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Flexors

Extrinsic

Intrinsic

1. Superficial Flexor

2. Deep Flexor

3. Flexor long of the first finger

1. Lumbricales

2. Palmares Interosseos

3. Dorsal Interossei

they divide

Slip Apparatus

System that allows to move one tendon over another

Paratendón

Mesotendón

Fibrous Slider

Synovial sheath

Surrounds the highly vascularized tendon

Form longitudinal vascular networks

Surrounds the tendon secreting fluid

Pulleys

Increases the pressure of the tendon against the pulleys

* Reduces the center of joint rotation of the tendon

* Keeps the tendons in contact with the bone angle

* 5 annular and 3 cruciform

Vascularization

Inside the digital channel

Outside the digital channel

Biomechanics

The distance between the origin of the tendon and the moment arm will determine the lever that the tendon can make

The absence of the pulleys creates the effect of "bowstring"; a greater moment arm and the consequent decrease in joint mobility

Genera un sistema de presión de tres puntos : uno anterior, uno flexor yuno sobre los flexores

A1 more resistant

A2 weaker

A2 A3 A4 maintain flexing functionality

Long link

Short link

by

They are

They are

In

In

Compound

Flexors and Extenders Tendons

Extenders

Hand and wrist

those with long fingers pierce the wrist

In

Two tabs

Has

Interosse triangular ligament

United

zones

1. It is part of the interfalangicas

2. Diaphysis of the middle phalanx

3. Proxial Interfalangica

4. Proximal phalanx diaphysis

5, Phalangeal metacarpus

6. Diaphysis of the metacarpal

7. External retinaculum

Extender mechanism

Short extensor of the first finger

Wrist expander

Long extensor of the first finger

Extender of the second finger

Carpal digital extender

Posterior cuciform

Makes