The Primary Motor Cortex. Every voluntary movement you make is controlled through the primary motor cortex, or PMC, which is located in the back of the frontal lobe, just about at the top of your head.Signals in your brain are sent to the muscles, telling them to make a movement.he Primary Motor Cortex. Every voluntary movement you make is controlled through the primary motor cortex, or PMC, which is located in the back of the frontal lobe, just about at the top of your head.
What is a unit rate? A unit rate is a rate expressed in a quantity of one unit. A car traveling at a rate of 60 miles per hour, for example, is an expression of a unit rate. It describes the car's traveling rate over 1 hour of time.
In mathematics, a rate is the ratio between two related quantities. Often it is a rate of change. If the unit or quantity in respect of which something is changing is not specified, usually the rate is per unit time.However, a rate of change can be specified per unit time, or per unit of length or mass or another quantity.The most common type of rate is per unit time, such as speed, heart rate and flux. Ratios that have a non-time denominator include exchange rates, literacy rates and electric flux.n describing the units of a rate, the word per is used to separate the units of the two measurements used to calculate the rate (for example a heart rate is expressed beats per minute).