Abstract
To develop a new measurement tool for quantitatively detecting the finger movement of a patient with Parkinson's disease (PD), we designed a magnetic sensing system consisting of a magnetic induction coil, a sensing coil, and a circuit unit. The sensing coil detects the inducted magnetic field that varies with the distance between the two coils, and the detected signals are demodulated in the circuit unit in order to obtain the variation voltage from the oscillation frequency. To obtain a coefficient for converting voltage to distance, we measured the output voltages for seven fixed finger positions of 12 normal volunteers. The voltage differences corresponding to the finger movement in 20 PD patients, six age-matched controls, and 12 normal volunteers were then recorded for 30 s. To investigate the velocity and acceleration of the finger movement, we calculated their waveforms from the measured displacement waveform. We also detected the main frequency of the tapping rhythm by using a fast Fourier transform (FFT). The averaged amplitude of each waveform decreased with the disorder in the Hoehn-Yahr (HY) stage, while the averaged tapping frequency of PD patients did not have any correlation with this stage. It can be concluded that this magnetic sensing system can assess finger movement quantitatively.
| Original language | English |
|---|---|
| Pages (from-to) | 253-260 |
| Number of pages | 8 |
| Journal | Neuroscience Research |
| Volume | 49 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jun 2004 |
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Keywords
- Finger tapping
- Magnetic detection
- Parkinson's disease
ASJC Scopus subject areas
- Neuroscience(all)
Cite this
Quantitative magnetic detection of finger movements in patients with Parkinson's disease. / Kandori, Akihiko; Yokoe, Masaru; Sakoda, Saburo; Abe, Kazuo; Miyashita, Tsuyoshi; Oe, Hiroshi; Naritomi, Hiroaki; Ogata, Kuniomi; Tsukada, Keiji.
In: Neuroscience Research, Vol. 49, No. 2, 06.2004, p. 253-260.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Quantitative magnetic detection of finger movements in patients with Parkinson's disease
AU - Kandori, Akihiko
AU - Yokoe, Masaru
AU - Sakoda, Saburo
AU - Abe, Kazuo
AU - Miyashita, Tsuyoshi
AU - Oe, Hiroshi
AU - Naritomi, Hiroaki
AU - Ogata, Kuniomi
AU - Tsukada, Keiji
PY - 2004/6
Y1 - 2004/6
N2 - To develop a new measurement tool for quantitatively detecting the finger movement of a patient with Parkinson's disease (PD), we designed a magnetic sensing system consisting of a magnetic induction coil, a sensing coil, and a circuit unit. The sensing coil detects the inducted magnetic field that varies with the distance between the two coils, and the detected signals are demodulated in the circuit unit in order to obtain the variation voltage from the oscillation frequency. To obtain a coefficient for converting voltage to distance, we measured the output voltages for seven fixed finger positions of 12 normal volunteers. The voltage differences corresponding to the finger movement in 20 PD patients, six age-matched controls, and 12 normal volunteers were then recorded for 30 s. To investigate the velocity and acceleration of the finger movement, we calculated their waveforms from the measured displacement waveform. We also detected the main frequency of the tapping rhythm by using a fast Fourier transform (FFT). The averaged amplitude of each waveform decreased with the disorder in the Hoehn-Yahr (HY) stage, while the averaged tapping frequency of PD patients did not have any correlation with this stage. It can be concluded that this magnetic sensing system can assess finger movement quantitatively.
AB - To develop a new measurement tool for quantitatively detecting the finger movement of a patient with Parkinson's disease (PD), we designed a magnetic sensing system consisting of a magnetic induction coil, a sensing coil, and a circuit unit. The sensing coil detects the inducted magnetic field that varies with the distance between the two coils, and the detected signals are demodulated in the circuit unit in order to obtain the variation voltage from the oscillation frequency. To obtain a coefficient for converting voltage to distance, we measured the output voltages for seven fixed finger positions of 12 normal volunteers. The voltage differences corresponding to the finger movement in 20 PD patients, six age-matched controls, and 12 normal volunteers were then recorded for 30 s. To investigate the velocity and acceleration of the finger movement, we calculated their waveforms from the measured displacement waveform. We also detected the main frequency of the tapping rhythm by using a fast Fourier transform (FFT). The averaged amplitude of each waveform decreased with the disorder in the Hoehn-Yahr (HY) stage, while the averaged tapping frequency of PD patients did not have any correlation with this stage. It can be concluded that this magnetic sensing system can assess finger movement quantitatively.
KW - Finger tapping
KW - Magnetic detection
KW - Parkinson's disease
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UR - http://www.scopus.com/inward/citedby.url?scp=2342481660&partnerID=8YFLogxK
U2 - 10.1016/j.neures.2004.03.004
DO - 10.1016/j.neures.2004.03.004
M3 - Article
VL - 49
SP - 253
EP - 260
JO - Neuroscience Research
JF - Neuroscience Research
SN - 0168-0102
IS - 2
ER -