Cervical pillow with variable thickness head and neck portions

A pillow for the reduction of neck strain, snoring and obstructive sleep apnea by maximizing the opening of a user's oropharynx and for maintaining the user's cervical spine and thoracic spine in substantially coextensive alignment throughout a rolling movement from a supine to a lateral position comprising

• (a) a pair of elevated left and right lateral neck resting portions each having a convexly curved upper surface with a predetermined uncompressed vertical height;
• (b) a lower central supine neck resting portion lying between said elevated left and right lateral neck resting portions, said central portion having
• a convexly curved upper surface adapted to be compressed into substantially continuous contact with the curved nape of a neck of said user lying in a supine position,
• said upper surface having a maximum compressed vertical height and curvature under the weight of said user so that the natural curvature of said user's neck is maintained and the head and neck are fully extended backwards towards a mattress underlying said pillow and said user's occiput rests directly on the underlying mattress, thus maximizing the cross-sectional area of said user's oropharynx when in a supine position;
• (c) a pair of neck resting transitional pillow portions connecting said neck resting central portion with said left and right neck resting lateral portions, said neck resting transitional pillow portions having upwardly sloping curved upper surfaces connecting said curved surface of said central neck resting portion with said curved surfaces of said left and right neck resting lateral portions, said curved upper surfaces of said left and right neck resting lateral portions having an uncompressed vertical height greater than an uncompressed vertical height of said neck resting central portion, and
• (d) a pair of lateral headrest portions each respectively connected to one of said left and right lateral neck resting portions, said lateral headrest portions defining the legs of a U-shaped pillow structure and said lateral, supine and transitional neck resting portions defining the bottom of said U-shaped pillow structure, said lateral headrest portions further being substantially planar and horizonal and having a maximum uncompressed vertical height less than said uncompressed vertical height of said curved surfaces of said left and right lateral neck resting portions so that said user's cervical spine is maintained in substantially coextensive alignment with the user's thoracic spine when said user's head laterally rests against the lateral head resting portions,
• wherein a perpendicular distance measured from the center line of said pillow to the juncture between the lateral neck resting portions and the transitional portions is less than or equal to a distance measured from said center line to a lateral edge of said user's shoulder when lying in said supine position, thereby ensuring that when said user rolls from the supine position to a lateral position,
• (i) the user's head pivots about an axis defined by a humerus of the user so that a lateral side of said user's head is positioned in an abutting relationship with one of said lateral headrest portions when said user is in a lateral decubitus position and
• (ii) the neck of said user lies in substantially continuous abutment with the curved surface of one of said transitional portions and one of said left or right lateral neck resting portions, and
• (iii) the user's cervical spine and thoracic spine are in substantially coextensive alignment throughout the rolling movement.