The bizareness of colour

When I think of the presentation of sound at the phenomenal level of experience, its phenomenological character makes sense. Sound is perceived when air vibrates the ear drum and is transduced to a neural signal and processed; and sound does indeed often have a qualitatively vibrational character, particularly when the frequency is very low. Similarly with spatio-temporal vision, the pattern of light hitting the retina is transduced into neural signal and processed leading to a spatio-temporal phenomenological world. Of course there is still some strangeness from the phyiscal to phenomenal level in these percepts; but at least there is some understandable qualatative aquaintance.

Colour is a truely bazare percept. The differences of colour are due to the differences in wavelength (vibrational energy in a sense) of light entering the visual system. Why then should colour not be phenomenally perceived as somthing like different fuzzing surfaces (like static television)? Perhaps its because of the incredible speed of the electromagnetic vibrations that means colour is just experienced as... well like it is! Or perhaps its because of colours functional role; some suggest it evolved so that we could detect fruit in the trees. Hence a vibrational sensation might be confused with movement (I'm not convinced this would matter if it was fuzzing that fast). Nonetheless it does seem a very odd sensation; blue is so different from yellow in such a strong way, yet its difference in physical stimulus is merely a few hundred nanometres of electromagnetic wavelength.

Feeding the brain

It is interesting to note that it is perhaps our brain’s close proximity (i.e. in the skull) to most of our sensory apparatus, such as our eyes and ears, that we have the intuitive and somewhat phenomenal feeling that we are in our brains. Who knows perhaps if all our sense organs were around our belly it would feel like we were feeding our brain every time we ate.

Just a silly little quirk I came up with whilst writing my dissertation.

Emtotiv headset

By Xmas people will be able to buy a headset for £150 that enables you to control virtual objects on a computer screen using the power of your mind. It works by taking input from your brain waves and sending it to the computer for processing. Here are a couple of videos of it in action. The hand movements are just for show apparantly. In the second video the Emotiv team use the same technology to control a toy UFO. It all really highlights the pace of technology's acceleration. Check it out:

http://www.youtube.com/watch?v=YxMux4uEkLI&NR=1

http://www.youtube.com/watch?v=0TKhPZAhlLA&feature=related

IPlant

I recently came across a very interesting article on the IPlant currently under devlopment by Chris Harris, a researcher at the University of Sussex. It outlines the IPlane, a electrochemical chip inserted into the brain, which could enable treatment of certain mental illnesses, by directly stimulating the brain in a similar way to deep brain stimulation. For example by having it wirelessly connected to a sensor in a shoe, running triggers small bursts of dopamine, so that the user feels motivated to run. From what I understand this has actually already been tested on humans and works. Other implications include simulating serotonine areas of the brain to treat anxiety and depression, and in the more distant future directly stimulating visual and auditory areas to produce internalised visual and auditory experiences. Imagine watching a movie with yours eyes closed; pretty crazy stuff although scary for many. It also highlights some of the related ethical issues. Well worth a read.

http://ieet.org/index.php/IEET/more/harris20080112/