To truly understand what Yoga Nidra is, you need to have a deeper understanding of the Koshas – the five layers of self. These layers are deeply interconnected, and if there is an issue with one Kosha, it affects all the others.
Physical body (Annamaya Kosha) – This is the outermost layer of your self, made up of your physical bones, muscles, organs, and skin.
Energetic body (Pranamaya Kosha) – This layer is composed of your body's life-force energy, sometimes referred to as “prana” or “chi.” The Pranamaya Kosha is the animating force behind your heartbeat, your breath, and your energy.
Mental/emotional body (Manomaya Kosha) – This third layer deals with your emotions, senses, and your nervous system. People who struggle with anxiety often have an overactive Manomaya Kosha, which yogic practice can help soothe.
Wisdom body (Vijnanamaya Kosha) – This layer is your inner knowing, the higher intelligence you carry inside of you. It shows up when your intuition gives you a gut feeling, and helps you understand who you are and how you relate to the world.
Bliss body (Anandamaya Kosha) – This is the deepest layer at the core of your being. It is a state where you experience pure joy, peace, and freedom. When in Anandamaya Kosha, your consciousness expands beyond your body, and time ceases to exist or matter.
Yoga Nidra helps you to draw attention to each of your Koshas, to peel them away until you reach your true essence – the blissful body. This practice can help you to process your emotions and achieve deep relaxation and peace.