does low intensity "pulsed" ultrasound mean?

Secondly, is "pulsed" ultrasound what hey used in the experiment?

Pulsed refers to the length of time the ultrasound was active. I believe in this experiment the pulse was the length of mere milliseconds, or less, but it should specify the length in the study. So the ultrasonic frequency has nothing to do with the pulse length. This is important since the focused vibrations generate heat, and consequently can damage tissue if it becomes exposed for too long (higher ultrasonic frequencies and higher amplitudes [power] are actually used to destroy tissues within the body).

I'm thinking the effects of neural excitation had lasted longer than the actual pulse length, but how long this latent effect lasted I'm not clear on.

And I do believe I read that they had, in fact, used pulsed ultrasound at a variety of pulse lengths.

Ive read the study man time over and from what Ive read the Ultrasonic Transducers had the following Properties.

Frequency: 0.44 MHz
Tone Burst Duration (TBD): 22.7 microseconds
Cycles per tone-burst (c/tb): 10
Pulse Repetition Frequency (PRF): 0-100Hz linear sweep over a 5 second period
Number of tone burst per stimulus (Ntb): 250
P-P Square Wave amplitude: 500 mV

Im having trouble understanding the last three, can you help explain what they mean/refer to.

Thanks Ailos