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.
Muscles of the orbit are also referred to as the extrinsic (arising externally) or extraocular muscles.There are 6 of these extraocular muscles that control eye movement (cows only have 4 of these), and one muscle that controls eyelid elevation. The origin is the Annulus of Zinn. 2  Rectus muscles are âstraightâ muscles. 3  Inferior rectus: In the neutral position, this muscle is responsible for depression, extorsion (outward, rotational movement) and adduction. 4  During adduction, the inferior rectus is responsible for extorsion, adduction and depression.