The Department of Physiology, GMC Thiruvananthapuram is dedicated to teaching, research and clinical services and is largely successful in its endeavour for excellence in the field. The Department offers a range of clinical laboratory services to support patient care, operating through its Clinical Physiology Unit, which is a unique facility offering specialized services. Clinical Physiology Unit stands out for its Nerve Conduction Studies (NCS), Pulmonary Function Tests (PFTs). Since its inception, the department has successfully conducted over 5,000 Pulmonary Function Tests and over 200 Nerve Conduction Studies. Additionally, The Department offers Heart Rate Variability (HRV) tests in the Autonomic Function Test Lab, located within the Multi-Disciplinary Research Laboratory. The Clinical Physiology Unit provides electrodiagnostic studies which includes Nerve Conduction Studies, Pulmonary Function Tests, Autonomic Function Tests, Electroencepholograph, Electromyograph, Visual Evoked Potential, Electroretinograph, BERA. These help in the diagnosis and planning treatment of diseases affecting lungs, heart, nervous system, muscular system, vision and audition. Numbers of nerve conduction studies done through the electrophysiology lab include 8 studies in 2023, 51in 2024 and 29 studies in 2025.