Tremor quantification and its measurements on parkinsonian patients

“…The frequency of vibration in resting tremor in Parkinson's disease ranges from 3-8Hz and that of essential tremor ranges from 4-12Hz [4]. The use of accelerometers make the evaluation process encumbered and affects the normal dexterity of the subject.…”

Section: Introductionmentioning

confidence: 99%

Design of a haptic environment to study the effect of loading on resting and action tremors

Sajith

Chaudhuri

2013

2013 10th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

View full text Add to dashboard Cite

We propose a novel design of haptic virtual environments for the quantification of both resting and action tremor. To quantify the resting tremor, a haptic virtual environment simulating the movement of hand is subjected to a variable resistance. The subject is asked to rest his/her hand in this environment and the velocity of hand motion (tremor) is captured by the haptic device. The variation of tremor parameters with virtual loading of the hand is estimated. To quantify action tremor, a dynamic virtual haptic environment is designed where a subject is asked to move a rigid body from a starting point to an end point along a specified path. During this manipulation, velocity of hand motion is captured by the haptic device to extract tremor using appropriate signal processing tools. The mass of the rigid body is increased to study the effect of loading on tremor.

show abstract

“…This is later processed off-line to detect the presence of tremors. Accelerometers may be fixed on the subject's palm and the signals are transmitted to a microcontroller for further processing [1]. The tremor detection algorithm runs on every 3 sec window of data, and determines the frequency and amplitude of tremor along all three axes.…”

Section: Introductionmentioning

confidence: 99%

“…In all of the above methods, the acquired data is analysed in frequency domain to obtain the frequency of tremor. This is because tremor is a pseudo-rhythmic activity and typically there is a frequency associated with each kind of tremor [1]. The normal hand tremor has a frequency of 9-25 Hz and is of very small amplitude.…”

Section: Introductionmentioning

confidence: 99%

Hand tremor analysis using deformable object manipulation in a haptic environment

Sajith

Gopal

Chaudhuri

2013

2013 IEEE Point-of-Care Healthcare Technologies (PHT)

View full text Add to dashboard Cite

We have developed a system for analysing hand tremors using a deformable object manipulation in a haptic environment. The subject performs some specific manipulative tasks, like moving a soft object from one location to another, in a virtual 3D environment using a haptic device. While the task is being performed, the velocity of hand movement is sampled by the haptic device and this is later processed for tremor analysis. To validate the efficacy of this system and to compare it with standard methods of tremor analysis using accelerometers, we have simultaneously collected velocity data through accelerometers and compared our results with those obtained from the accelerometer based method. We have designed the necessary haptic rendering system as well as the signal analysis schemes to build the complete system.

show abstract

Tremor quantification and its measurements on parkinsonian patients

Cited by 10 publications

References 3 publications

Hand Tremor Quantification Using Virtual Object Manipulation in a Haptic Environment

Hand Tremor Quantification Using Virtual Object Manipulation in a Haptic Environment

Design of a haptic environment to study the effect of loading on resting and action tremors

Hand tremor analysis using deformable object manipulation in a haptic environment

Contact Info

Product

Resources

About