Zones Of Flexor Tendons In Hand

For treatment of flexor tendon injuries, the flexor aspect of the hand is divided into five zones

Zone I

Zone I extends from the tip of the finger to the middle of middle phalanx. Its contains only flexor digitorum profundus. [see below] Injuries in zone I would produce cut to flexor digitorum profundus only.

Tendon Zones In Flexor Aspect of Hand

Tendon Zones In Flexor Aspect of Hand { Image Credit:http://odlarmed.com/wp-content/uploads/2009/04/p5f3.jpg}

 

Zone II

Zone II extends from the middle of the middle phalanx to distal palmar crease. It contains both flexor tendon superficialis and flexor tendon profundus. It has been called “No Man’s Land” or “No Man’s Zone” because repair in this zone is very difficult.

Both the tendons are interwoven and surrounded by a number of pulleys in this zone

Zone III

It extends from distal palmar crease to the distal edge of flexor carpal ligament. It is also called lumbrical zone because of the presence of lumbricals in this zone.

Zone IV

It is the zone under the carpal ligament

Zone V

This zone is proximal to wrist joint

In case of thumb the third zone is very small. See below.

Tendon Zones of Flexor Aspect of Hand With Thumb Zones

Tendon Zones With Thumb Zones Defined Separately {Image credit http://emedicine.medscape.com/article/1245236-overview}

These zones are important from treatment point of view of flexor tendon injuries.

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