Igor Suman

Thank you for replying Glider and informing me that the book you mentioned does not not contain the information I require, (had you not replied I would have bought a copy and wasted £50) . I would be happy to spend time and money to obtain a textbook which did contain the diagram I require. If any readers have an anatomy textbook which does show the triangular marking on the thumb could they please post the image here. I will buy the book from you at twice its face value, or pay you a similar sum as a "finders fee". My email address is: CHEVRON1010@YAHOO.CO.UK

Hi Glider, Could you comment as to whether the diagrams in your textbook have any structure which corresponds to the triangular marking in the above photograph: I do not wish to expend time and money trying to obtain a copy of the book you mention if it does not contain the information I require.

Hi "intothevoidx", thank you for trying to find the neurology diagram I require. Hi Glider, if the textbook images you refer to resemble this:- could you please be a "superman" and either post the textbook image here, or email me a scan (jpg). Email to: CHEVRON1010@YAHOO.CO.UK

Over a fortnight and no replies... Do SFN anatomists know their gluteals from their olecranon ?

The geometric marking is subtle' date=' (see colour image), contrast enhancement was necessary to provide a clear image of this phenomenon. I suspect that the patterns are vasoconstriction local to demyelinated touch-sensation neuroanatomy. The boldest areas of blanching correspond with the areas of the thumb used in its principal actions: pinch and grip: areas which consequently have increased sensation. If I could obtain diagrams showing the neuroanatomy of the thumb they would be useful to identify this disease process, hence my request at the start of this thread. How about trying to help me find this information, Ashennell, (or anyone else) ?

Q: I'm intrigued though, may I ask what you want this for? A: [The monochrome images are contrast enhanced.]

I am trying to find a diagram which shows the distribution of sensors in the human thumb, analogous to diagrams of the tongue which map the position of sweet, salt and sour sensors, but which shows the distribution of sensors in the thumb, e.g. touch sensors (Meissner's, Merkel's, Ruffini's & Pancian), temperature sensors (hot & cold), and pain sensors (fast & slow nociceptors). If anyone knows where I can find this diagram of thumb neuroanatomy on the web could they please post the details here and/or send me a personal message with a link to this information. Thank you.

Required conditions for standing waves:- 1. Medium to conduct waves. 2. A source of SHM. 3. Reflection of waves. 1. MEDIUM:- The gas of the protoplanetary disc would have been tenuous, a fraction of the density of Earth’s atmosphere, but nevertheless capable of conducting pressure waves. 2. SHM:- An oblate precessing sun would send out SHM waves into the protoplanetary disc. Imagine a spinning top in the center of a child’s paddling pool with a few centimetres of water in it: the precessing top would send out SHM waves into the water. 3. REFLECTION:- The edge of the protoplanetary disc would reflect any waves which reached it back to the center of the disc. This may seem anti-intuitive but it is true. Try holding a 150cm length of rope by one end and waggling it back and forth to create waves, standing waves (nodes) will appear in the rope. The free (dangling) end of the rope must have reflected the waves for nodes to form. The edge of the protoplanetary disc is analogous to the free end of the rope and would reflect any waves which reached it. So the three conditions for standing waves (nodes) to exist in the protoplanetary disc are satisfied. Should I hire "tails" from Moss Bros ?

We will soon find out how rodents cope in space:- " In 2006 a group of mice-astronauts will orbit Earth inside a spinning spacecraft. Their mission: to learn what its like to live on Mars." http://science.nasa.gov/headlines/y2004/20jan_marsmice.htm In space no-one can hear you squeak

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Ashennell said "Parasthesia is a specific name for a somatosensory condition. I don't think you can apply it to other senses such as the olfactory system". Why not apply the term "paresthesia" to other all senses ?, e.g. Tinnitus is "auditory paresthesia", so why is the phrase "olfactory paresthesia" unapplicable ?.

The concentric nodes in a disc of uniform thickness are equally spaced:- The protoplanetary disc was not of uniform thickness: it would be thinner towards the edge, producing nodes which were increasingly far apart.

In Chladni figures on a circular plate, material accumulates at the nodes which can take the form of concentric circles. Couldn’t a similar process have occurred in the proto-planetary disc of gas & dust ?. Vibrations from a slowly rotating, ( & precessing ?), sun sending out waves into the proto-planetary disc. This would create nodes where material would accumulate as in Chladni figures. These concentric nodes would seed planet formation and become the orbits of the planets. This could explain the geometric pattern of orbits in the Titus-Bode "law". According to Wikipedia:- "There is no solid theoretical explanation of the Titius-Bode law, and it is not known whether this is just a numerical coincidence or a more fundamental cosmological rule." http://en.wikipedia.org/wiki/Bodes_law Should I expect a telephone call from Stockholm ?

As YT2095 says, a weakened blood vessel is the most probable cause. However an alternative explanation would be a blood clotting problem, e.g. vitamin K deficiency (not eating your greens), or thrombocytopenia caused by medication.

I have sciatica, this is a referred pain in my buttock&thigh due to compression of the sciatic nerve where it enters the spine. According to your definition (above) sciatica is a hallucination, (it is actually dysethesia). Surely only false sensations which are psychogenic can be described as hallucinations.

I am trying to find a diagram which shows the distribution of sensors in the human thumb, analogous to diagrams of the tongue which map the position of sweet, salt and sour sensors, but which shows the distribution of sensors in the thumb, e.g. touch sensors (Meissner's, Merkel's, Ruffini's & Pancian), temperature sensors (hot & cold), and pain sensors (fast & slow nociceptors). If anyone knows where I can find this diagram of thumb neuroanatomy on the web could they please post the details here and/or send me a personal message with a link to this information. Thank you.

http://www.hhmi.org/cgi-bin/askascientist/highlight.pl?kw=&file=answers%2Fstructure%2Fans_014.html

"Do any of you out there know if there is such a thing called smell illusions?" There are false sensations (paresthesia) of smell, e.g. some people experience a false smell of burning when they have a stroke or TIA.