Rudraksha is formed by the association of two words, 'RUDRA' and 'AKSHA'. Rudra is the name of Lord Shiva. Aksha means 'tear'. It is said that the plant of Rudraksha is originated from the tear drops of Lord Shiva.
Rudraksha beads have certain Electromagnetic and Inductive properties and when worn over the heart they send out corresponding signals differing for different mukhis to the brain, activating or controlling certain brain chemicals and neurotransmitters thereby inducing states of mind as described in ancient scriptures.