It seems that the most significant characteristic of hypnosis is selective concentration of attention: intensification of attention while narrowing its range. During the clinical hypnosis the patient is asked to focus his attention to object. At the same time the hypnotist is suggesting the feelings related with deep relaxation and sleep; body weight, tiredness, drowsiness, detachment from reality. Thanks to his imagination, the patient is slowly adopting these suggestions and act accordingly.
The hypnosis process is narrowing the patient’s attention to designated object, as well to voice of hypnotist. Patient's consciousness is detaching from everything else. The feeling of tiredness and drowsiness are putting to sleep the brain functions that are connected to bodily functions and sensations. The conscious functions dedicated to senses are blocked by suggestion to the state of isolation.
Finally, awaken is only the part of the consciousness that are dedicated to observing the object and the voice of hypnotist. The rest of mind and body is "sleeping". Reception of other sensations from the surrounding and the body is blocked. Of course, the body is still receiving the inputs from the senses, but those inputs are blocked by the hypnotic state of mind. Finally, even eyes are tired from focusing to the object. So the patient is closing his eyes. The contact with hypnotist is only thing that remains awaken. Even more than awaken, the connection to hypnotist is getting more and more awaken. As the result the patient is becoming more responsive to the voice and messages of hypnotist, while forgetting everything else. This state is called the Hypnotic Rapport.
During the hypnosis process the hypnotist can awake certain parts of patient's consciousness. On contrary, hpnotist can also put to sleep some parts of patient's consciousness. For examples the hypnotist can suggest that the pain in the leg does not exist. The leg is still ill, but the sensation of pain is blocked. It can be said that hypnotist erased the sensation of pain for a certain period of time.
Also, the patient can be suggested that he does not see objects or persons in front of him. The consciousness is programmed to ignore precisely specified object. On contrary, the patient's mind can be programmed to see, hear, or smell for example a flower. This suggestion will awaken functions of brain that will "notice" the flower.
Increased suggestibility is the most important phenomenon of hypnosis. The hypnotist's words are in center of attention, while anything else is irrelevant. The part of the consciousness that is dedicated to connection with hypnotist is active, while other parts are suppressed.