title: Quantitative assessment of Parkinson's disease deficits.
abstract: OBJECTIVE
  To quantitatively analyze the tremor and rigidity due to Parkinson's disease.
  
  
  METHODS
  38 patients with Parkinson's disease (PD) ranging in age from 45 to 72 years and 211 normal subjects aged from 16 to 76 years were investigated. The frequency and range of tremor, the muscle tone of the upper limbs in elbow were detected by a computerized video motion detecting system and a new invented apparatus which can detects skeletal muscle tone.
  
  
  RESULTS
  For the PD patients, the frequency of resting tremors was detected in 4 to 6 per second. For extensor and flexor in the PD patients, the value of muscle tone was higher than that of normal subjects and the value of muscle tone in flexor was higher than that of extensor. The rigidity increased gradually with repeat passive movement. The curves of rigidity were shown on computer screen or printed out. The data of rigidity were compared with the M-A Scale. A patient who was suspected to suffer from PD above by the equipments and found the muscle tone was higher than normal. In another PD patient the rigidity was obvious at one side and the muscle tone in "normal side" was also high. These equipments were used to record changes of rigidity and tremor in one more PD patient taking with different drugs in order to see the drug effect.
  
  
  CONCLUSIONS
  Quantitative methods are useful to analyse the motion disorders due to PD.
authors.affiliation: Department of Neurology, Xuan Wu Hospital, Beijing 100053, China.
authors.forename: T
authors.initials: T
authors.lastname: Zhang
authors.forename: G
authors.initials: G
authors.lastname: Wei
authors.forename: Z
authors.initials: Z
authors.lastname: Yan
authors.forename: M
authors.initials: M
authors.lastname: Ding
authors.forename: C
authors.initials: C
authors.lastname: Li
authors.forename: H
authors.initials: H
authors.lastname: Ding
authors.forename: S
authors.initials: S
authors.lastname: Xu
mesh_terms: D000368:Aged; D003936:Diagnosis, Computer-Assisted; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009127:Muscle Rigidity / Q000209:etiology; D010300:Parkinson Disease / Q000150:complications / Q000175:diagnosis*; D014202:Tremor / Q000209:etiology*