Sensory Analysis and Cutaneous Mapping of Different Regional Anesthesia Techniques

This observational study is mapping exactly where different nerve block techniques numb the skin during laparoscopic gallbladder removal surgery. Researchers want to understand which areas of the abdomen are covered by each type of regional anesthesia so that pain management after surgery can be improved. **You may be eligible if:** - You are between 18 and 75 years old - You are scheduled for a planned (elective) laparoscopic cholecystectomy (gallbladder removal surgery) - You will receive a regional nerve block as part of your anesthesia plan - You are in generally good health (ASA physical status I–III) - You are able to provide written consent **You may NOT be eligible if:** - You refuse to participate - You did not receive a nerve block - You are classified as high anesthesia risk (ASA IV) - You have had previous abdominal surgery that may affect the surgical approach - You have cognitive difficulties or cannot cooperate with sensory testing - You have a psychiatric disorder or are taking antipsychotic medication for more than 4 weeks Talk to your doctor to see if this trial is right for you.