Chimpanzee (Pan troglodytes) Precentral Corticospinal System Asymmetry and Handedness: A Diffusion Magnetic Resonance Imaging Study
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{"title"=>"Chimpanzee (Pan troglodytes) precentral corticospinal system asymmetry and handedness: A diffusion magnetic resonance imaging study", "type"=>"journal", "authors"=>[{"first_name"=>"Longchuan", "last_name"=>"Li", "scopus_author_id"=>"55655816300"}, {"first_name"=>"Todd M.", "last_name"=>"Preuss", "scopus_author_id"=>"7004565862"}, {"first_name"=>"James K.", "last_name"=>"Rilling", "scopus_author_id"=>"7003790471"}, {"first_name"=>"William D.", "last_name"=>"Hopkins", "scopus_author_id"=>"7201639143"}, {"first_name"=>"Matthew F.", "last_name"=>"Glasser", "scopus_author_id"=>"23984503800"}, {"first_name"=>"Bhargav", "last_name"=>"Kumar", "scopus_author_id"=>"7401973222"}, {"first_name"=>"Roger", "last_name"=>"Nana", "scopus_author_id"=>"8423121500"}, {"first_name"=>"Xiaodong", "last_name"=>"Zhang", "scopus_author_id"=>"56179434900"}, {"first_name"=>"Xiaoping", "last_name"=>"Hu", "scopus_author_id"=>"55579203100"}], "year"=>2010, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "pui"=>"359826752", "sgr"=>"77958512047", "doi"=>"10.1371/journal.pone.0012886", "scopus"=>"2-s2.0-77958512047", "isbn"=>"1932-6203 (Electronic)\\r1932-6203 (Linking)", "pmid"=>"20877630"}, "id"=>"47c0c13e-edac-3cf2-9ab0-b3edc5b034cd", "abstract"=>"Most humans are right handed, and most humans exhibit left-right asymmetries of the precentral corticospinal system. Recent studies indicate that chimpanzees also show a population-level right-handed bias, although it is less strong than in humans.", "link"=>"http://www.mendeley.com/research/chimpanzee-pan-troglodytes-precentral-corticospinal-system-asymmetry-handedness-diffusion-magnetic-r", "reader_count"=>33, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Professor > Associate Professor"=>5, "Researcher"=>6, "Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>10, "Student > Postgraduate"=>5, "Student > Master"=>1, "Student > Bachelor"=>1, "Professor"=>3}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Professor > Associate Professor"=>5, "Researcher"=>6, "Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>10, "Student > Postgraduate"=>5, "Student > Master"=>1, "Student > Bachelor"=>1, "Professor"=>3}, "reader_count_by_subject_area"=>{"Unspecified"=>2, "Engineering"=>3, "Biochemistry, Genetics and Molecular Biology"=>1, "Agricultural and Biological Sciences"=>14, "Medicine and Dentistry"=>5, "Neuroscience"=>2, "Psychology"=>4, "Social Sciences"=>1, "Computer Science"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>3}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>5}, "Neuroscience"=>{"Neuroscience"=>2}, "Social Sciences"=>{"Social Sciences"=>1}, "Psychology"=>{"Psychology"=>4}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>14}, "Computer Science"=>{"Computer Science"=>1}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Unspecified"=>{"Unspecified"=>2}}, "reader_count_by_country"=>{"Hungary"=>1, "Belgium"=>1, "United States"=>5, "France"=>1}, "group_count"=>0}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/829944"], "description"=>"<p>The four representative axial slices from one subject corresponding to “hand knob” (CS4) are shown on the right side.</p>", "links"=>[], "tags"=>["asymmetry", "quotients", "cs", "10", "numbered", "inferior", "plotted", "separately", "chimpanzees"], "article_id"=>500288, "categories"=>["Neuroscience", "Infectious Diseases", "Evolutionary Biology", "Medicine"], "users"=>["Longchuan Li", "Todd M. Preuss", "James K. Rilling", "William D. Hopkins", "Matthew F. Glasser", "Bhargav Kumar", "Roger Nana", "Xiaodong Zhang", "Xiaoping Hu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0012886.g004", "stats"=>{"downloads"=>0, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Mean_asymmetry_quotients_of_the_depth_of_the_CS_and_the_95_confidence_interval_at_10_levels_numbered_from_superior_CS1_to_inferior_CS10_plotted_separately_for_chimpanzees_with_different_handedness_/500288", "title"=>"Mean asymmetry quotients of the depth of the CS and the 95% confidence interval at 10 levels, numbered from superior (CS1) to inferior (CS10), plotted separately for chimpanzees with different handedness.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-09-21 00:04:48"}
  • {"files"=>["https://ndownloader.figshare.com/files/830019"], "description"=>"<p>Mean MD values (×10<sup>−6</sup> cm<sup>2</sup>/s) and standard deviations in the ROIs at the precentral gyrus (PrG), the posterior limb of internal capsule (PLIC), the cerebral peduncle (CP), and over the whole precentral corticospinal tract mask (PCST) for right- and non-right-handed chimpanzees based on the TUBE task.</p>", "links"=>[], "tags"=>["md", "deviations", "rois", "precentral", "gyrus", "posterior", "capsule", "cerebral", "peduncle", "corticospinal", "tract", "right-", "non-right-handed", "chimpanzees"], "article_id"=>500358, "categories"=>["Neuroscience", "Infectious Diseases", "Evolutionary Biology", "Medicine"], "users"=>["Longchuan Li", "Todd M. Preuss", "James K. Rilling", "William D. Hopkins", "Matthew F. Glasser", "Bhargav Kumar", "Roger Nana", "Xiaodong Zhang", "Xiaoping Hu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0012886.t003", "stats"=>{"downloads"=>0, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Mean_MD_values_10_8722_6_cm_2_s_and_standard_deviations_in_the_ROIs_at_the_precentral_gyrus_PrG_the_posterior_limb_of_internal_capsule_PLIC_the_cerebral_peduncle_CP_and_over_the_whole_precentral_corticospinal_tract_mask_PCST_for_right_and_non_right_hande/500358", "title"=>"Mean MD values (×10<sup>−6</sup> cm<sup>2</sup>/s) and standard deviations in the ROIs at the precentral gyrus (PrG), the posterior limb of internal capsule (PLIC), the cerebral peduncle (CP), and over the whole precentral corticospinal tract mask (PCST) for right- and non-right-handed chimpanzees based on the TUBE task.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-09-21 00:05:58"}
  • {"files"=>["https://ndownloader.figshare.com/files/829752"], "description"=>"<p>The figurine on the left shows the positions of the six axial slices. FA statistical maps are superimposed on the mean FA skeletons, voxels shaded green are those for which FA exceeds threshold (FA>0.3). The colors superimposed on these maps indicate FA asymmetries, with red denoting left>right FA and blue denoting right>left FA. The red and blue pixels are enlarged for emphasis. Extensive left>right FA was found at the precentral gyrus. No right>left FA that is relevant to the corticospinal system was detected. CS: central sulcus; PLIC: posterior limb of internal capsule; CP: cerebral peduncle.</p>", "links"=>[], "tags"=>["hemisphere", "fa", "precentral", "corticospinal"], "article_id"=>500106, "categories"=>["Neuroscience", "Infectious Diseases", "Evolutionary Biology", "Medicine"], "users"=>["Longchuan Li", "Todd M. Preuss", "James K. Rilling", "William D. Hopkins", "Matthew F. Glasser", "Bhargav Kumar", "Roger Nana", "Xiaodong Zhang", "Xiaoping Hu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0012886.g002", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_TBSS_analysis_of_the_relationship_between_hemisphere_and_FA_in_the_precentral_corticospinal_system_/500106", "title"=>"TBSS analysis of the relationship between hemisphere and FA in the precentral corticospinal system.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-09-21 00:01:46"}
  • {"files"=>["https://ndownloader.figshare.com/files/830085"], "description"=>"<p>Mean FA values and standard deviations in the ROIs at the precentral gyrus (PrG), the posterior limb of internal capsule (PLIC), the cerebral peduncle (CP), and over the whole precentral corticospinal tract mask (PCST) for right- and non-right-handed chimpanzees based on the TUBE task.</p>", "links"=>[], "tags"=>["fa", "deviations", "rois", "precentral", "gyrus", "posterior", "capsule", "cerebral", "peduncle", "corticospinal", "tract", "right-", "non-right-handed", "chimpanzees"], "article_id"=>500431, "categories"=>["Neuroscience", "Infectious Diseases", "Evolutionary Biology", "Medicine"], "users"=>["Longchuan Li", "Todd M. Preuss", "James K. Rilling", "William D. Hopkins", "Matthew F. Glasser", "Bhargav Kumar", "Roger Nana", "Xiaodong Zhang", "Xiaoping Hu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0012886.t002", "stats"=>{"downloads"=>0, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Mean_FA_values_and_standard_deviations_in_the_ROIs_at_the_precentral_gyrus_PrG_the_posterior_limb_of_internal_capsule_PLIC_the_cerebral_peduncle_CP_and_over_the_whole_precentral_corticospinal_tract_mask_PCST_for_right_and_non_right_handed_chimpanzees_bas/500431", "title"=>"Mean FA values and standard deviations in the ROIs at the precentral gyrus (PrG), the posterior limb of internal capsule (PLIC), the cerebral peduncle (CP), and over the whole precentral corticospinal tract mask (PCST) for right- and non-right-handed chimpanzees based on the TUBE task.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-09-21 00:07:11"}
  • {"files"=>["https://ndownloader.figshare.com/files/412862", "https://ndownloader.figshare.com/files/412876", "https://ndownloader.figshare.com/files/412883", "https://ndownloader.figshare.com/files/412889", "https://ndownloader.figshare.com/files/412895"], "description"=>"<div><h3>Background</h3><p>Most humans are right handed, and most humans exhibit left-right asymmetries of the precentral corticospinal system. Recent studies indicate that chimpanzees also show a population-level right-handed bias, although it is less strong than in humans.</p><h3>Methodology/Principal Findings</h3><p>We used <em>in vivo</em> diffusion-weighted and T1-weighted magnetic resonance imaging (MRI) to study the relationship between the corticospinal tract (CST) and handedness in 36 adult female chimpanzees. Chimpanzees exhibited a hemispheric bias in fractional anisotropy (FA, left>right) and mean diffusivity (MD, right>left) of the CST, and the left CST was centered more posteriorly than the right. Handedness correlated with central sulcus depth, but not with FA or MD.</p><h3>Conclusions/Significance</h3><p>These anatomical results are qualitatively similar to those reported in humans, despite the differences in handedness. The existence of a left>right FA, right>left MD bias in the corticospinal tract that does not correlate with handedness, a result also reported in some human studies, suggests that at least some of the structural asymmetries of the corticospinal system are not exclusively related to laterality of hand preference.</p></div>", "links"=>[], "tags"=>["chimpanzee", "precentral", "corticospinal", "asymmetry", "diffusion", "resonance", "imaging"], "article_id"=>141562, "categories"=>["Neuroscience", "Cancer", "Evolutionary Biology", "Medicine"], "users"=>["Longchuan Li", "Todd M. Preuss", "James K. Rilling", "William D. Hopkins", "Matthew F. Glasser", "Bhargav Kumar", "Roger Nana", "Xiaodong Zhang", "Xiaoping Hu"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0012886.s001", "https://dx.doi.org/10.1371/journal.pone.0012886.s002", "https://dx.doi.org/10.1371/journal.pone.0012886.s003", "https://dx.doi.org/10.1371/journal.pone.0012886.s004", "https://dx.doi.org/10.1371/journal.pone.0012886.s005"], "stats"=>{"downloads"=>11, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Chimpanzee_Pan_troglodytes_Precentral_Corticospinal_System_Asymmetry_and_Handedness_A_Diffusion_Magnetic_Resonance_Imaging_Study/141562", "title"=>"Chimpanzee (<em>Pan troglodytes</em>) Precentral Corticospinal System Asymmetry and Handedness: A Diffusion Magnetic Resonance Imaging Study", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2010-09-21 00:26:02"}
  • {"files"=>["https://ndownloader.figshare.com/files/829634"], "description"=>"<p><b>A</b>: Image registration procedure for TBSS: All subjects' FA images were registered on a cohort-specific template (A.i.). A three-stage procedure was used for generating the cohort-specific FA template. First, a randomly selected subject's FA map was aligned so that the midsagittal plane was defined by the interhemispheric fissure of the brain, the axial plane was situated parallel to the bicommissural line (anterior commissure and posterior commissure), and the origin of the space was defined as the center of the anterior commissure. Then, all of the other FA maps were aligned to the first FA map using rigid body registration with six degrees of freedom (A.ii.). The individually aligned FA maps were then averaged to generate a template with six degrees of freedom. Second, the FA template (6 degrees of freedom) was employed as the initial FA template on which each subject's FA map was registered using twelve degrees of freedom affine registration (A.iii.). These were then averaged to create an intermediate FA template (12 degrees of freedom) for the final alignment of the FA maps using nonlinear registration (A.iv.). This population-specific FA template obtained with nonlinear registration was then used as the template for TBSS registration. Then, a symmetrical FA skeleton for each FA image was derived representing the centers of all tracts common to all the chimpanzees (A.v.). FA and FA difference maps derived from the symmetrical FA skeleton were then evaluated with permutation-based statistics to test for left-right differences (A.vi.). <b>B</b>: The locations of the three ROIs in the skeleton-based ROI analysis. <b>C</b>: The cortical mask, waypoint mask and seed mask used in tractography for deriving the precentral corticospinal tract. The schematic in C.i. shows the coverage of the precentral GM/WM boundary cortical masks. C.ii. provides a 2D view of the precentral GM/WM boundary cortical masks at an axial slice, while C.iii. shows the waypoint mask at the posterior limb of internal capsule, and C.iv. shows the seed mask at the level of the pons. <b>D</b>: The schematic of the depth of the CS. The schematic of the CS in a 3D view (D.i.); the intrasulcal length of the posterior contour of the precentral gyrus was traced in a dorso-ventral sequence of 45 slices extending from z = 9∼45 mm covering the primary motor cortex, which was subsequently divided into ten evenly spaced subsections from the most ventral region (CS1) to the most dorsal region (CS10) (D.ii.). The horizontal black bands illustrates the relatively volume covered in each subregion. An example slice at z = 38 mm was shown in D.iii., with the traced depth of the CS denoted as blue color.</p>", "links"=>[], "tags"=>["masks", "cs"], "article_id"=>499994, "categories"=>["Neuroscience", "Infectious Diseases", "Evolutionary Biology", "Medicine"], "users"=>["Longchuan Li", "Todd M. Preuss", "James K. Rilling", "William D. Hopkins", "Matthew F. Glasser", "Bhargav Kumar", "Roger Nana", "Xiaodong Zhang", "Xiaoping Hu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0012886.g001", "stats"=>{"downloads"=>1, "page_views"=>30, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Procedures_for_TBSS_masks_in_tractography_and_measurement_of_CS_depth_/499994", "title"=>"Procedures for TBSS, masks in tractography, and measurement of CS depth.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-09-21 02:46:34"}
  • {"files"=>["https://ndownloader.figshare.com/files/830124"], "description"=>"<p>Note: a) As the sample of mixed-handed subjects was small (n = 6), we classified all of the subjects with z scores less than 1.95 as non-right-handed and the statistics were based on the right-handed group and non-right-handed group.</p>", "links"=>[], "tags"=>["characteristics", "36"], "article_id"=>500490, "categories"=>["Neuroscience", "Infectious Diseases", "Evolutionary Biology", "Medicine"], "users"=>["Longchuan Li", "Todd M. Preuss", "James K. Rilling", "William D. Hopkins", "Matthew F. Glasser", "Bhargav Kumar", "Roger Nana", "Xiaodong Zhang", "Xiaoping Hu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0012886.t001", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Subject_characteristics_of_the_36_chimpanzees_/500490", "title"=>"Subject characteristics of the 36 chimpanzees.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-09-21 00:08:10"}
  • {"files"=>["https://ndownloader.figshare.com/files/829830"], "description"=>"<p><b>A</b>: The location of the corticospinal tracts at different levels of the neuraxis is shown in sets of axial (ax), sagittal (sag), and coronal (cor) slices; the locations of these slices are summarized in the figurine on the left. The major part of the tracts with high tract probability streamed through the corona radiata to arch over the putamen, entered the internal capsule, and then passed through the middle portion of the cerebral peduncle down to the level of the seed mask in the basilar pons. <b>B</b>: Location of the centers of gravity of tract probability in the left and right hemispheres, depicted graphically and in four axial slices. Voxels that met the >0.2% probability threshold for assignment to the corticospinal tract are marked with blue on the slices. The center of gravity was located more anteriorly in the right hemisphere (red dots in the graph) than in the left hemisphere. Pons: basilar pons; CS: central sulcus; PLIC: posterior limb of internal capsule; Thal: Thalamus. <b>C</b>: Plots of hemispheric differences in FA and the 95% confidence intervals in the five equally spaced sections of the corticospinal tract. The left 3D rendering figure shows the lateral view of the precentral corticospinal tracts (thresholded at 0.2%, blue) in an individual T1-weighted image (transparent grey); the coverage of the precentral gyrus mask was outlined in transparent yellow. The middle schematic illustration shows that the precentral corticospinal tract mask (thresholded at 0.2%, blue) were divided into five equally spaced sections ranging from z = 70–150 mm, overlapped on the thresholded mean FA map (FA>0.3, red). The background is the un-thresholded mean FA map of the population.</p>", "links"=>[], "tags"=>["probability", "precentral", "corticospinal", "tracts", "derived", "36"], "article_id"=>500189, "categories"=>["Neuroscience", "Infectious Diseases", "Evolutionary Biology", "Medicine"], "users"=>["Longchuan Li", "Todd M. Preuss", "James K. Rilling", "William D. Hopkins", "Matthew F. Glasser", "Bhargav Kumar", "Roger Nana", "Xiaodong Zhang", "Xiaoping Hu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0012886.g003", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Tract_probability_map_of_the_precentral_corticospinal_tracts_derived_from_36_chimpanzees_/500189", "title"=>"Tract probability map of the precentral corticospinal tracts derived from 36 chimpanzees.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-09-21 00:03:09"}

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