Awakening energy: How Raja yoga’s ancient wisdom connects with modern science

Have you ever wondered if there’s a scientific explanation behind the powerful experiences described in yoga? Raja Yoga, one of the classical paths of yoga, offers a fascinating blend of ancient philosophy and insights that are surprisingly relevant to what we know about the human body and mind today. Swami Vivekananda, a pioneer in bringing yoga to the West, described Raja Yoga using terms that echo both spiritual tradition and modern anatomy. Let’s explore how these ideas relate to your yoga practice and what science has to say.

At the heart of Raja Yoga is the concept of prana, or life energy, which is said to rest dormant at the base of the spine as Kundalini. Through dedicated yogic practice, this energy awakens and travels upward through a series of centers, or chakras, ultimately reaching the brain for full mental and spiritual development. While these visualizations may sound mystical, they are not entirely divorced from what we know about the nervous system.

Swami Vivekananda described two main currents, Ida and Pingala, which flow along the spine in a figure-eight pattern, crossing at the base and returning to the brain. Although modern neuroscience hasn’t identified physical nerves that exactly match these currents, there is a structure called the reticular formation in the brainstem and spinal cord. This network helps regulate posture, wakefulness, emotions, and even hormone release - functions that are closely tied to the sense of balance and energy that many yogis feel during practice.

Another key channel in Raja Yoga is the Sushumna, which runs through the center of the spinal cord. Vivekananda suggested that in most people, this channel is closed at the base, but yogic practice can open it, allowing energy to move freely. In scientific terms, the central canal of the spinal cord does exist and carries cerebrospinal fluid, and the surrounding nerves may play a role in transmitting signals throughout the body. While Kundalini energy isn’t the same as nerve impulses or fluid, the parallels are intriguing and invite further exploration.

The chakras, or energy centers, are also mapped to real anatomical structures. For example, the Muladhara (root) chakra corresponds to the pelvic plexus, Manipura (solar plexus) to the celiac plexus, and Sahasrara (crown) to the pineal gland in the brain. Interestingly, the pineal gland, once thought to be unimportant, is now recognized as a major endocrine gland that helps regulate sleep and other vital functions. Philosophers like Descartes even called it the “seat of the soul,” echoing yogic beliefs about its spiritual significance.

A truly novel perspective is emerging from this synthesis of yogic wisdom and modern science. The idea that ancient yogic concepts - like chakras, energy channels (Ida, Pingala, Sushumna), and Kundalini - may have real, physical counterparts within the human nervous system, especially within the autonomic nervous system and certain brain structures, is gaining traction. The chakras described in yogic tradition can be mapped onto actual nerve plexuses in the body, such as the solar plexus, cardiac plexus, and pelvic plexus. Even more intriguing is the idea that the crown chakra (Sahasrara), traditionally seen as the seat of enlightenment, corresponds to the pineal gland in the brain - a structure now recognized by science as a major endocrine gland with regulatory functions, and historically considered by philosophers like Descartes as the “seat of the soul”.

Additionally, the yogic energy channels Ida and Pingala, while not directly observable as physical nerves, may relate to the reticular formation - a network in the brainstem and spinal cord that regulates vital functions like wakefulness, posture, and emotion. The Sushumna channel could correspond to the central canal of the spinal cord, surrounded by nerve fibers that transmit important signals throughout the body.

What makes this perspective so exciting is that it doesn’t just add scientific credibility to yogic practices - it opens up new possibilities for research and self-exploration. If the sensations and transformations experienced during yoga and meditation have a basis in our nervous system, then yoga is not just a spiritual or philosophical pursuit, but also a profound way to interact with and influence our own biology.

In essence, yoga emerges as a bridge between body and mind, ancient tradition and modern science. By practicing yoga, you might not only be awakening spiritual energy, but also engaging with the very networks that shape your physical and mental well-being. This evolving understanding could inspire further research, deeper practice, and a new appreciation for how yoga truly connects us - inside and out.

Tips for yoga practitioners:

Integrate breath with movement Sync mindful breathing (pranayama) with yoga postures to calm the nervous system, lower stress, and steady emotions. Match breath to movement for deeper focus.

Prioritize consistency over intensity Short, regular sessions beat occasional intense practice. Aim for 10–15 minutes daily to steadily support physical and mental health.

Cultivate body awareness Notice sensations and subtle energy shifts during practice to better read your body, enhance each posture’s benefits, and deepen nervous-system balance.

Inspired by the research of J.K. Sarkar, Ancient science of life, 1985

PMID: 22557511