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 extrinsic thumb muscles are those originating in the forearm: extensor pollicis longus, extensor pollicis brevis, flexor pollicis longus, and abductor pollicis longus. The intrinsic thumbs muscles originates in the hand: opponens pollicis, flexor pollicis brevis, adductor pollicis and abductor pollicis brevis.