ISO 29783-1:2008

INTERNATIONAL ISO
STANDARD 29783-1
First edition
2008-12-01

Prosthetics and orthotics —
Vocabulary —
Part 1:
Normal gait
Prothèses et orthèses — Vocabulaire —
Partie 1: Démarche normale




Reference number
ISO 29783-1:2008(E)
©
ISO 2008

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ISO 29783-1:2008(E)
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ISO 29783-1:2008(E)
Foreword
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ISO 29783-1 was prepared by Technical Committee ISO/TC 168, Prosthetics and orthotics.
ISO 29783 consists of the following parts, under the general title Prosthetics and orthotics — Vocabulary:
⎯ Part 1: Normal gait
⎯ Part 2: Prosthetic gait
⎯ Part 3: Pathological gait

© ISO 2008 – All rights reserved iii

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INTERNATIONAL STANDARD ISO 29783-1:2008(E)

Prosthetics and orthotics — Vocabulary —
Part 1:
Normal gait
1 Scope
This part of ISO 29783 establishes a vocabulary for the description of normal gait.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
body load
loading
force exerted by the foot upon the ground at any time during the stance phase due to gravity and the forward,
sideways and vertical accelerations of the body mass
2.2
cadence
number of steps taken per unit of time in steps per second
2.3
double support
those two parts of the gait cycle when both limbs are in contact with the ground
NOTE The first of these (approximately 0 % to 10 % of the gait cycle) commences after initial ground contact (and
ends as the contralateral limb commences initial swing) the second (approximately 50 % to 60 % of the gait cycle)
commences at the beginning of pre-swing (and ends as the limb commences initial swing).
2.4
gait cycle
the sequence of actions of a lower limb usually taken from initial contact of the foot until the next initial contact
of the same foot when walking or running
2.5
ground reaction force
reaction by the ground to the force exerted by the foot at any time during the stance phase
2.6
pelvic obliquity
alignment of the pelvis (moves upwards or downwards) in the coronal plane
2.7
pelvic rotation
alignment of the pelvis (moves forwards or ba
...