The location above the clavicle is also anatomically called the supraclavicular greater fossa and supraclavicular lesser fossa, collectively the supraclavicular fossa, also known as the scaphoid hyoid muscle clavicular triangle, which is the depression above the middle 1/3 of the clavicle. Its contents include the subclavian vein, the subclavian artery and the superior trunk of the brachial plexus nerve. The pulsation of the subclavian artery can be palpated at the base of the fossa of the supraclavicular fossa, which is also the injection site for brachial plexus block anesthesia. It is bounded by the lateral border of the clavicle, the lateral border of the sternocleidomastoid muscle and the inferior belly of the scapularis lingualis muscle, with the superficial fascia of the skin on its surface and the oblique angle muscle and prevertebral fascia on its deep surface.