Anatomically Speaking...

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These illustrations are a true representation of how the spine is positioned when using the J-pillow compared with sleeping without any support. 

They have been drawn by a medical artist who has a comprehensive knowledge of science and the human anatomy. Photographs were taken of a person from the front and side when using the J-pillow and compared with photographs taken of a person using no support.  The photographs were then sketched around to form the outline of the images and the spine was then added in accordance with how the body was positioned in both situations. 

The illustrations clearly show the J-pillow keeps the spine more aligned and in more of a natural position when compared with illustrations of a spine where  no support was used.   
When you fall asleep without any support, your head can fall either to the front or to the side (as shown with the illustrations above on the right hand side). If it falls to the front you will probably experience that uncomfortable nodding head action which could cause you to wake up with a sudden jolt. 
Alternatively, if your head falls forward and stays there, you could end up maintaining an equally uncomfortable 'chin to chest' position. This will force your spine to bend forward (see illustration) and cause the muscles in the back of your neck to become overstretched. The chances are you'll wake up with pain around the nape of your neck region. 

The same principle applies when your head lolls over towards your shoulder.  When there is no support,  the weight of your head will force your spine to bend to either side. This stretches the muscles on the opposite side of your neck, which will probably cause you to have a stiff neck if you maintained this position for any length of time. You may also end up with a crick in your neck from the side that's been hunched over near to the shoulder (see illustration). 

The J-pillow may help reduce the possibility of you waking with pain in the neck region because it helps keep your head and spine supported and elevated. This is important because it means the muscles in your neck will not be over stretched.  The J-pillow helps to do this by slotting in around your neck and filling the gap between your head and shoulders, this helps keep your head elevated and your spine in its correct anatomical position. 

When sleeping in an upright position the best case scenario for a good quality sleep is to keep your spine aligned and to not put your body under any prolonged strain. As the illustrations above show, using the J-pillow may help you achieve this. Furthermore, if you already suffer from a painful neck and you use the J-pillow, you may experience a reduction in the  stiffness and soreness associated with your condition  when compared with sleeping without support.

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