Motivation and Motor Control: Hemispheric Specialization for Approach Motivation Reverses with Handedness
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{"title"=>"Motivation and motor control: Hemispheric specialization for approach motivation reverses with handedness", "type"=>"journal", "authors"=>[{"first_name"=>"Geoffrey", "last_name"=>"Brookshire", "scopus_author_id"=>"55201278000"}, {"first_name"=>"Daniel", "last_name"=>"Casasanto", "scopus_author_id"=>"6507949013"}], "year"=>2012, "source"=>"PLoS ONE", "identifiers"=>{"sgr"=>"84860371198", "doi"=>"10.1371/journal.pone.0036036", "pui"=>"364709154", "pmid"=>"22563436", "scopus"=>"2-s2.0-84860371198", "issn"=>"19326203", "isbn"=>"1932-6203"}, "id"=>"39941702-0795-3188-89e9-ca15d2cccb2a", "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.", "link"=>"http://www.mendeley.com/research/motivation-motor-control-hemispheric-specialization-approach-motivation-reverses-handedness", "reader_count"=>121, "reader_count_by_academic_status"=>{"Unspecified"=>3, "Professor > Associate Professor"=>1, "Librarian"=>1, "Researcher"=>18, "Student > Doctoral Student"=>7, "Student > Ph. D. Student"=>29, "Student > Postgraduate"=>9, "Student > Master"=>13, "Other"=>3, "Student > Bachelor"=>27, "Lecturer"=>3, "Lecturer > Senior Lecturer"=>1, "Professor"=>6}, "reader_count_by_user_role"=>{"Unspecified"=>3, "Professor > Associate Professor"=>1, "Librarian"=>1, "Researcher"=>18, "Student > Doctoral Student"=>7, "Student > Ph. D. Student"=>29, "Student > Postgraduate"=>9, "Student > Master"=>13, "Other"=>3, "Student > Bachelor"=>27, "Lecturer"=>3, "Lecturer > Senior Lecturer"=>1, "Professor"=>6}, "reader_count_by_subject_area"=>{"Unspecified"=>7, "Agricultural and Biological Sciences"=>13, "Arts and Humanities"=>4, "Business, Management and Accounting"=>3, "Computer Science"=>4, "Decision Sciences"=>1, "Nursing and Health Professions"=>8, "Medicine and Dentistry"=>7, "Neuroscience"=>5, "Sports and Recreations"=>2, "Psychology"=>56, "Social Sciences"=>4, "Linguistics"=>6, "Physics and Astronomy"=>1}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>7}, "Social Sciences"=>{"Social Sciences"=>4}, "Decision Sciences"=>{"Decision Sciences"=>1}, "Sports and Recreations"=>{"Sports and Recreations"=>2}, "Psychology"=>{"Psychology"=>56}, "Physics and Astronomy"=>{"Physics and Astronomy"=>1}, "Unspecified"=>{"Unspecified"=>7}, "Arts and Humanities"=>{"Arts and Humanities"=>4}, "Neuroscience"=>{"Neuroscience"=>5}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>13}, "Computer Science"=>{"Computer Science"=>4}, "Business, Management and Accounting"=>{"Business, Management and Accounting"=>3}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>8}, "Linguistics"=>{"Linguistics"=>6}}, "reader_count_by_country"=>{"Canada"=>2, "Ecuador"=>1, "Colombia"=>1, "United States"=>5, "Finland"=>1, "Italy"=>1, "Chile"=>1, "Switzerland"=>1, "Germany"=>1, "Spain"=>1}, "group_count"=>6}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/647193"], "description"=>"<p>(<b>A</b>) Scalp topography of the statistical significance of the Approach Motivation×Hemisphere interaction on resting alpha-band power, computed and plotted separately in left-handers (left side) and right-handers (right side). Because this plot shows an interaction across hemispheres, each handedness group's topography is mirrored across the mid-sagittal line, and is therefore plotted on only one hemisphere. (<b>B</b>) Scalp topography of the statistical significance of the 3-way Approach Motivation×Hemisphere×Handedness interaction in right- and left-handers. This interaction is significant at 10 pairs of electrodes (<i>p</i><.01). The highlighted electrodes were used for the analyses reported in the main text.</p>", "links"=>[], "tags"=>["specialization", "affective", "depends"], "article_id"=>317685, "categories"=>["Physiology", "Neuroscience", "Mental Health"], "users"=>["Geoffrey Brookshire", "Daniel Casasanto"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0036036.g001", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Hemispheric_specialization_for_affective_motivation_depends_on_handedness_/317685", "title"=>"Hemispheric specialization for affective motivation depends on handedness.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-04-26 02:08:05"}
  • {"files"=>["https://ndownloader.figshare.com/files/647307"], "description"=>"<p>Asymmetries in <i>ln</i>-transformed alpha power are plotted for each subject as a function of BAS score. Asymmetry scores plotted here were computed as: (Left-hemisphere−Right-hemisphere)/(Left-hemisphere+Right-hemisphere). More positive values denote higher left hemisphere alpha power (and therefore less activity in the left hemisphere than in the right hemisphere). Alpha power for this plot was measured at the electrodes circled in <b>fig. 1</b>.</p>", "links"=>[], "tags"=>["alpha", "asymmetry", "right-"], "article_id"=>317810, "categories"=>["Physiology", "Neuroscience", "Mental Health"], "users"=>["Geoffrey Brookshire", "Daniel Casasanto"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0036036.g002", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Associations_between_alpha_power_asymmetry_and_approach_motivation_in_right_and_left_handers_/317810", "title"=>"Associations between alpha power asymmetry and approach motivation in right- and left-handers.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-04-26 02:10:10"}
  • {"files"=>["https://ndownloader.figshare.com/files/333018", "https://ndownloader.figshare.com/files/333067"], "description"=>"<div><h3>Background</h3><p>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 <em>Sword and Shield Hypothesis</em> (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).</p> <h3>Methodology/Principal Findings</h3><p>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.</p> <h3>Conclusions</h3><p>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.</p> </div>", "links"=>[], "tags"=>["hemispheric", "specialization", "reverses", "handedness"], "article_id"=>125770, "categories"=>["Physiology", "Neuroscience", "Mental Health"], "users"=>["Geoffrey Brookshire", "Daniel Casasanto"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0036036.s001", "https://dx.doi.org/10.1371/journal.pone.0036036.s002"], "stats"=>{"downloads"=>10, "page_views"=>17, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Motivation_and_Motor_Control_Hemispheric_Specialization_for_Approach_Motivation_Reverses_with_Handedness/125770", "title"=>"Motivation and Motor Control: Hemispheric Specialization for Approach Motivation Reverses with Handedness", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2012-04-26 01:36:10"}

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  • {"unique-ip"=>"9", "full-text"=>"13", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2018", "month"=>"10"}
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  • {"unique-ip"=>"13", "full-text"=>"16", "pdf"=>"5", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"3", "cited-by"=>"0", "year"=>"2018", "month"=>"7"}
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  • {"unique-ip"=>"18", "full-text"=>"25", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"9"}
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  • {"unique-ip"=>"7", "full-text"=>"10", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"3"}
  • {"unique-ip"=>"5", "full-text"=>"5", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"4"}
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Relative Metric

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