http://suzannemorganyoga.com/hasta-mudras-for-health-healing/
A hasta mudra is a gesture or positioning of the hands to channel and direct energy in the body. Mudras come from the over three thousand year old tradition of yoga originating in India. Hasta means “hand” in Sanskrit and mudra comes from the Sanskrit word “mud”, meaning to delight. A mudra is a “seal” as in sealing your connection with the Divine and sealing energy in the body.
http://theloak.com/recommend/loaksatori.html
The reality is that it's not natural to run our brain at this extreme level of stress. Left unattended, mental pressure builds up and leads to anxiety, frustration, mood swings, depression and even physical symptoms such as high-blood pressure, hyper-tension and a host of other disorders!