Gyan Mudra / Chin Mudra variation - gesture of knowledge Gyan Mudra / Chin Mudra is a well known mudra in Hatha Yoga and across spiritual traditions. The mudra is formed by joining tips of index finger and thumb. Chin Mudra is a remedy for mental disorders, insomnia, high blood pressure and depression. Chin Mudra enhances memory and improves concentration. Chin Mudra helps in opening up of psychic centers and stimulates pineal gland.