السبت، 7 يونيو 2008

Ayurveda



Ayurveda (Devanagari: आयुर्वेद) or Ayurvedic medicine is an ancient system of health care that is native to the Indian subcontinent. Even today it is very common in India, Nepal, and Sri Lanka and is used by millions of people. Ayurveda is also gaining popularity in the west. The word "Ayurveda" is a tatpurusha compound of the word āyus meaning "life," "life principle," or "long life" and the word veda, which refers to a system of "knowledge." Thus "Ayurveda" roughly translates as the "knowledge of life," "knowledge of a long life" or even "science of life." According to Charaka Samhita, "life" itself is defined as the "combination of the body, sense organs, mind and soul, the factor responsible for preventing decay and death, which sustains the body over time, and guides the processes of rebirth." According to this perspective, Ayurveda is concerned with measures to protect "ayus", which includes healthy living along with therapeutic measures that relate to physical, mental, social and spiritual harmony. Ayurveda is also one among the few traditional systems of medicine to contain a sophisticated system of surgery (which is referred to as "salya-chikitsa").


Gurukula system

In the earlier days of its conception, the system of Ayurvedic medicine was orally transferred via the Gurukul system until a written script came into existence.
In this system, the Guru gave a solemn address where he directed the students to a life of chastity, honesty, and vegetarianism. The student was to strive with all his being to heal the sick. He was not to betray patients for his own advantage. He was required to dress modestly and avoid alcohol or drugs. He was to be collected and self-controlled, measured in speech at all times. He was to constantly improve his knowledge and technical skill. At the patient's home, he was to be courteous and modest, directing all attention to the patient's welfare. He was not to divulge any knowledge about the patient and his family. If the patient was incurable, he was to keep this to himself if it was likely to harm the patient or others.
The normal length of the student's training appears to have been seven years. Before graduation, the student was to pass a test. But the physician was to continue to learn through texts, direct observation (pratyaksha), and through inference (anumāna). In addition, the vaidyas attended meetings where knowledge was exchanged. The practitioners also gained knowledge of unusual remedies from laypeople who were outside the huffsteter community such as hillsmen, herdsmen, and forest-dwellers.

Sapta dhatus

Sapta means seven and the word Dhatu refers to various types of tissues the human body is made of. The word Dhatu in Sanskrit means “that which forms the body”. The root Dha means support and the Dhatus sustain the body.
The seven dhatus mentioned are Rasa, Rakta, Maamsa Medas, Asthi, Majja and Shukra.
Rasa: The food we consume is digested in the stomach and intestine and forms a semi-fluid. This is called Rasa dhatu. In modern science it is called chyle. This is absorbed into the blood stream and becomes part of the plasma the fluid which can be seen after the cells in the blood settle down at the bottom if blood mixed with an anticoagulant (a substance which prevents blood from clotting) is kept in a tube.
Rakta: Rakta means blood. Blood is responsible for carrying oxygen and nutrients to all the cells of the body.
Mamsa: This refers to muscle tissue. There are three types of muscles in the human body. The skeletal muscles are responsible for movements of joints and are under voluntary control. Smooth muscles are present in internal organs and are not under voluntary control. For example the intestines contain smooth muscles which propel food forward. Cardiac muscle is present only in the heart and is a specialized tissue responsible for pumping of blood.
Medas: This is the adipose tissue which consists mainly of fat. It is responsible for lubrication.
Ashthi: This consists of bones and cartilages. Bones give strength to the body.
Majja: This refers to the bone marrow. It is a spongy substance inside the cavity of bones.
Shukra: The shukra dhatu is represented by the semen in the male and the ovum in the female. It is responsible for reproduction. But a part of this dhatu transforms itself into ojas.
The word ojas is a Sanskrit word which literally means immunity, energy, vigor etc. It is somewhat an abstract entity and its equivalent in modern medicine is not known. It is the interface between the spiritual and the material dimensions of a human being.
We all know that some people are full of energy, rarely fall sick and have a bright look on their face. On the other hand some people always feel tired, fall sick frequently and look dull. It may not be possible to identify any difference between the two by conducting detailed physiological and biochemical tests.
According to ayurveda the difference is in the level of ojas. Ojas integrates body, mind and spirit together resulting in a unique individual. Ojas is responsible for bala (strength) and vyadhikshamatva (resistance to diseases).
Scriptures describe two types of ojas-Para ojas and Apara ojas. Para ojas is said to be located in the heart and its loss leads to death. Apara ojas is distributed throughout the body.

Tridosha system

The central concept of Ayurvedic medicine is the theory that health exists when there is a balance between three fundamental bodily humours or doshas called Vata, Pitta and Kapha.
Vata is the dynamic "kinetic" principle necessary to mobilize anything from electron to a galaxy. Air is the representative in an abstract sense.
Pitta is the thermal, explosive force behind the ability to transform everything. Sun is the representative.
Kapha is the cohesion that holds everything together with its electro magnetic and gravitational forces.
All Ayurvedic physicians believe that these ancient ideas, based in the knowledge discovered by the Rishis and Munis, exist in harmony with physical reality. These Ayurvedic concepts allow physicians to examine the homeostasis of the whole system. People may be of a predominant dosha or constitution, but all doshas have the basic elements within them.

Philosophy

The emergence of different schools of Sanskrit philosophy like Nyaya, Vaisheshika, Sankhya, Yoga, Vedanta and Mimamsa was another landmark in the history of Indian medicine. The principles expounded in these philosophies facilitated the development within Ayurveda of its theory of humoral pathology which propounds that the human body is composed of Tridoshas, the three humors – Vata, Pitta and Kapha. When these are in equilibrium they are called the Tridhatus. The body in which these three humors are in a state of equilibrium enjoys perfect health; their disequilibrium causes ill health.

[edit] Disease management
The principles of Ayurvedic pharmacology are fundamentally different from those of other systems of medicine, especially evidence-based medicine. Most Ayurvedic medicines are prepared from herbs.
Shamana and Shodhana are the two concepts of disease management in Ayurveda. Shamana means alleviation. Shamana methods mitigate the disease and its symptoms. Shodhana means elimination and Shodhana methods aim at the elimination of the basic cause of disease. There are 5 types of shodana which is well known as panchakarma. Panchakarmas are vamana, virechana, nasya, basti and raktha mokshana. In shamana usually medicines are given internally where as in shodana external treatments are given. Shodana karma have 2 poorvakarma for prepraring the patients body for treatment, ie. snehana and swedana.

Tastes and effects

Ayurveda holds that the tastes of foods or herbs have specific physiological effects. Those tastes that transform after digestion (Vipaka) are more powerful.
Sweet (Madhura) - Sweet foods nourish, cool, moisten, oil, and increase weight
Sour (Amla) - Sour foods warm, oil, and increase weight
Salty (Lavana) - Salty foods warm, dissolve, stimulate, soften, oil, and increase weight
Bitter (Katu) - Bitter foods cool, dry, purify and decrease weight
Pungent (Tikta) - Pungent foods warm, dry, stimulate, and decrease weight
Astringent (Kashaya) - Astringent foods cool, dry, reduce stickiness.
Hot (Jhala)

Medications
See also: List of herbs and minerals in Ayurveda

Ayurveda operates on the precept that various materials of vegetable, animal, and mineral origin have some medicinal value. The medicinal properties of these materials have been documented by the practitioners and have been used for centuries to cure illness and/or help maintain good health. Ayurvedic medicaments are made from herbs or mixtures of herbs, either alone or in combination with minerals, metals and other ingredients of animal origin. The metals, animals and minerals are purified by individual processes before being used for medicinal purposes.
Writers and compilers of Ayurvedic literature such as Charaka, Sushruta, Vagabhatta, Bhav Mishra, Shaligram and others have written about the qualities, characteristics and medicinal uses of the herbs, mineral, metals, chemicals, animal parts, cooked food articles, natural foods, fruits etc. Among them, the Bhav Prakash Nighantu, written by Bhav Mishra, is known for its detail .The composition of the Nighantu part (Ayurvedic Materia Medica) of the Bhav Prakash is part of the classical book. The details of the medicinal herbs are given according to the nature, effects, and curative properties as observed by the Ayurvedic practitioners.
Ayurvedic literature has been written by several authors in languages such as Sanskrit, Hindi, Kannada, Tamil, Telugu and more recently, in English.The Shaligram Nighantu was written in Sanskrit. The Banaushadhi Chandrodaya was written in Hindi.The Indian Materia Medica was written in English.

Panchakarma and Ayurvedic massage
See also: Panchakarma

Panchakarma (the five therapeutic modalities) is a collection of purification techniques that Ayurveda prescribes for specific conditions and diseases and for periodic cleansing. A course of Pancharkarma typically includes a nutritional adjustments, herbs, pre or co panchakarma therapies (such as oil massages, hot baths, steam or sauna, shirodhara, dehadhara, hot rice massage etc) and one or some of the main therapies (such as vamana - removal of the kapha toxins, virechana - removal of the pitta toxins, vasti - removal of the vata toxins, raktamoksha - removal of the toxins trapped in blood stream, and nasya - removal of toxins trapped in sinuses and cranial area.
Abhyanga - oil application and mardana - massage form the background of a course of therapy. This combination helps heal pain, circulatory problems, residue of stress, disturbed sleep, stiffness and tiredness.[citation needed] Massage therapy can soothe pain, relax stiff muscles, and reduce the swelling that accompanies arthritis.[citation needed] Advocates claim that, with Ayurvedic massage, deep-seated toxins in the joints and tissues are loosened and released into the system for elimination through natural toxin-release processes There are several different types of Ayurvedic treatments such as panchakarma, marma massage and abhyangam Ayurvedic massage is especially developed in Sri Lanka and the Indian state of Kerala.

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