Time-lapse dissection videos: traditional practice in a new, digital format

This research introduces an innovative series of time-lapse dissection videos that enable accelerated observation of the dissection process. Cadaveric dissection has consistently been described in the literature as a reliable method for enhancing student understanding and visualisation, however as a process it is expensive and extremely time-consuming, hence it is often inaccessible to learners. When active dissection is unavailable, prosections can be used to teach anatomy, however a considerable amount of spatial and structural information is lost during the dissection process. These time-lapse videos demonstrate dissection quickly and accurately and allow an irreversible process to be rewound and rewatched with flexibility. Results suggest that time-lapse offers a comprehensive and engaging view of the dissection process that students appreciate being able to observe within a concise timeframe. Written annotation, audio narration and colourful highlighting were essential inclusions following student feedback. These videos can provide instruction before dissection classes or can expose the dissection process to learners without access to cadaveric specimens. However, certain invaluable elements of practical dissection are rooted within constructivism and cannot be replicated by video. Time-lapse dissection videos should therefore be used to supplement and not replace active dissection.本研究推出了一套创新性的延时解剖视频序列，可实现解剖过程的加速观测。尸体解剖（cadaveric dissection）在既往学术文献中被一致认定为提升学生理解能力与空间可视化认知的可靠教学手段，但该流程成本高昂且耗时极长，因此学习者往往难以获取相关实践机会。在无法开展实体解剖教学的场景下，可采用预制解剖标本（prosections）进行解剖学授课，但此类方式会在解剖过程中丢失大量空间结构信息。上述延时解剖视频能够快速且精准地完整展示解剖流程，并可灵活回放、反复观看原本不可逆的解剖全过程。研究结果表明，延时视频可为解剖过程提供全面且极具吸引力的观测视角，学生们对能够在短时间内完成该流程的系统性观察表示高度认可。根据学生反馈，文字标注、音频旁白与彩色高亮标注均为该类视频不可或缺的组成部分。此类延时解剖视频既可用于解剖课程的课前预习教学，也可为无法接触尸体标本的学习者展示完整的解剖流程。然而，实体解剖中部分极具教学价值的核心元素根植于建构主义学习理念，无法通过视频形式进行复刻。因此，延时解剖视频仅可作为实体解剖教学的补充手段，而非替代方案。