A5010475495- Botulinum Toxin and Related Neurological Disorders
- Neurological disorders and treatments
- Parkinson's Disease Mechanisms and Treatments
- Musculoskeletal pain and rehabilitation
- Facial Nerve Paralysis Treatment and Research
- Motor Control and Adaptation
- Balance, Gait, and Falls Prevention
- Trigeminal Neuralgia and Treatments
- Geological and Tectonic Studies in Latin America
- Parkinson's Disease and Spinal Disorders
- Cerebral Palsy and Movement Disorders
- Muscle activation and electromyography studies
University of California, Berkeley
2024
University of California, San Diego
2019-2023
Libertador Experimental Pedagogical University
2008
Abstract Objective Deviated head posture is a defining characteristic of cervical dystonia (CD). Head severity typically quantified with clinical rating scales such as the Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS). Because are inherently subjective, they susceptible to variability that reduces their sensitivity outcome measures. The could be circumvented methods measure CD objectively. However, previously used objective require specialized equipment and have been limited...
Although abnormal head and neck postures are defining features of cervical dystonia (CD), tremor (HT) is also common. However, little known about the relationship between HT in CD.We analyzed clinical data video recordings from 185 patients enrolled by Dystonia Coalition. We calculated likelihood their type ("regular" vs. "jerky") given directionality postures, disease duration, sex, age.Patients with retrocollis were more likely to have than anterocollis (X2 (1, N = 121) 7.98, p 0.005)....
<strong>Background:</strong> Although abnormal head and neck postures are defining features of cervical dystonia (CD), tremor (HT) is also common. However, little known about the relationship between HT in CD. <strong>Methods:</strong> We analyzed clinical data video recordings from 185 patients enrolled by Dystonia Coalition. calculated likelihood their type ("regular" vs. "jerky") given directionality postures, disease duration, sex, age. <strong>Results:</strong> Patients with retrocollis...
Abstract Deterioration in motor control is a hallmark of aging, significantly contributing to decline quality life. More controversial the question whether and how aging impacts sensorimotor learning. We hypothesized that inconsistent picture observed current literature can be attributed at least two factors. First, studies tend underpowered. Second, learning assays used these experiments reflect, varying degrees, operation multiple processes, making it difficult make inferences across...
Introduction: A common view is that head tremor (HT) in cervical dystonia (CD) decreases when the assumes an unopposed dystonic posture and increases held at midline. However, this has not been examined with objective measures a large, multicenter cohort. Methods: For 80 participants CD HT, we analyzed videos from examination segments which were instructed to 1) let their drift its most comfortable position (null point) then 2) hold straight We used our previously developed Computational...
<strong>Background:</strong> Sensory tricks are compensatory gestures that cervical dystonia (CD) patients use to reduce abnormal neck posture and movements. Although sensory common in CD, little is known about whether trick efficacy changes over time or has effect on quality of life. <strong>Methods:</strong> We analyzed clinical data video recordings from 188 with isolated CD. calculated the duration CD assessed Toronto Western Spasmodic Torticollis Rating Scales Cervical Dystonia Impact...
<strong>Background:</strong> A defining characteristic of dystonia is its position-dependence. In cervical (CD), sensory tricks ameliorate head tremor (HT). But it remains unknown whether raising the arms alone has same impact. <strong>Methods:</strong> We analyzed data collected from patients enrolled by Dystonia Coalition. For 120 with HT, we assessed how their without touching changed HT severity. <strong>Results:</strong> Forty-eight out exhibited changes in severity when arms. These...
Abstract To compare the inter-rater reliability (IRR) of five clinical rating scales for video-based assessment hemifacial spasm (HFS) motor severity. We evaluated video recordings 45 HFS participants recruited through Dystonia Coalition. In Round 1, six clinicians with expertise in assessed participants’ severity used to measure HFS: Jankovic scale (JRS), Hemifacial Spasm Grading Scale (HSGS), Samsung Medical Center (SMC) grading system spasms (Lee’s scale), intensity (Chen’s and a modified...
Sensory tricks are compensatory gestures that cervical dystonia (CD) patients use to reduce abnormal neck posture and movements. Although sensory common in CD, little is known about whether trick efficacy changes over time or has effect on quality of life.We analyzed clinical data video recordings from 188 with isolated CD. We calculated the duration CD assessed Toronto Western Spasmodic Torticollis Rating Scales Cervical Dystonia Impact Profile (CDIP-58).A longer corresponded a less...