Chakras are actually transformers of subtle energy. They take the universal life energy that is always around us and transform it into the various frequencies our subtle energy system needs to keep us healthy. The lowest or root chakra brings in the lower frequencies that are needed for physical survival and the highest or crown chakra brings in the spiritual levels of energy. Each chakra corresponds with a layer of the aura. Negative feelings or thoughts can become lodged in the chakras reducing the amount of subtle energy they are able to provide and adversely affecting ones health.
The Crown Chakra (Sahasrara), which means 1000 petalled lotus, is generally considered to be the chakra of pure consciousness, within which there is neither object nor subject. Its role may be envisioned somewhat similarly to that of the pituitary gland, which secretes hormones to communicate to the rest of the endocrine system and also connects to the central nervous system via the hypothalamus. The thalamus is thought to have a key role in the physical basis of consciousness. Sahasrara's inner aspect deals with the release of karma, physical action with meditation, mental action with universal consciousness and unity, and emotional action with "beingness".
The Brow Chakra (Ajna) is symbolised by a lotus with two petals, and corresponds to the colors violet, indigo or deep blue. Ajna is known as the third eye chakra and is linked to the pineal gland which may inform a model of its envisioning. The pineal gland is a light sensitive gland that produces the hormone melatonin which regulates sleep and waking up. Ajna's key issues involve balancing the higher & lower selves and trusting inner guidance. Ajna's inner aspect relates to the access of intuition. Mentally, Ajna deals with visual consciousness. Emotionally, Ajna deals with clarity on an intuitive level.
The Throat Chakra (Vishuddha) is depicted as a silver crescent within a white circle, with 16 light or pale blue, or turquoise petals. Vishuddha may be understood as relating to communication and growth through expression. This chakra is paralleled to the thyroid, a gland that is also in the throat and which produces thyroid hormone, responsible for growth and maturation. Physically, Vishuddha governs communication, emotionally it governs independence, mentally it governs fluent thought, and spiritually, it governs a sense of security.
The Heart Chakra (Anahata) is symbolised by a circular flower with twelve green petals. Within it is a yantra of two intersecting triangles, forming a hexagram, symbolising a union of the male and female. Anahata is related to the thymus,located in the chest. The thymus is an element of the immune system as well as being part of the endocrine system. It is the site of maturation of the T cells responsible for fending off disease and may be adversely affected by stress. Anahata is related to the colours green or pink. Key issues involving Anahata involve complex emotions, compassion, tenderness, unconditional love, equilibrium, rejection and well-being. Physically Anahata governs circulation, emotionally it governs unconditional love for the self and others, mentally it governs passion, and spiritually it governs devotion.
The Solar Plexus Chakra (Manipura or manipuraka) is symbolised by a downward pointing triangle with ten petals. Manipura is related to the metabolic and digestive systems. Manipura is believed to correspond to Islets of Langerhans, which are groups of cells in the pancreas, as well as the outer adrenal glands and the adrenal cortex. These play a valuable role in digestion, the conversion of food matter into energy for the body. The colour that corresponds to Manipura is yellow. Key issues governed by Manipura are issues of personal power, fear, anxiety, opinion-formation, introversion, and transition from simple or base emotions to complex. Physically, Manipura governs digestion, mentally it governs personal power, emotionally it governs expansiveness, and spiritually, all matters of growth
The Sacral Chakra (Swadhisthana, Svadisthana or adhishthana) is symbolized by a white lotus within which is a crescent moon, with six vermillion, or orange petals. The Sacral Chakra is located in the sacrum and is considered to correspond to the testes or the ovaries that produce the various sex hormones involved in the reproductive cycle. Swadisthana is also considered to be related to, more generally, the genitourinary system and the adrenals. The key issues involving Swadisthana are relationships, violence, addictions, basic emotional needs, and pleasure. Physically, Swadisthana governs reproduction, mentally it governs creativity, emotionally it governs joy, and spiritually it governs enthusiasm.
The Root Chakra(Muladhara) is represented as a yellow square, with 4 red petals. This chakra is where the 3 channels are merged, then separate and begin their upward movement. Muladhara is related to instinct, security, survival and also to basic human potentiality. This center is located in the perineum, which is the region between the genital and the anus. It is said to relate to the gonads and the adrenal medulla, responsible for the fight-or-flight response when survival is under threat. Muladhara is symbolized by a lotus with four petals and the colour red. Key issues involve sexuality, lust and obsession. Physically, Muladhara governs sexuality, mentally it governs stability, emotionally it governs sensuality, and spiritually it governs a sense of security.