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Can any one suggest a good article about features of EEG of left-handed people?

I was surprised when find that there are only few old articles about it. I find only one new article by Propper, Ruth E., et al. (2012). Maybe I miss something.

Propper, R. E., Pierce, J., Geisler, M. W., Christman, S. D., & Bellorado, N. (2012). Asymmetry in Resting Alpha Activity: Effects of Handedness. Open Journal of Medical Psychology, 1(4), 86-90.

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I haven't read that, but they're likely going to just be correlations that may have little to do with the actual "handedness" difference. Look into hearing, as a small percentage of left-handed people have their dominant cortices for speech and language shifted to the other side. This is not a reliable indicator, though, as even most left handed people have the same placement of Broca's area, etc. –  Chuck Sherrington Mar 18 '13 at 23:01
    
It does not matter. I don't interesting in language or motor areas specifically. Not-right handedness is an indicator of not normal (alternative) development of the brain. It must have correlates in EEG. –  sviter Mar 19 '13 at 7:38
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"It must have correlates in EEG" -- No. It must have some neural correlate. EEG can capture only a small percentage of behavioral phenomena due to its relatively course spatial frequency and inability to record activity in more medial brain regions. I'd broaden your search accordingly; perhaps that will lead to more relevant literature. –  zergylord Mar 20 '13 at 23:00

1 Answer 1

Abstract

Background

According to decades of research on affective motivation in the human brain, approach motivational states are supported primarily by the left hemisphere and avoidance states by the right hemisphere. The underlying cause of this specialization, however, has remained unknown. Here we conducted a first test of the Sword and Shield Hypothesis (SSH), according to which the hemispheric laterality of affective motivation depends on the laterality of motor control for the dominant hand (i.e., the “sword hand," used preferentially to perform approach actions) and the nondominant hand (i.e., the “shield hand," used preferentially to perform avoidance actions).

Methodology/Principal Findings

To determine whether the laterality of approach motivation varies with handedness, we measured alpha-band power (an inverse index of neural activity) in right- and left-handers during resting-state electroencephalography and analyzed hemispheric alpha-power asymmetries as a function of the participants' trait approach motivational tendencies. Stronger approach motivation was associated with more left-hemisphere activity in right-handers, but with more right-hemisphere activity in left-handers.

Conclusions

The hemispheric correlates of approach motivation reversed between right- and left-handers, consistent with the way they typically use their dominant and nondominant hands to perform approach and avoidance actions. In both right- and left-handers, approach motivation was lateralized to the same hemisphere that controls the dominant hand. This covariation between neural systems for action and emotion provides initial support for the SSH.

Citation: Brookshire G, Casasanto D (2012) Motivation and Motor Control: Hemispheric Specialization for Approach Motivation Reverses with Handedness. PLoS ONE 7(4): e36036. doi:10.1371/journal.pone.0036036

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