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(A) Normalized area of CC regions and standard error (SE) in young adults (YA) and older adults (OA). The CC is divided into seven regions: (1) rostrum, (2) genu, (3) rostral truncus, (4) anterior intermediate truncus, (5) posterior intermediate truncus, (6) isthmus, (7) splenium. (B) Mean cross sectional area of the entire CC and SE. Asterisk indicates significant group differences at p < 0.05.
