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What makes you a lefty or a righty?
Highlights
It is not the brain that determines whether a person is a lefty or a righty, but the spinal cord, a study has claimed. Until now, it had been assumed that differences in gene activity of the right and left hemisphere might be responsible for a person\'s handedness -- people\'s tendency to naturally favour the use of one hand over the other.Â
​London: It is not the brain that determines whether a person is a lefty or a righty, but the spinal cord, a study has claimed.
Until now, it had been assumed that differences in gene activity of the right and left hemisphere might be responsible for a person's handedness -- people's tendency to naturally favour the use of one hand over the other.
But the recent study demonstrated that gene activity in the spinal cord is asymmetrical already in the womb and could be linked to the handedness of a person.
Arm and hand movements are initiated via the motor cortex in the brain. It sends a corresponding signal to the spinal cord, which in turn translates the command into a motion.
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