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Biology - Brain: Brain Waves

When you drop a small stone in water, you see waves. Similarly our heart and our brain have wave patterns. The wave pattern of the heart is measured by ECG (electro cardiograph). The brain waves are measured by EEG (electro encephalograph).

Using the brain wave studies, scientists have discovered that our brain waves are of four types.

The brain waves also have peaks that are similar to the peaks we see in water waves. The number of times the peak appears in one second is called "cycles per second ". For example, the electricity in India is of 50 cycles per second.

• Beta (13 to 25 cycles per second)
  This brain wave indicates that your conscious mind is in control. It indicates a mental state of logical thought, analysis, and action. You are alert and awake talking, speaking, doing, solving problems, etc.
   
• Alpha (8 to 12 cycles per second)
  This brain wave indicates relaxation and meditation. It is a state of relaxed alertness good for inspiration, learning facts fast.
   
• Theta (4 to 8 cycles per second)
  Deep meditation. This is associated with life-like imagination. This is best for suggestibility and inspiration. This brain wave is dominant in children of age 2 to 5.
   
• Delta (0.5 to 4 cycles per second)
  Deep dreamless sleep. Deep relaxation.

Left brain and right brain working together

Usually the left brain and the right brain waves are independent. They reach peaks independent of each other. During meditation and deep relaxation, the left brain waves and the right brain waves happen together.

 

For both, the peaks are reached together. This is called synchronization. Scientists now believe that synchronization makes much greater mind power available. This is associated with learning large amounts of information very quickly as well as with creativity. Brain self-control

Scientists had long believed that brain activity such as brain waves and secretion of brain chemicals were beyond conscious control. But, experiments on Swami Rama of the Himalayas and on biofeedback have now changed that belief. Now it is proven that some people can control their brain waves, etc. 

Link: http://www.bibliotecapleyades.net/ciencia/ciencia_brain01.htm

Making relaxation techniques a part of your life

The best way to start and maintain a relaxation practice is to incorporate it into your daily routine. Between work, family, school, and other commitments, though, it can be tough for many people to find the time. Fortunately, many of the techniques can be practiced while you’re doing other things.

Rhythmic exercise as a mindfulness relaxation technique

Rhythmic exercise—such as running, walking, rowing, or cycling—is most effective at relieving stress when performed with relaxation in mind. As with meditation, mindfulness requires being fully engaged in the present moment, focusing your mind on how your body feels right now. As you exercise, focus on the physicality of your body’s movement and how your breathing complements that movement. If your mind wanders to other thoughts, gently return to focusing on your breathing and movement.

If walking or running, for example, focus on each step—the sensation of your feet touching the ground, the rhythm of your breath while moving, and the feeling of the wind against your face.

Tips for fitting relaxation techniques into your life

• If possible, schedule a set time to practice each day. Set aside one or two periods each day. You may find that it’s easier to stick with your practice if you do it first thing in the morning, before other tasks and responsibilities get in the way.
• Practice relaxation techniques while you’re doing other things. Meditate while commuting to work on a bus or train, or waiting for a dentist appointment. Try deep breathing while you’re doing housework or mowing the lawn. Mindfulness walking can be done while exercising your dog, walking to your car, or climbing the stairs at work instead of using the elevator. Once you’ve learned techniques such as tai chi, you can practice them in your office or in the park at lunchtime.
• If you exercise, improve the relaxation benefits by adopting mindfulness. Instead of zoning out or staring at a TV as you exercise, try focusing your attention on your body. If you’re resistance training, for example, focus on coordinating your breathing with your movements and pay attention to how your body feels as you raise and lower the weights.
• Avoid practicing when you’re sleepy. These techniques can relax you so much that they can make you very sleepy, especially if it’s close to bedtime. You will get the most benefit if you practice when you’re fully awake and alert. Do not practice after eating a heavy meal or while using drugs, tobacco, or alcohol.
• Expect ups and downs. Don’t be discouraged if you skip a few days or even a few weeks. It happens. Just get started again and slowly build up to your old momentum.

Link: http://www.helpguide.org/mental/stress_relief_meditation_yoga_relaxation.htm

Relaxation technique 2: Progressive muscle relaxation for stress relief

Progressive muscle relaxation involves a two-step process in which you systematically tense and relax different muscle groups in the body.

With regular practice, progressive muscle relaxation gives you an intimate familiarity with what tension—as well as complete relaxation—feels like in different parts of the body. This awareness helps you spot and counteract the first signs of the muscular tension that accompanies stress. And as your body relaxes, so will your mind. You can combine deep breathing with progressive muscle relaxation for an additional level of stress relief.

Practicing progressive muscle relaxation

Before practicing Progressive Muscle Relaxation, consult with your doctor if you have a history of muscle spasms, back problems, or other serious injuries that may be aggravated by tensing muscles.

Most progressive muscle relaxation practitioners start at the feet and work their way up to the face. For a sequence of muscle groups to follow, see the box below.

• Loosen your clothing, take off your shoes, and get comfortable.
• Take a few minutes to relax, breathing in and out in slow, deep breaths.
• When you’re relaxed and ready to start, shift your attention to your right foot. Take a moment to focus on the way it feels.
• Slowly tense the muscles in your right foot, squeezing as tightly as you can. Hold for a count of 10.
• Relax your right foot. Focus on the tension flowing away and the way your foot feels as it becomes limp and loose.
• Stay in this relaxed state for a moment, breathing deeply and slowly.
• When you’re ready, shift your attention to your left foot. Follow the same sequence of muscle tension and release.
• Move slowly up through your body, contracting and relaxing the muscle groups as you go.
• It may take some practice at first, but try not to tense muscles other than those intended.

Progressive Muscle Relaxation Sequence

The most popular sequence runs as follows:

Right foot* Left foot Right calf Left calf Right thigh

Left thigh Hips and buttocks Stomach Chest Back

Right arm and hand Left arm and hand Neck and shoulders Face

* If you are left-handed you may want to begin with your left foot instead.

Link: http://www.helpguide.org/mental/stress_relief_meditation_yoga_relaxation.htm