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Brachial plexus (BP) birth injury has a reported incidence of 1 to 4 per 1000 live births. During complicated deliveries, neonatal, maternal, and other birth-related factors can cause over-stretching or avulsion of the neonatal brachial plexus leading to injury. Understanding biomechanical responses of the neonate brachial plexus when subjected to stretch can offer insight into the injury outcomes while guiding the development of preventative maneuvers that can help reduce the occurrence of neonatal brachial plexus injuries. This review article aims to offer a comprehensive overview of existing literature reporting biomechanical responses of the brachial plexus, in both adults and neonates, when subjected to stretch. Despite the discrepancies in the reported biomechanical properties of the brachial plexus, available studies confirm the loading rate and loading direction dependency of the brachial plexus tissue. Future studies, possibly in vivo, that utilize clinically relevant neonatal large animal models can provide translational failure values of the biomechanical parameters for the neonatal brachial plexus when subjected to stretch. [ABSTRACT FROM AUTHOR]

The present study was conducted to estimate prevalence and nature of various musculoskeletal injuries in populations of free-ranging rhesus macaques in Shivalik Hills of Himachal Pradesh in Northern India. Data were collected over a period of 2 years and analyzed in relation to sex, age-group and season. In total, 1522 (44.6%) cases of musculoskeletal injuries were recorded; of these, 645 (47.1%) were males and 877 (43%) were females. Data revealed that differences observed between sex, season and age were statistically significant. Musculoskeletal injuries were more common during winter season followed by monsoon and then summer (27.4%). Males (47.1%) were injured more frequently than females (43.1%), while adults (47.9%) were injured more frequently than juvenile (42.8%) and young ones (28.8%). Of all the musculoskeletal injuries, wounds (84.5%) were most common followed by fractures (7.2%), amputations (4.5%) and snares/pellets (3.9%). The result from present study indicated that musculoskeletal injuries were frequent in rhesus macaque population studied. Musculoskeletal injuries occurring throughout year likely reflect the multiple causes viz predation, disease, vehicle trauma and electrocution, which may act independently or jointly. Understanding the role primates play in local culture and religion, therefore, is essential for understanding the underlying basis of commensalisms and conflict. [ABSTRACT FROM AUTHOR]