Effect of SNB on the QoR in Patients Undergoing Supratentorial Tumor Resection

In the SNB group, bilateral scalp nerve blocks will performed using 20 mL of 0.75% ropivacaine after anesthesia induction. To cover the area of surgical incision and skull clamp, seven scalp nerves including the supratrochlear, supraorbital, zygomaticotemporal, auriculotemporal, lesser occipital and greater occipital nerves, are blocked bilaterally by injecting 1-2 ml of the solution using a 25-gauge needle.