Dystonia sustained abnormal limb posture
Conditions
Interventions
None listed
Sponsors
Leids Universitair Medisch Centrum
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: Healthy volunteer, who is capable of following instructions to the letter
Exclusion criteria
Exclusion criteria: Medical history of neurologic disorders with extremity involvement. Hypersensitivity to anestetics: marcaine, lidocaine, bupivavacaine, prilocaine or mepivacaine. Known to have low blood pressure or a history of cardiac or vascular diseases or diabetes mellitus. Orthopedic or other diseases of the right foot/ankle Prior surgery of the right foot/ankle.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Healthy humans can easily adapt their posture control strategies to perform a wide range of tasks. The feedback response to changing forces and positions can be characterized by the measured admittance: the causal dynamic relationship between force (input) and position (output), essentially describing the mass-spring-damper characteristics of a limb. It is in fact the inverse of impedance or to put it in a more clinical way: stiffness. For different tasks a different admittance is optimal. In the experiment the adaptability of the admittance is determined using three task instructions: 1. Force task: *give way to force perturbations* 2. Relax task: *relax; do not react to the force perturbations* 3. Position task: *resist force perturbations*. As the primary outcome variable the admittance at the lowest frequency will be used for each task; this is the closest approximation to the true stiffness (the impedance at the zero frequency). | — |
Countries
Netherlands
Outcome results
None listed