ORIGINAL ARTICLE
MORPHOLOGICAL VARIANCE AND RELATED TAXONOMY OF THE PLANUM TEMPORALE
Bryan M. Wong 1, A-F  
,   Frank E. Musiek 1, A,D-E,G  
 
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Speech, Language, and Hearing Sciences, The University of Arizona, United States
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article;
CORRESPONDING AUTHOR
Bryan M. Wong   

Speech, Language, and Hearing Sciences, The University of Arizona, 1131 E. 2nd St., 85721, Tucson, United States
Submission date: 2020-05-22
Final revision date: 2020-08-10
Acceptance date: 2020-10-16
Publication date: 2020-12-31
 
J Hear Sci 2020;10(4):9–19
 
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ABSTRACT
Background:
The planum temporale (PT) is well known for its classic “pie-shaped” morphology. The aim of this study is to create a taxonomy of PT morphological features to improve its sometimes difficult identification and differentiation from surrounding structures.

Material and methods:
A total of 50 normal, high-resolution T1-weighted brain MRIs (100 hemispheres) were obtained from the Open Access Series of Imaging Studies (OASIS) repository. Ages ranged from 18 to 57 years.

Methods:
A 3D cortical surface mesh (grey matter) was generated using neuroimaging software. The PT was isolated based on pre-defined criteria and stratified into different classifications. Quantitative measurements were also taken.

Results:
A total of four PT configurations were identified: (1) Pie-shaped [45%], 508.8 mm2; (2) Trapezoid-shaped [27%], 540.4 mm2, (3) Rectangular-shaped [19%], 477.7 mm2; and (4) Amorphous/none [9%], not calculable. The trapezoid-shaped PT category occurred significantly more often in females.

Conclusions:
The proposed classification is the first step in creating a comprehensive.