Basic Function In Auto Mode; Alternative Function In Lock Mode - FIOR & GENTZ NEURO MATIC Manual De Instrucciones

4.1 Basic Function in Auto Mode

In Auto mode, the NEURO MATIC is a system knee joint that locks and unlocks automati-
cally. When the patient stands wearing the orthosis, the NEURO MATIC system knee joint
is free moving. It is then secured through the integrated posterior offset (fig. 1) and the pa-
tient's remaining function of the knee and hip extension muscles. When the patient walks
wearing the orthosis, the NEURO MATIC system knee joint is locked at heel strike and the
accompanying plantar flexion (fig. 2). This is achieved by a mechanical connection from the
system ankle joint to the NEURO MATIC system knee joint. A slight extension moment dur-
ing heel lift unlocks the system knee joint. The unlocking moment can be adjusted by the
dorsiflexion of the system ankle joint.
Locking
The foot's plantar flexion is initiated when the heel is set on the ground.
Thus, the system stirrup of the system ankle joint is pressed upwards
which pushes the wire (mechanical connection from system ankle joint
to NEURO MATIC system knee joint) upwards, too. This results in the
locking pawl meshing into the toothing of the toothed ring (fig. 3). The
system joint is now locked.
Unlocking
The foot's dorsiflexion is initiated when one leg is set back. Thus, the
spring force presses the system stirrup downwards and pulls the wire
downwards, too. Immediately after applying a slight extension moment,
the locking pawl of the NEURO MATIC system knee joint falls down-
wards out of the toothing of the toothed ring due to gravity and the
system joint is free moving in swing phase (fig. 4).

4.2 Alternative Function in Lock Mode

In Lock mode, the NEURO MATIC system knee joint is a locked joint
to provide motion control. It is permanently mechanically locked in a
determined extension.
fig. 1
fig. 2
fig. 3
fig. 4
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