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FIG 6. A and B, Imaging anatomy of the posterior lobule on sagittal T2-weighted MR images in a 13-year-old girl (A) and a 26-year-old man (B). In A, the ALG (A) and PLG (P) are well formed and distinct, correlating with Fig 1C. In B, ALG (A) and PLG (P) are poorly separated. PLG appears to bud off the posterior aspect of the ALG, giving the posterior lobule a branched configuration, such as seen in Fig 1B. Note the convergence of the short insular gyri to form the apex (asterisk in B) as seen in Fig 1B, the course of the CS posteroinferior to the apex en route to the stem of the sylvian fissure, the relationship of the pole of the posterior lobule to the limen, and the relationship of the HG (H) to both the PLG and the entire posterior lobule.
