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BACKGROUND: The use of electronic resources in education, including i- applications used on portable handheld devices, is increasing. Apple® handheld devices are popular, with free applications the most prevalent download form. Many gross anatomy i- applications are available, however no information on the quality of free anatomy products is available. Rating such products could therefore guide product recommendations. AIM: To evaluate the quality and range of free iPod® applications that are applicable for tertiary level gross anatomy education. METHODS: A search of the iTunes® Application Store with keywords anatomy, free, medical, functional, clinical, gross, and human was performed, with inclusion based on free applications containing human gross anatomy usable for tertiary education purposes. Application specification was noted; each was trialled independently and rated for usability, specification, academic level, and quality (image and programme). RESULTS: Sixty-three applications were identified and eleven met inclusion criteria. Two provided gross anatomy of the entire body, nine examined specific regions or systems. Five were judged introductory in academic level, five intermediate, and one advanced. One application was rated low quality, and four excellent. None were considered difficult to use (six easy, five medium). Application size ranged between 1.2MB and 229MB (mean 27MB). CONCLUSIONS: There are few free i-applications for learning gross anatomy and most concentrate on individual body systems, with the academic level and usability of all products well rated. Results suggest some free I- applications could be suitable adjuncts for gross anatomy education at both an undergraduate and graduate level.
RESUMO
PURPOSE: The human ileocaecal junction (ICJ) is a major transition zone regulating intestinal transit. Historically, it has often been considered a valve rather than a sphincter. The microscopic anatomy of this junction was studied searching for evidence of an anatomical sphincter and neuromuscular specialisation. METHODS: Ileocaecal specimens were obtained from ten cadavers and five surgical donors (7 male, mean age 81 years, age range 68-94) and examined by histology and immunohistochemistry. Quantitative analyses of muscle thickness and submucosal vascularity were performed together with immunohistochemical studies of innervation and the distribution of interstitial cells of Cajal. RESULTS: The thickness of the muscular layer in both the ileum and the colon increased significantly over a distance of 1 cm leading up to the base of the ileal papilla where it reached a maximum (4.19 ± 2.0 mm) before gradually tapering towards the tip of the papilla. Submucosal vascularity in the ileal papilla was not increased compared to the adjacent ileum or caecum/colon. Neuronal density was less in the caecum and ileal papilla compared to the terminal ileum (P < 0.05). Interstitial cells of Cajal were identified within the myenteric plexus of the ICJ but their density was similar to the adjacent bowel. CONCLUSIONS: A localised muscle thickening at the base of the ileal papilla is consistent with an intrinsic anatomical sphincter. There was no evidence that the ICJ has increased submucosal vascularity or a greater density of innervation compared to the adjacent bowel. The term ileocaecal valve is misleading and should be replaced by ileocaecal junction.