Effect of binocular disparity on learning anatomy with stereoscopic augmented reality visualization: A double center randomized controlled trial

3D visualization technology for Learning human anatomy among medical students and residents: a meta- and regression analysis

BACKGROUND

3D visualization technology applies computers and other devices to create a realistic virtual world for individuals with various sensory experiences such as 3D vision, touch, and smell to gain a more effective understanding of the relationships between real spatial structures and organizations. The purpose of this study was to comprehensively evaluate the effectiveness of 3D visualization technology in human anatomy teaching/training and explore the potential factors that affect the training effects to better guide the teaching of classroom/laboratory anatomy.

METHODS

We conducted a meta-analysis of randomized controlled studies on teaching human anatomy using 3D visualization technology. We extensively searched three authoritative databases, PubMed, Web of Science, and Embase; the main outcomes were the participants' test scores and satisfaction, while the secondary outcomes were time consumption and enjoyment. Heterogeneity by I² was statistically determined because I²> 50%; therefore, a random-effects model was employed, using data processing software such as RevMan, Stata, and VOSviewer to process data, apply standardized mean difference and 95% confidence interval, and subgroup analysis to evaluate test results, and then conduct research through sensitivity analysis and meta-regression analysis.

RESULTS

Thirty-nine randomized controlled trials (2,959 participants) were screened and included in this study. The system analysis of the main results showed that compared with other methods, including data from all regions 3D visualization technology moderately improved test scores as well as satisfaction and enjoyment; however, the time that students took to complete the test was not significantly reduced. Meta-regression analysis also showed that regional factorsaffected test scores, whereas other factors had no significant impact. When the literature from China was excluded, the satisfaction and happiness of the 3D virtual-reality group were statistically significant compared to those of the traditional group; however, the test results and time consumption were not statistically significant.

CONCLUSION

3D visualization technology is an effective way to improve learners' satisfaction with and enjoyment of human anatomical learning, but it cannot reduce the time required for testers to complete the test. 3D visualization technology may struggle to improve the testers' scores. The literature test results from China are more prone to positive results and affected by regional bias.

Immersive virtual reality and augmented reality in anatomy education: A systematic review and meta-analysis

The purpose of this review was to (1) analyze the effectiveness of immersive virtual reality (iVR) and augmented reality (AR) as teaching/learning resources (collectively called XR-technologies) for gaining anatomy knowledge compared to traditional approaches and (2) gauge students' perceptions of the usefulness of these technologies as learning tools. This meta-analysis, previously registered in PROSPERO (CRD42023423017), followed PRISMA guidelines. A systematic bibliographical search, without time parameters, was conducted through four databases until June 2023. A meta-analytic approach investigated knowledge gains and XR's usefulness for learning. Pooled effect sizes were estimated using Cohen's standardized mean difference (SMD) and 95% confidence intervals (95% CI). A single-group proportional meta-analysis was conducted to quantify the percentage of students who considered XR devices useful for their learning. Twenty-seven experimental studies, reporting data from 2199 health sciences students, were included for analysis. XR-technologies yielded higher knowledge gains than traditional approaches (SMD = 0.40; 95% CI = 0.22 to 0.60), especially when used as supplemental/complementary learning resources (SMD = 0.52; 95% CI = 0.40 to 0.63). Specifically, knowledge performance using XR devices outperformed textbooks and atlases (SMD = 0.32; 95% CI = 0.10 to 0.54) and didactic lectures (SMD = 1.00; 95% CI = 0.57 to 1.42), especially among undergraduate students (SMD = 0.41; 95% CI = 0.20 to 0.62). XR devices were perceived to be more useful for learning than traditional approaches (SMD = 0.54; 95% CI = 0.04 to 1), and 80% of all students who used XR devices reported these devices as useful for learning anatomy. Learners using XR technologies demonstrated increased anatomy knowledge gains and considered these technologies useful for learning anatomy.

Objects drawn from haptic perception and vision-based spatial abilities

Haptic perception is used in the anatomy laboratory with the handling of three-dimensional (3D) prosections, dissections, and synthetic models of anatomical structures. Vision-based spatial ability has been found to correlate with performance on tests of 3D anatomy knowledge in previous studies. The objective was to explore whether haptic-based spatial ability was correlated with vision-based spatial ability. Vision-based spatial ability was measured in a study group of 49 medical graduates with three separate tests: a redrawn Vandenberg and Kuse Mental Rotations Tests in two (MRT A) and three (MRT C) dimensions and a Surface Development Test (SDT). Haptic-based spatial ability was measured using 18 different objects constructed from 10 cubes glued together. Participants were asked to draw these objects from blind haptic perception, and drawings were scored by two independent judges. The maximum score was 24 for each of MRT A and MRT C, 60 for SDT, and 18 for the drawings. The drawing score based on haptic perception [median = 17 (lower quartile = 16, upper quartile = 18)] correlated with MRT A [14 (9, 17)], MRT C [9 (7, 12)] and SDT [44 (36, 52)] scores with a Spearman's rank correlation coefficient of 0.395 (p = 0.0049), 0.507 (p = 0.0002) and 0.606 (p < 0.0001), respectively. Spatial abilities assessed by vision-based tests were correlated with a drawing score based on haptic perception of objects. Future research should investigate the contribution of haptic-based and vision-based spatial abilities on learning 3D anatomy from physical models.

Testing anatomy: Dissecting spatial and non-spatial knowledge in multiple-choice question assessment

Limited research has been conducted on the spatial ability of veterinary students and how this is evaluated within anatomy assessments. This study describes the creation and evaluation of a split design multiple-choice question (MCQ) assessment (totaling 30 questions divided into 15 non-spatial MCQs and 15 spatial MCQs). Two cohorts were tested, one cohort received a 2D teaching method in the academic year 2014/15 (male = 15/108, female 93/108), and the second a 3D teaching method in the academic year 2015/16 (male 14/98, female 84/98). The evaluation of the MCQ demonstrated strong reliability (KR-20 = 0.71 2D and 0.63 3D) meaning the MCQ consistently tests the same construct. Factor analysis of the MCQ provides evidence of validity of the split design of the assessment (RR = 1.11, p = 0.013). Neither cohort outperformed on the non-spatial questions (p > 0.05), however, the 3D cohort performed statistically significantly higher on the spatial questions (p = 0.013). The results of this research support the design of a new anatomy assessment aimed at testing both anatomy knowledge and the problem-solving aspects of anatomical spatial ability. Furthermore, a 3D teaching method was shown to increase students' performance on anatomy questions testing spatial ability.

The Application of 3D Anatomy for Teaching Veterinary Clinical Neurology

Neuroanatomy is always a challenging topic for veterinary students. It is widely accepted that understanding the anatomy of the central nervous system (CNS) is essential to explain many of the pathological processes that affect the brain. Although its study has varied over time to achieve this goal, in human and veterinary medicine it is difficult to find a teaching method that associates normal anatomy with pathological alterations of the brain. For the first time, we have created an educational tool that combines neuroanatomy and neuropathology, using different magnetic resonance (MR) images as a basis and EspINA software as analyzer, to obtain segmented structures and 3D reconstructions of the dog brain. We demonstrate that this combination is an optimal tool to help anatomists to understand the encephalon, and additionally to help clinicians to recognize illness including a multitude of neurological problems. In addition, we have tried to see whether photogrammetry, which is a common technique in other sciences, for example geology, could be useful to teach veterinary neuroanatomy. Although we still need further investigations, we have been able to generate 3D reconstructions of the whole brain, with very promising results to date.

Predictive factors of academic success in neuromusculoskeletal anatomy among doctor of physical therapy students

Predictors of academic success in anatomy have been studied, but not in Doctor of Physical Therapy (DPT) students. The objectives of this study were to (1) explore predictors of academic success in a DPT anatomy course, (2) evaluate sex-based differences in the predictors of academic success and their influence on anatomy course grade, and (3) investigate the influence of the DPT anatomy course on visual-spatial ability. Forty-nine DPT students completed a demographic questionnaire, Learning and Study Strategies Inventory (LASSI), and Mental Rotations Test (MRT) before the ten-week anatomy course (MRT-1) and repeated the MRT at the end of the course (MRT-2). Anatomy course grade was determined based on quizzes and written and practical examinations. Multiple regression analysis showed significant associations between the predictor variables age (p = 0.010) and the LASSI anxiety subscale (p = 0.017), which measures anxiety coping, with the anatomy course grade. On the MRT-1, male DPT students attempted and correctly answered more questions than females (both, p < 0.0001). Female students had higher LASSI self-regulation and use of academic resources subscale scores (both, p < 0.05). In the 44 DPT students that completed the MRT-2, the number of correct and attempted responses increased following the anatomy course (p < 0.0001). Age and anxiety coping, but not sex, are predictors of anatomy course grades in DPT students. Mental rotations test scores improved following the anatomy course. The LASSI should be used in other cohorts to identify students with low anxiety subscale scores in order to provide targeted support.