Windows into spatial cognition: Mechanisms by which gesture-based instruction improve anatomy learning.

Abstract

The ability to create efficient "mental models" or representations of anatomical structures is crucial for achieving competence in most areas of anatomy. Gesture-based teaching has been recognized to lighten cognitive loads and allow superior mental model creation compared to non-gestural teaching practices. This commentary explores the cognitive basis and possible mechanisms behind this advantage such as (1) reducing visual working memory load, (2) allowing parallel and sequential development of internal representations, and (3) facilitating preferential feature extraction and improved organization of spatial information. We also highlight how information transfer limitations of the gestural medium, interestingly, unveil features and organizational motifs preserved in the "expert's" mental schemas concerning particular anatomical structures. The universal and innate use of gestures in communication, their visual nature, and the ability to break down complex spatial information through sequential steps, all add to the immense potential of this subtle yet powerful tool of hand gestures. As pedagogical practices in the anatomical sciences continue to evolve largely towards technology-enhanced teaching utilizing perceptually richer media, the unique advantages of gesture-based teaching need to be reemphasized.