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Parkinson Disease: HELP
Articles by Nathan Ziman
Based on 4 articles published since 2009
(Why 4 articles?)

Between 2009 and 2019, Nathan Ziman wrote the following 4 articles about Parkinson Disease.
+ Citations + Abstracts
1 Article Parkinson's disease patient preference and experience with various methods of DBS lead placement. 2017

LaHue, Sara C / Ostrem, Jill L / Galifianakis, Nicholas B / San Luciano, Marta / Ziman, Nathan / Wang, Sarah / Racine, Caroline A / Starr, Philip A / Larson, Paul S / Katz, Maya. ·Department of Neurology, University of California, San Francisco, CA, USA. · Department of Neurology, University of California, San Francisco, CA, USA; Virginia Tech Carilion School of Medicine, Roanoke, VA, USA. · Department of Neurosurgery, University of California, San Francisco, CA, USA. · Department of Neurology, University of California, San Francisco, CA, USA. Electronic address: Maya.Katz@ucsf.edu. ·Parkinsonism Relat Disord · Pubmed #28615151.

ABSTRACT: INTRODUCTION: Physiology-guided deep brain stimulation (DBS) surgery requires patients to be awake during a portion of the procedure, which may be poorly tolerated. Interventional MRI-guided (iMRI) DBS surgery was developed to use real-time image guidance, obviating the need for patients to be awake during lead placement. METHODS: All English-speaking adults with PD who underwent iMRI DBS between 2010 and 2014 at our Center were invited to participate. Subjects completed a structured interview that explored perioperative preferences and experiences. We compared these responses to patients who underwent the physiology-guided method, matched for age and gender. RESULTS: Eighty-nine people with PD completed the study. Of those, 40 underwent iMRI, 44 underwent physiology-guided implantation, and five underwent both methods. There were no significant differences in baseline characteristics between groups. The primary reason for choosing iMRI DBS was a preference to be asleep during implantation due to: 1) a history of claustrophobia; 2) concerns about the potential for discomfort during the awake physiology-guided procedure in those with an underlying pain syndrome or severe off-medication symptoms; or 3) non-specific fear about being awake during neurosurgery. CONCLUSION: Participants were satisfied with both DBS surgery methods. However, identification of the factors associated with a preference for iMRI DBS may allow for optimization of patient experience and satisfaction when choices of surgical methods for DBS implantation are available.

2 Article Gamma Oscillations in the Hyperkinetic State Detected with Chronic Human Brain Recordings in Parkinson's Disease. 2016

Swann, Nicole C / de Hemptinne, Coralie / Miocinovic, Svjetlana / Qasim, Salman / Wang, Sarah S / Ziman, Nathan / Ostrem, Jill L / San Luciano, Marta / Galifianakis, Nicholas B / Starr, Philip A. ·Departments of Neurological Surgery and Nicole.Swann@ucsf.edu. · Departments of Neurological Surgery and. · Neurology. · Departments of Neurological Surgery and Kavli Institute for Fundamental Neuroscience, and Graduate Program in Neuroscience, University of California, San Francisco, California 94143. ·J Neurosci · Pubmed #27307233.

ABSTRACT: SIGNIFICANCE STATEMENT: Oscillations in brain networks link functionally related brain areas to accomplish thought and action, but this mechanism may be altered or exaggerated by disease states. Invasive recording using implanted electrodes provides a degree of spatial and temporal resolution that is ideal for analysis of network oscillations. Here we used a novel, totally implanted, bidirectional neural interface for chronic multisite brain recordings in humans with Parkinson's disease. We characterized an oscillation between cortex and subcortical modulators that is associated with a serious adverse effect of therapy for Parkinson's disease: dyskinesia. The work shows how a perturbation in oscillatory dynamics might lead to a state of excessive movement and also suggests a possible biomarker for feedback-controlled neurostimulation to treat hyperkinetic disorders.

3 Article National Randomized Controlled Trial of Virtual House Calls for People with Parkinson's Disease: Interest and Barriers. 2016

Dorsey, E Ray / Achey, Meredith A / Beck, Christopher A / Beran, Denise B / Biglan, Kevin M / Boyd, Cynthia M / Schmidt, Peter N / Simone, Richard / Willis, Allison W / Galifianakis, Nicholas B / Katz, Maya / Tanner, Caroline M / Dodenhoff, Kristen / Ziman, Nathan / Aldred, Jason / Carter, Julie / Jimenez-Shahed, Joohi / Hunter, Christine / Spindler, Meredith / Mari, Zoltan / Morgan, John C / McLane, Dedi / Hickey, Patrick / Gauger, Lisa / Richard, Irene Hegeman / Bull, Michael T / Mejia, Nicte I / Bwala, Grace / Nance, Martha / Shih, Ludy / Anderson, Lauren / Singer, Carlos / Zadikoff, Cindy / Okon, Natalia / Feigin, Andrew / Ayan, Jean / Vaughan, Christina / Pahwa, Rajesh / Cooper, Jessica / Webb, Sydney / Dhall, Rohit / Hassan, Anhar / Weis, Delana / DeMello, Steven / Riggare, Sara S / Wicks, Paul / Smith, Joseph / Keenan, H Tait / Korn, Ryan / Schwarz, Heidi / Sharma, Saloni / Stevenson, E Anna / Zhu, William. ·1 Department of Neurology, Rochester, New York. · 2 CHET, University of Rochester Medical Center , Rochester, New York. · 3 Duke University School of Medicine , Durham, North Carolina. · 4 Department of Biostatistics, University of Rochester , Rochester, New York. · 5 National Parkinson Foundation , Miami, Florida. · 6 Division of Geriatric Medicine and Gerontology, Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland. · 7 Simone Consulting , Sunnyvale, California. · 8 Department of Neurology, Philadelphia, Pennsylvania. · 9 Department of Biostatistics and Epidemiology, University of Pennsylvania , Philadelphia, Pennsylvania. · 10 Department of Neurology, University of California San Francisco , San Francisco, California. · 11 Northwest Neurological, PLLC , Spokane, Washington. · 12 Parkinson Center and Movement Disorders Program, Oregon Health and Science University , Portland, Oregon. · 13 Department of Neurology, Baylor College of Medicine , Houston, Texas. · 14 Department of Neurology and Neurosurgery, Johns Hopkins University , Baltimore, Maryland. · 15 Department of Neurology, Georgia Regents University , Augusta, Georgia . · 16 Department of Neurology, Duke Medical Center , Durham, North Carolina. · 17 Department of Neurology, Massachusetts General Hospital , Boston, Massachusetts. · 18 Struthers Parkinson's Center , Golden Valley, Minnesota. · 19 Department of Neurology, Beth Israel Deaconess Medical Center , Boston, Massachusetts. · 20 Department of Neurology, University of Miami , Miami, Florida. · 21 Department of Neurology, Northwestern University , Evanston, Illinois. · 22 The Feinstein Institute for Medical Research, North Shore-LIJ Health System , Manhasset, New York. · 23 Department of Neurology, Medical University of South Carolina , Charleston, South Carolina. · 24 Department of Neurology, University of Kansas Medical Center , Kansas City, Kansas. · 25 Parkinson's Institute , Sunnyvale, California. · 26 Department of Neurology, Mayo Clinic , Rochester, Minnesota. · 27 Center for Information Technology Research in the Interest of Society, University of California , Berkeley, California. · 28 Health Informatics Centre, Karolinska Institute , Stockholm, Sweden . · 29 PatientsLikeMe, Cambridge, Massachusetts . · 30 West Health Institute , La Jolla, California. ·Telemed J E Health · Pubmed #26886406.

ABSTRACT: BACKGROUND: Delivering specialty care remotely directly into people's homes can enhance access for and improve the healthcare of individuals with chronic conditions. However, evidence supporting this approach is limited. MATERIALS AND METHODS: Connect.Parkinson is a randomized comparative effectiveness study that compares usual care of individuals with Parkinson's disease in the community with usual care augmented by virtual house calls with a Parkinson's disease specialist from 1 of 18 centers nationally. Individuals in the intervention arm receive four virtual visits from a Parkinson's disease specialist over 1 year via secure, Web-based videoconferencing directly into their homes. All study activities, including recruitment, enrollment, and assessments, are conducted remotely. Here we report on interest, feasibility, and barriers to enrollment in this ongoing study. RESULTS: During recruitment, 11,734 individuals visited the study's Web site, and 927 unique individuals submitted electronic interest forms. Two hundred ten individuals from 18 states enrolled in the study from March 2014 to June 2015, and 195 were randomized. Most participants were white (96%) and college educated (73%). Of the randomized participants, 73% had seen a Parkinson's disease specialist within the previous year. CONCLUSIONS: Among individuals with Parkinson's disease, national interest in receiving remote specialty care directly into the home is high. Remote enrollment in this care model is feasible but is likely affected by differential access to the Internet.

4 Article Clinical outcomes using ClearPoint interventional MRI for deep brain stimulation lead placement in Parkinson's disease. 2016

Ostrem, Jill L / Ziman, Nathan / Galifianakis, Nicholas B / Starr, Philip A / Luciano, Marta San / Katz, Maya / Racine, Caroline A / Martin, Alastair J / Markun, Leslie C / Larson, Paul S. ·Surgical Movement Disorders Center, Department of Neurology; and  · Departments of 2 Neurological Surgery and. · Radiology, University of California, San Francisco, California. ·J Neurosurg · Pubmed #26495947.

ABSTRACT: OBJECTIVE: The ClearPoint real-time interventional MRI-guided methodology for deep brain stimulation (DBS) lead placement may offer advantages to frame-based approaches and allow accurate implantation under general anesthesia. In this study, the authors assessed the safety and efficacy of DBS in Parkinson's disease (PD) using this surgical method. METHODS: This was a prospective single-center study of bilateral DBS therapy in patients with advanced PD and motor fluctuations. Symptom severity was evaluated at baseline and 12 months postimplantation using the change in Unified Parkinson's Disease Rating Scale (UPDRS) Part III "off" medication score as the primary outcome variable. RESULTS: Twenty-six PD patients (15 men and 11 women) were enrolled from 2010 to 2013. Twenty patients were followed for 12 months (16 with a subthalamic nucleus target and 4 with an internal globus pallidus target). The mean UPDRS Part III "off" medication score improved from 40.75 ± 10.9 to 24.35 ± 8.8 (p = 0.001). "On" medication time without troublesome dyskinesia increased 5.2 ± 2.6 hours per day (p = 0.0002). UPDRS Parts II and IV, total UPDRS score, and dyskinesia rating scale "on" medication scores also significantly improved (p < 0.01). The mean levodopa equivalent daily dose decreased from 1072.5 ± 392 mg to 828.25 ± 492 mg (p = 0.046). No significant cognitive or mood declines were observed. A single brain penetration was used for placement of all leads, and the mean targeting error was 0.6 ± 0.3 mm. There were 3 serious adverse events (1 DBS hardware-related infection, 1 lead fracture, and 1 unrelated death). CONCLUSIONS: DBS leads placed using the ClearPoint interventional real-time MRI-guided method resulted in highly accurate lead placement and outcomes comparable to those seen with frame-based approaches.