Kaya mudras combine physical postures with breathing and concentration. It also deals with abstract yogic philosophy, mudras, tantric practices, and meditation. A Buddha image can have one of several common mudras, combined with different asanas. He practiced and became proficient in martial arts, Hatha Yoga, Shatkarma, Mudras and Sanskrit. Hindu and Buddhist iconography share some mudras. In some iconography, Parvati's hands may symbolically express many mudras (symbolic hand gestures). Other times he is holding various symbolic objects, or making symbolic mudras (gestures). Hasta mudras may be conducive for meditation, and help in internalization. The arms of Shiva express "mudras" (symbolic hand gestures), that are found in Bharatanatyam. These mudras are obvious yin and yang counterparts. The gestures used in Bharatanatyam are called "Hasta" (or "mudras"). Elsewhere, the Buddha is shown in different mudras. This is a list of Yoga mudras. Some Asian martial arts forms contain positions (Japanese&colon; "in") identical to these mudras. While some mudras involve the entire body, most are performed with the hands and fingers.