Emotion Effected to Blood Pressure and Volume

There are six responses that scientist commonly look at to study emotions. These are heart rate, blood pressure, blood volume, electrodermal responses, muscle potential, and brain wave patterns, or electroencephalograms (EEGs). All are controlled by the nerveous system.

Blood Pressure
This term refers to the force exerted by the heart to push blood out of arteries. A healthy adult blood pressure might be 120/80, for example. This would mean that when the heart contracts to push blood out, it exerts enough pressure to push mercury up to 120 mm (milimeters) in a measuring device (known as a sphygmomanometer). When the heart relaxes after the contraction, the pressure pushes the mercury up only 80 mm. They are great changes in blood pressure during highly charges emotional states.

Blood Volume
As we have just seen, the blood vessels can constrict and dilate (expand), which alters the rate of blood flow through them. When we grow pale with fear, the flow of blood to our faces has been restricted (vasoconstriction). In a person whose face is red with embarrassment, in contrast, the blood vessels are dilating, increasing the flow of blood to the face (vasodilation).