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- Visualizing low back pain: analysis of facial expressions for objective measurement through image processingPublication . Parolini, Franciele; Becker, Klaus; Goethel, Márcio; Pires, Ricardo; Dereste, Sara; Ervilha, Ulysses; Vilas-Boas, João Paulo; Santos, Rubim; Rubim Silva Santos, Manuel; Carvalho Santos Parolini, FrancieleDetailed coding of facial activity provides a mechanism for understanding the biological, behavioral, cognitive and social processes of pain that self-report measures do not address[1]. Facial activity appears to be the most consistent expression of pain, mediated by specific neurological circuits[2]. Studies have shown that facial expressions of pain are consistent and universal across different cultures, reflecting automatic responses to nociceptive stimuli[3, 4]. Thus, the proposed objective was to develop software to objectively measure experimentally induced acute low back pain during a submaximal strength test, using facial activity coding to capture biological and behavioral processes that complement traditional self-reporting methods.