Palm layer 4


4.  SUPERFicial palmar arch layer

We have now arrived at the layer of the superficial palmar arch after the removal of the palmar aponeurosis and the common digital nerves and vessels. We can now see clearly the midpalmar space containing blood vessels of the superficial palmar arch and nerves. Flexor retinaculum is also clearly seen. The lumbricals which arise from the radial sides of the flexor digitorum profundus can be clearly seen. The fibrous flexor sheath of each finger can also be clearly seen at this level. So also is the median nerve and the superficial branch of ulnar artery and the superficial branch of radial artery. Together they form the superficial palmar arch. In sum we have exposed this layer which contains the fibrous flexor sheath, the lumbricals, the superficial palmar arch consisting of the superficial branch of ulnar artery and the superficial branch of radial artery and the median nerve.

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