The mind is a complex machine which we have yet to fully discover. The average human brain weighs about three pounds and includes the immense cerebrum, which is the largest portion. The cerebrum is responsible for control of thoughts and voluntary movement. Then the brain stem is responsible for involuntary functions like heart rate and breathing. The brain represents only three percent of the body's weight yet it uses 20 percent of the body's energy (Stevenson, classroom lecture, 2016). In a lecture on February 15, 2016, to a psych 201 class, professor Stevenson (2016) said not to believe the myth that we only use ten percent of our brain because we in fact use are entire brain. The durability myth comes from people's ideas about their own
