Medicine

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Morphological variations of lumbrical muscles in Sri Lankan cadavers
(IMED Research Publications, 2022) Ranaweera, L.; Wijesooriya, P.; Vithanage, S.; Cabral, E.
Introduction: Lumbricals are the small, worm-like, intrinsic muscles responsible for performing the precision pinch movements of the hand. These are quite unique in their position owing to movable proximal and distal tendon attachments. Purpose of the study: The aim of the study was to identify anomalies of lumbrical muscle present in the Sri Lankan people. Materials and Methods: A sample of 39 formalin preserved cadaveric human hands were subjected to the gross morphological study. Results: It was encountered that 59% of the lumbricals were normal in proximal and distal attachments whereas the rest of the lumbicals (41%) indicated the morphological variations. Among the hands, unipennate third lumbrical was seen in 7.7% (Left-15.7%: Right 0%) and unipennate fourth lumbrical was seen in 5.1% (Left-10.5%: Right 0%). The bipennate second lumbrical was seen in 5.1% (Left 5.3%: Right 5.1%). The 10.3% of split insertion was encountered in third lumbricals (Left 10.5%: Right 10%) as well as in fourth lumbricals (Left 5.3%: Right 15%). The third lumbrical insertion on the medial side of the middle finger was seen in 2.5% (Left 5.3%: Right 0%). Conclusion: The left hand is having more lumbrical variations than the right hand of the subjected human cadavers. The most common variation site is the insertion site. The variants are numerous in third and fourth lumbricals. The most common type of variation is the split insertion.
Virtual anatomy learning through the eye of ayurveda medical students in Sri Lanka during COVID 19 pandemic.
(WHO Office in Azerbaijan., 2022) Ranaweera, L.; Samaranayake, G.V.P.; Cabral, E.
Anatomy is the foundation stone of medical education. The COVID 19 pandemic imposed unexpected disruption to Anatomy education with most universities moving regular onsite classes to the online session. The purpose of this study was to identify the perceptions of Ayurveda medical students regarding virtual or online Anatomy learning. The study was conducted on 69 second-year Ayurveda medical students using a self-administrated questionnaire. The majority of the students (92.8%) did not have prior experience in online learning (OL) before the COVID 19 pandemic. Regarding the learning activities preferred by students prior to the COVID 19, 73.9% of students preferred the live lectures from the academic staff. It was evident that 92.8% of students believed that zoom cloud meeting is the most effective method of Anatomy in the OL platform. In order to improve their Anatomy dissection knowledge, 50.7% of students were suggested to show live Gross Anatomy dissection. The OL is more successful than onsite learning for the theory of Anatomy. Access to online materials (86.9%), learning from their own places (92.7%), the ability to stay at home (95.6%), interactivity of the class (56.5%), and the ability to record a meeting (88.4%) are the key advantages of OL. Reduced Interaction with the teacher (78.2%), technical issues (92.7%), lack of interactions with their colleagues (82.6%), poor learning conditions at home (71%), and social isolation (81.1%) are the main disadvantages that they must face in their online learning process. In the era of smartphones and the internet, it was indicated that the Ayurveda medical students prefer to be engaged in the hybrid system which includes online Anatomy lectures with onsite Anatomy practicals.
Estimation of sex from the osteometric measurements of the femur in a contemporary Sri Lankan population
(Chilean Society of Anatomy, Argentine Association of Anatomy and Panamerican Association of Anatomy., 2022) Ranaweera, L.; Cabral, E.; Dissanayake, D.M.P.V.; Lakshan, W.S.V.
SUMMARY: Sex estimation from human skeletal remains is of vital importance in the buildup of a biological profile of an individual in medico-legal and bioarchaeological studies. The present study is focused on the estimation of sex from osteometric measurements of the complete femur and its fragmentary parts, and the development of a web based application related to this. Fifteen osteometric measurements were taken from 78 dry cadaveric femurs from the Faculty of Medicine, University of Kelaniya. Using R software, linear discriminant analysis and logistic regression methods were applied to build classification models with the help of the application of a stepwise procedure, to identify the best combination of measurements to estimate the sex of the femur. A cross-validation method was applied to estimate the predictive accuracy of each model. Since the linear discriminant analysis model gave more predictive accuracy than the regression model, we suggest using linear discriminant analysis to estimate the sex using osteometric measurements of the femur. From the whole femur measurements, a formula to determine sex was developed with highest total accuracy of 83 % using four parameters; epicondylar breadth, anteroposterior mid-shaft diameter, bi-trochanter length, and maximum shaft diameter. Similarly, measurements of transverse head diameter and bi-trochanter length with a total accuracy of 76 % for the proximal part of the femur, measurements of anteroposterior mid-shaft diameter with a total accuracy of 77 % for the mid-shaft, and measurements of epicondylar breadth and maximum length of the lateral condyle with a total accuracy of 70 % for the distal part of the femur were identified as significant discriminants to determine sex, and formulae were written accordingly. Average accuracy ranged from 83 % to 70 %, with male accuracy slightly higher than that of females. A web application to estimate the sex of femur using these formulae was developed and this will be of great importance for forensic medicine and bio-archaeological research in Sri Lanka

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