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Harman [31]
3 years ago
6

Why are some people left handed and some right handed

Biology
1 answer:
notka56 [123]3 years ago
4 0

Arm and hand movements start in the brain, in an area called the motor cortex, which sends a signal to the spinal cord that's translated into a motion. The researchers found that while the fetus is growing in the womb, up until about 15 weeks, the motor cortex and the spinal cord are not yet connected, but right- or left-handedness has already been determined.

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