Sphenoid Bone Second

The 2nd sphenoid bone (lat. os cunei derma secundus, sinus) is a sesamoid osteochondral tissue framing the lower surface of the upper limb, covered with an articular capsule and a common aponeurosis. Forms a border space between the inner surface of the sternum, the outer surface of the clavicle and the gums of the hand, protects the nerve trunk of the same name from influences. The second sphenoid bone is formed by a body and three processes: a head with a slope in front and a hyaline line in the center. At the border of the internal tubercle in the direction of the head of the sphenoid bone, the spine of the lower limb (“accessory” joint) is projected; at the connection of the body and the apex, a semilunar notch is observed for