MORPHOLOGIC CEREBRAL ASYMMETRIES AND HANDEDNESS - THE PARS TRIANGULARIS AND PLANUM TEMPORALE
MORPHOLOGIC CEREBRAL ASYMMETRIES AND HANDEDNESS - THE PARS TRIANGULARIS AND PLANUM TEMPORALE
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DOI：
10.1001/archneur.1995.00540290091023
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发表时间：
1995-05-01
影响因子：
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通讯作者：
HEILMAN, KM
中科院分区：
文献类型：
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作者：
FOUNDAS, AL;LEONARD, CM;HEILMAN, KM
目的：通过对健康的右利手和左撇子受试者进行三维梯度回波磁共振成像扫描，探讨三角部（PTr）和颞平面（PT）的形态学大脑不对称性之间的关系。设计：（盲法）比较健康的右利手和左撇子受试者接受磁共振成像。设置：Seimens 1-T磁电机（Seimens，Iselin，NH）在盖恩斯维尔的佛罗里达大学健康科学中心进行。受试者：健康的右利手（n=8）和左撇子（n=8）受试者，年龄、性别和教育水平相匹配。主要结果测量：（1）PTr的平均长度（前升支和前降支），（2）PT的平均长度，（3）不对称性（左+右）（4）PTr和PT的联合不对称性。右利手被试的PTr和PT存在显著的不对称性，而左利手被试的PTr和PT不存在显著的不对称性。当计算PTr和PT的联合不对称商时，右利手的受试者具有双不对称性左利手的受试者中，左利手与右利手相等（87.5%[n=7]）或左利手与右利手相等（12.5%[n=1]），左利手受试者中，左利手不对称（62.5%[n=5]）、左利手与右利手相等（12.5% [n=1]）或左利手不对称（Z5% [n=2]）。在左撇子科目，写作姿势似乎预测这些组合的不对称concurents，即，左撇子科目使用倒置的写作姿势有一个不对称和左撇子科目使用非倒置的写作姿势有一个不对称的perisylvian语音语言regions.Conclusions：在三维，梯度回波，磁共振成像扫描，我们发现了一个显着的不对称的PTR和PT。当被试分为右利手和左撇子时，前者的PTr和PT具有显著的不对称性，而后者则没有。PTr和PT的测量似乎是已知的功能不对称的perisylvian语音语言区域的重要指标。
Objective: To explore the relationship between morphologic cerebral asymmetries of the pars triangularis (PTr) and the planum temporale (PT) measured on three-dimensional, gradient-echo, magnetic resonance imaging scans of healthy right- and left-handed subjects.Design: (Blinded) comparison of healthy right- and left handed subjects who underwent magnetic resonance imaging.Setting: The Seimens 1-T Magnetom (Seimens, Iselin, NH) at the University of Florida Health Science Center, Gainesville.Subjects: Healthy right-handed (n=8) and left-handed (n=8) subjects matched for age, sex, and educational level.Main Outcome Measures: (1) Average length of the PTr (anterior ascending and anterior descending rami), (2) average length of the PT, (3) asymmetry quotients {[left-right]/[(left+right) (0.5)]} of the PTr and PT, and (4) combined asymmetry quotients of the PTr and PT.Results: There was a significant leftward asymmetry of the PTr and PT in the right-handed subjects, but there was no significant asymmetry in the left-handed subjects. When the combined asymmetry quotient of the PTr and PT was calculated, the right-handed subjects had a leftward asymmetry (87.5% [n=7]) or left was equal to right (12.5% [n=1]), and the left-handed subjects had a leftward asymmetry (62.5% [n=5]), left was equal to right (12.5% [n=1]), or a rightward asymmetry(Z5% [n=2]). In the left-handed subjects, writing posture seemed to predict these combined asymmetry quotients, ie, left-handed subjects using an inverted writing posture had a leftward asymmetry and left-handed subjects using a noninverted writing posture had a rightward asymmetry of the perisylvian speech-language regions.Conclusions: On three-dimensional, gradient-echo, magnetic resonance imaging scans, we found a significant leftward asymmetry of the PTr and PT. When the groups were divided into right- and left-handed subjects, the former had a significant leftward asymmetry of the PTr and PT, while the latter did not. Measurements of the PTr and PT appear to be important indexes of the known functional asymmetries of the perisylvian speech-language regions.