Fun with motor nerves

This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.

Febrifuge

Grizzled Old Newcomer
7+ Year Member
15+ Year Member
Joined
May 7, 2003
Messages
1,520
Reaction score
25

Members don't see this ad.
While sitting in your chair, raise your right foot off the floor a little and make circular motions, in a clockwise direction.

While you repeat that motion, with your right hand trace the shape of the number 6 in the air.

See what your right foot does...

.

.

.

.

.

In most people, the right foot changes direction and starts moving counter-clockwise.

It's fun for parties, but could someone venture an explanation as to what's going on neurologically? I'm curious to hear.

Feb
ER Tech nerd
 

tofurious

Senior Member
7+ Year Member
15+ Year Member
Joined
Mar 7, 2003
Messages
576
Reaction score
7
You could do the same thing by raising both of your hands up in the air and drawing circles (or complex patterns) with your dominant hand. It's just the corpus callosum letting the other side of the brain know what's going on. Frequently you have to suppress the other side from doing this, and in some people with stroke or other degenerative conditions the inhibitory circuits are off and they present with the alien limb phenomenon.
 
Top