Slacklining: A narrative review on the origins, neuromechanical models and therapeutic use

Table 1 Glossary of definitions and explanation of scientific terms

Scientific Term	Explanation/definition
Fitts Law	Time to accomplish movement linearly increases with the logarithm of the index of the task difficulty
Hopf bifurcation point	A critical point where a system's stability switches and a periodic solution arises
Two-thirds Power Law	Expresses the robust local relationship between the geometrical and temporal aspects of human movement
Elliptic geometry	Non-Euclidean (or non-ordinary) geometry stating that there are no lines parallel to any given line, this is an example of Riemannian geometry
Affine Transformations	A transformation that preserves lines and parallelism
Equi-affine Transformations	a transformation that preserves areas, in addition to lines and parallelism
Temporal Segmentation	The central or brain action of breaking down motion sequences into different actions
Isochrony Principle	The duration of voluntary movement remains approximately constant across a range of movement distances; that is, movement duration is independent of movement extent
Kinematic redundancy	Kinematic redundancy occurs when a manipulator has more degrees of freedom than those strictly required to execute a given task. Additional active joints and interlinked segments improve both mobility and the available degrees of freedom
Inter-segmental law of coordination	A kinematic law that describes the coordination patterns among the elevation angles of the lower limb segments during locomotion (Borghese). It is reliant on accurate progressive timing of muscular contractions in adjacent segments and appendages