Planum temporale asymmetry: In-vivo morphometry affords a new perspective for neuro-behavioral research

High-resolution magnetic resonance (MR) imaging today allows the in vivo quantification of the surface area of the cortex covering the planum temporale and permits assessment of the direction and degree of individual left-right asymmetry of this structure. This methodologic advance is promoting new studies on the biological mechanisms of anatomic and functional lateralization and on the structural accompaniments of disorders such as developmental dyslexia. It is important to stress that studies must agree on the definition and measurement of planum asymmetry, and we review our definition and its justification in the present article.Data obtained from normal subjects supported the assumption that planum (a)symmetry underlies functional lateralization. Thus, familial sinistrality predicted for symmetry of the planum in all eight left-handers studied. The pattern of planum symmetry in the normals was similar to that found in the post mortem studies of dyslexic individuals. Insofar as hand preference and developmental dyslexia are in part genetically transmitted, we suggest that planum symmetry may represent an inherited condition as well. Further-more, even though planum symmetry is part of the anatomic substrate of developmental dyslexia, it is unlikely that it represents a form of developmental anatomic pathology.     

Ludwig Tieck,theatrical reformer

This article, ostensibly on academic practices of reading, writing, and conventioneering, blurs the genres of scholarship and fiction to demonstrate the argument that fiction can stand as a form of scholarly writing.     

MPS/CAS Partner Group on Colloid and Interface Science

The Partner Group on Colloid and Interface Science is based on the International Joint Laboratory, established in the former Beijing Institute of Photographic Chemistry,Chinese Academy of Sciences (CAS), and was incorporated into the Center for Molecular Science of the Institute of Chemistry, CAS in 1999.