Anatomically, the model shows the majority of the structures found in the hand. On the model, all the skin has been removed, and you can therefore clearly see the muscles, tendons and ligaments.
On the dorsal side of the hand (the side where the back of the hand is located) the extensor retina is shown, where the tendons from the extensor muscles of the forearm pass through before they attach to the bottom of the hand.
On the palmar side of the hand (the side where the palm is located) the model is divided into 3 layers, of which the outermost 2 can be removed. The following parts are removable:
Aponeurosis palmaris with M. palmaris brevis (outermost removable layer)
M. abductor pollicis brevis, M. flexor pollicis brevis, M. abductor digiti minimi, M. flexor digiti minimi brevis, flexor retinaculum (inner removable layer)
When these are removed, the deep-lying structures in the hand are seen, just as the vessels and nerves that pass out to the fingers become visible.
Among other things, the canalis carpi with the contents of the median nerve, tendo M. flexor pollicis longus, tendo M. flexor digitorum superficialis and tendo M. flexor digitorum profondus are seen.
In addition, the model shows the 3 joints of the fingers with associated ligaments, as well as how the superficial and deep flexor tendons pass in relation to each other on their way out to the finger bones (chiasma tendinum).
Vessels show the large arteries that pass from the forearm down to the hand, as well as how the fingers receive their blood supply from the arcus palmaris superficialis. Veins are not visible on this model.
