What do you think, which has the bigger representation in your brain, your hand or your arm? Sensations and movements of your hand are controlled by more of your brain than sensations and movements of your arm (because your hand needs to perform more precise movements).
Practical application: When you relax in #Anandasana of #Yoga in Daily Life by shifting attention to different parts of your body, you need to stay longer at the parts that are represented by bigger areas of the brain and that will slow down the brain activity enabling you to experience the feeling of joy (‘Ananda’).