Friday, April 06, 2018
Random contralateral thoughts
In the neurology courseware I'm working on, there's a lot of discussion about contralateral vs ipsilateral innervation. Got me thinking about the topic, so I noticed something.
When I get dressed, my upper and lower parts are contralateral. On upper-body items (t-shirt, shirt, coat, gloves) the right arm goes in first. On lower-body items (underpants, pants, socks, shoes) the left leg goes in first.
I'm left-handed and generally left-dominant, so why does the upper body dress the other way? This doesn't correspond to the ipsi and contra of the nerves; all of the crossovers for arms and legs work the same way. Left hemisphere controls all of the right side below the neck, right hemisphere controls all of the left side below the neck.
Undressing is less consistent, because most things come off 'vertically', not one side first.
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Good rain yesterday, lots of earthworms on the street today. Worms are a pretty good meter for soil health. The street in front of the organic ex-hippie's garden is PACKED with worms. The street in front of Hank Hill's over-chemicalized precisely trimmed green carpet is perfectly wormless. Ordinary semi-maintained lawns (like mine) are in between.
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Time to give up reading quora.com. It was sort of interesting for a while, but it's classically addictive. Just enough positive to keep you locked in, then it slaps you down with a GOTCHA, then you come back hoping for more positive to cure the GOTCHA. I don't need that sort of input. Enough. Done.
Labels: Metrology, Nonzero problems, Zero Problems
¶ 9:17 AM
