Quantifying Rigidity with a New Computerized Elbow Device

Relja, Maja; Petravić, Damir; Kolaj, M.

doi:10.1097/00002826-199619020-00003

Cited by 17 publications

(27 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Baseline mean rigidity values in schizophrenic patients (1.71 ± 0.84 Nm) were slightly higher than those in healthy control (1.58 ± 0.96 Nm), (Relja et al 1996). Treatment with olanzapine significantly (F= 7.53, df= 1,11; p = 0.019) decreased, while treatment with fluphenazine significantly (F= 7.08, df= 1,9; p= 0.026) increased the rigidity values (Fig.…”

Section: Resultsmentioning

confidence: 80%

“…Rigidity assessment was performed using computerized instrumental measurement by elbow device "Tonometre" (Relja et al, 1996). A patient was comfortable seated in a chair, with the tested forearm supported horizontally on an arm board of the tonometre.…”

Section: Methodsmentioning

confidence: 99%

“…The first 10 measurements were preparatory, aimed to achieve maximal relaxation of the patients. The second 10 cycles were transmitted and evaluated, with the results expressed in Newton meters (Nm), as mean ± SD of 10 measurements (Relja et al, 1996).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

The effects of olanzapine and fluphenazine on plasma cortisol, prolactin and muscle rigidity in schizophrenic patients: A double blind study

Jakovljević

Pivac

Mihaljević-Peleš

et al. 2007

Progress in Neuro-Psychopharmacology and Biological Psychiatry

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 80%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

The effects of olanzapine and fluphenazine on plasma cortisol, prolactin and muscle rigidity in schizophrenic patients: A double blind study

Jakovljević

Pivac

Mihaljević-Peleš

et al. 2007

Progress in Neuro-Psychopharmacology and Biological Psychiatry

View full text Add to dashboard Cite

“…Webster and his colleagues [21], [22], [25] had a torque motor move the forearm over 100° with a constant velocity of 20 deg/s so that the full flexion-extension cycle took 10s to complete. In the later studies, faster oscillations with a frequency of 0.5 Hz over a shorter angular range of 40°-50°w ere used in the elbow experiments [14], [15], and rigidity in the wrist was tested using 1-1.5 Hz sinusoidal oscillations with a ± 30° displacement [13]. In a study of rigidity at the wrist, Teravainen and his colleagues [11] explored a range of waveform parameters: displacements from ± 15° to ± 30°, sinusoidal oscillations with frequencies from 0.2 Hz to 1.6 Hz, and a constant velocity waveform with a range of velocities from 24 to 190 deg/s.…”

Section: Discussionmentioning

confidence: 99%

“…Activated rigidity refers to a well-known clinical observation that resistance of the passively moved limb increases when the patient is asked to perform a concurrent active movement task with the other limb. In a number of previous studies, calculated mechanical work done by the rigid limb has been used as a quantitative measure of both resting and activated rigidity [11], [13]- [15], [23]- [25].…”

Section: Introductionmentioning

confidence: 99%

Effects of STN DBS on Rigidity in Parkinson's Disease

Shapiro

Vaillancourt

Sturman

et al. 2007

IEEE Trans. Neural Syst. Rehabil. Eng.

View full text Add to dashboard Cite

We quantified the effects of deep brain stimulation (DBS) of the subthalamic nucleus (STN) and medication on Parkinsonian rigidity using an objective measure of work about the elbow joint during a complete cycle of imposed 1-Hz sinusoidal oscillations. Resting and activated rigidity were analyzed in four experimental conditions: 1) off treatment; 2) on DBS; 3) on medication; and 4) on DBS plus medication. Rigidity at the elbow joint was also assessed using the Unified Parkinson's Disease Rating Scale (UPDRS). We tested ten patients who received STN DBS and ten age-matched neurologically healthy control subjects. The activated rigidity condition increased work in both Parkinson's disease (PD) patients and control subjects. In PD patients, STN DBS reduced both resting and activated rigidity as indicated by work and the UPDRS rigidity score. This is the first demonstration that STN stimulation reduces rigidity using an objective measure such as work. In contrast, the presurgery dose of antiparkinsonian medication did not significantly improve the UPDRS rigidity score and reduced work only in the activated rigidity condition. Our results suggest that STN DBS may be more effective in alleviating rigidity in the upper limb of PD patients than medications administered at presurgery dosage level.

show abstract

Difficult stent delivery: Use of an aspiration catheter as a “sheath”

Ashikaga

Nishizaki

Yamawake

2008

Cathet Cardio Intervent

View full text Add to dashboard Cite

This is a report of a case in which stent delivery to the lesion location proved difficult because of severely calcified and tortuous proximal vasculature. Efforts to deliver a stent using a buddy wire, anchoring technique and five-in-seven guiding system were unsuccessful, whereas an aspiration catheter enabled stent delivery to the target lesion. This technique offers a potential alternative for cases in which some stent delivery methods are problematic. In addition, this technique may also prevent potential injury to drug-eluting polymer during stent delivery.

show abstract

Quantifying Rigidity with a New Computerized Elbow Device

Cited by 17 publications

References 0 publications

The effects of olanzapine and fluphenazine on plasma cortisol, prolactin and muscle rigidity in schizophrenic patients: A double blind study

The effects of olanzapine and fluphenazine on plasma cortisol, prolactin and muscle rigidity in schizophrenic patients: A double blind study

Effects of STN DBS on Rigidity in Parkinson's Disease

Difficult stent delivery: Use of an aspiration catheter as a “sheath”

Contact Info

Product

Resources

About