1 Tire width is the width of the tire measured in mm from sidewall to sidewall. This tire width is 225 mm.  Aspect ratio is the ratio of the height of the tire's cross-section to its width. On our example, 60 means that the height is equal to 60% of the tire's width.
The infrahyoid muscles or strap muscles are a group of four paired muscles in the anterior neck below the hyoid bone. They are responsible for depressing the hyoid during swallowing. Each muscle is supplied by different nerves from the ansa cervicalis.
The muscles in the upper back that tighten most frequently are called the Trapezius muscle. It is used to help support the neck and allow the side ways movement of the head as well as shoulder movement. The three most common causes are: Stress - the saying stress rides on your shoulders is true.