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Charles PD, Van Blercom N, Krack P, Lee SL, Xie J, Besson G, Benabid AL, Pollak P. Predictors of effective bilateral subthalamic nucleus stimulation for PD. Neurology 2002; 59:932-4. [PMID: 12297584 DOI: 10.1212/wnl.59.6.932] [Citation(s) in RCA: 189] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
To identify factors predictive of effective bilateral subthalamic nucleus (STN) stimulation for PD with severe motor complications, pre- and postoperative Unified PD Rating Scale (UPDRS) scores were analyzed in a series of 54 patients who received bilateral STN stimulation. Younger age and levodopa responsiveness predict a favorable response to bilateral STN stimulation. For individual PD symptoms, those that improve with a suprathreshold dose levodopa challenge are likely to improve with stimulation.
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Truong D, Duane DD, Jankovic J, Singer C, Seeberger LC, Comella CL, Lew MF, Rodnitzky RL, Danisi FO, Sutton JP, Charles PD, Hauser RA, Sheean GL. Efficacy and safety of botulinum type A toxin (Dysport) in cervical dystonia: results of the first US randomized, double-blind, placebo-controlled study. Mov Disord 2005; 20:783-91. [PMID: 15736159 DOI: 10.1002/mds.20403] [Citation(s) in RCA: 159] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Botulinum toxin type A (Dysport) has been shown in European studies to be a safe and effective treatment for cervical dystonia. This multicenter, double-blind, randomized, controlled trial assessed the safety and efficacy of Dysport in cervical dystonia patients in the United States. Eighty patients were randomly assigned to receive one treatment with Dysport (500 units) or placebo. Participants were followed up for 4 to 20 weeks, until they needed further treatment. They were assessed at baseline and weeks 2, 4, 8, 12, 16, and 20 after treatment. Dysport was significantly more efficacious than placebo at weeks 4, 8, and 12 as assessed by the Toronto Western Spasmodic Torticollis Rating Scale (10-point vs. 3.8-point reduction in total score, respectively, at week 4; P < or = 0.013). Of participants in the Dysport group, 38% showed positive treatment response, compared to 16% in the placebo group (95% confidence interval, 0.02-0.41). The median duration of response to Dysport was 18.5 weeks. Side effects were generally similar in the two treatment groups; only blurred vision and weakness occurred significantly more often with Dysport. No participants in the Dysport group converted from negative to positive antibodies after treatment. These results confirm previous reports that Dysport (500 units) is safe, effective, and well-tolerated in patients with cervical dystonia.
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Research Support, Non-U.S. Gov't |
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Hedera P, Phibbs FT, Dolhun R, Charles PD, Konrad PE, Neimat JS, Davis TL. Surgical targets for dystonic tremor: Considerations between the globus pallidus and ventral intermediate thalamic nucleus. Parkinsonism Relat Disord 2013; 19:684-6. [DOI: 10.1016/j.parkreldis.2013.03.010] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Revised: 02/24/2013] [Accepted: 03/11/2013] [Indexed: 11/28/2022]
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Newman WJ, Davis TL, Padaliya BB, Padaliya BB, Covington CD, Gill CE, Abramovitch AI, Charles PD. Botulinum toxin type A therapy during pregnancy. Mov Disord 2004; 19:1384-5. [PMID: 15389988 DOI: 10.1002/mds.20205] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Injection with botulinum toxin type A (Botox) is a safe and efficacious treatment for idiopathic cervical dystonia. We present the first case report of clinical Botox treatment during pregnancy. This patient underwent four apparently uncomplicated full-term pregnancies while receiving regular Botox treatments.
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Remple MS, Bradenham CH, Kao CC, Charles PD, Neimat JS, Konrad PE. Subthalamic nucleus neuronal firing rate increases with Parkinson's disease progression. Mov Disord 2011; 26:1657-62. [PMID: 21542021 DOI: 10.1002/mds.23708] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 02/10/2011] [Accepted: 02/15/2011] [Indexed: 12/25/2022] Open
Abstract
Parkinson's disease is a neurodegenerative disorder characterized by progressive loss of dopaminergic cells in the central nervous system, in particular the substantia nigra, resulting in an unrelenting loss of motor and nonmotor function. Animal models of Parkinson's disease reveal hyperactive neurons in the subthalamic nucleus that have increased firing rates and bursting activity compared with controls. Although subthalamic nucleus activity has been characterized in patients with advanced-stage Parkinson's disease, it has not been described in patients with early-stage Parkinson's disease. Here we present the results of subthalamic nucleus neuronal recordings from patients with early-stage Parkinson's disease (Hoehn and Yahr stage II) enrolled in an ongoing clinical trial compared with recordings from age- and sex-matched patients with advanced Parkinson's disease. Subthalamic nucleus neurons had a significantly lower firing rate in early versus advanced Parkinson's disease (28.7 vs 36.3 Hz; P<.01). The overall activity of the subthalamic nucleus was also significantly lower in early versus late Parkinson's disease, as measured by background neuronal noise (12.4 vs 14.0 mV; P<.05). No significant difference was identified between groups in the bursting or variability of neuronal firing in the subthalamic nucleus, as measured by a burst index or the interspike interval coefficient of variability. The results suggest that neuronal firing in the subthalamic nucleus increases with Parkinson's disease progression.
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Research Support, Non-U.S. Gov't |
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Chapman MA, Barron R, Tanis DC, Gill CE, Charles PD. Comparison of botulinum neurotoxin preparations for the treatment of cervical dystonia. Clin Ther 2007; 29:1325-37. [PMID: 17825685 DOI: 10.1016/j.clinthera.2007.07.020] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/24/2007] [Indexed: 11/28/2022]
Abstract
BACKGROUND Comparative studies of botulinum neurotoxin preparations to date have generally examined 2 preparations at prespecified dose ratios in relatively homogeneous groups of patients under controlled study conditions. It is unclear whether the differences in adverse-event rates that have been noted under these controlled conditions can be generalized to the broader population of cervical dystonia patients, who are treated with a wider range of doses in a variety of settings. OBJECTIVE We conducted a systematic review and analysis of the published literature to compare rates of dysphagia and dry mouth in studies of botulinum neurotoxin products. METHODS We searched the MEDLINE, EMBASE, Biosis, SciSearch, JICST (Japan Science and Technology Center), and Pascal databases from 1985 through 2006 using the terms cervical dystonia, spasmodic torticollis, and botulinum toxin for original English-language studies of Botox, Dysport, or Myobloc in the treatment of cervical dystonia (or spasmodic torticollis) that documented adverse events by treatment or patient. Studies that involved patients with various types of dystonias or movement disorders were included as long as adverse events were reported separately for those with cervical dystonia. Rates of dysphagia with the original preparation of Botox were considered separately from those with the current preparation of Botox. RESULTS Seventy published articles were included in the analysis (30 Botox, 24 Dysport, 3 Botox + Dysport, 11 Myobloc, 2 Botox + Myobloc). Mean total doses per treatment ranged from 60 to 374 U for Botox, 125 to 1200 U for Dysport, and 579 to 19,853 U for Myobloc. Botox was associated with a significantly lower rate of dysphagia than Dysport, with mean dysphagia rates of 10.5% for original Botox, 8.9% for current Botox, and 26.8% for Dysport (both, P < 0.05). Myobloc was associated with dry mouth (3.2%-90.0%) in 9 of 13 studies, but this adverse event was not reported in a sufficient number of studies of botulinum toxin type A preparations (Botox, n = 2; Dysport, n = 6) to permit statistical comparison. In the weighted analysis, the duration of effect differed between botulinum neurotoxin products (current Botox > Myobloc > original Botox > Dysport; all, P < 0.001), but only 43 (61.4%) of the 70 studies reported duration, and the definitions varied. CONCLUSION The results of this analysis indicate differences in adverse-event rates between botulinum neurotoxin preparations, suggesting that use of these products should be based on their individual dosing, efficacy, and safety profiles.
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Systematic Review |
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Charles PD, Davis TL, Shannon KM, Hook MA, Warner JS. Tongue protrusion dystonia: treatment with botulinum toxin. South Med J 1997; 90:522-5. [PMID: 9160072 DOI: 10.1097/00007611-199705000-00012] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We report the treatment experience in a series of patients with involuntary tongue protrusion resulting from oromandibular dystonia (OMD) or Meige's syndrome. A retrospective analysis of clinical findings and results of treatment was conducted on patients treated at Vanderbilt University Medical Center between 1989 and 1995. After unsuccessful treatment with conventional oral medications, nine patients having involuntary tongue protrusion resulting from OMD or Meige's syndrome were treated with botulinum toxin type A (BTX-A) injected into the genioglossus muscle at four sites via a submandibular approach. A marked reduction in tongue protrusion was achieved in six patients (67%). Of 35 consecutive injections, 83% were successful at reducing tongue protrusion. Mild dysphagia complicated 14% of the injections. The average dose injected was 34 (+/- 3) units producing a 15 (+/- 2) week average duration of effect. Injection of the genioglossus with BTX-A may prove to be a valid treatment option for involuntary tongue protrusion related to OMD or Meige's syndrome. A double-blind, placebo-controlled trial is needed to better define efficacy and adverse events.
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Case Reports |
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Charles PD, Dolhun RM, Gill CE, Davis TL, Bliton MJ, Tramontana MG, Salomon RM, Wang L, Hedera P, Phibbs FT, Neimat JS, Konrad PE. Deep brain stimulation in early Parkinson's disease: enrollment experience from a pilot trial. Parkinsonism Relat Disord 2011; 18:268-73. [PMID: 22104012 DOI: 10.1016/j.parkreldis.2011.11.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Revised: 10/25/2011] [Accepted: 11/01/2011] [Indexed: 11/18/2022]
Abstract
BACKGROUND Deep brain stimulation (DBS) of the subthalamic nucleus is an accepted therapy for advanced Parkinson's disease (PD). In animal models, pharmacologic ablation and stimulation of the subthalamic nucleus have resulted in clinical improvement and, in some cases, improved survival of dopaminergic neurons. DBS has not been studied in the early stages of PD, but early application should be explored to evaluate safety, efficacy, and the potential to alter disease progression. METHODS We are conducting a prospective, randomized, single-blind clinical trial of optimal drug therapy (ODT) compared to medication plus DBS (ODT + DBS) in subjects with Hoehn & Yahr Stage II idiopathic PD who are without motor fluctuations or dementia. We report here subject screening, enrollment, baseline characteristics, and adverse events. RESULTS 30 subjects (average age 60 ± 6.9 years, average duration of medicine 2.1 ± 1.3 years, average UPDRS-III scores 14.9 on medication and 27.0 off medication) are enrolled in the ongoing study. Twelve of 15 subjects randomized to DBS experienced perioperative adverse events, the majority of which were related to the procedure or device and resolved without sequelae. Frequently reported adverse events included wound healing problems, headache, edema, and confusion. CONCLUSION This report demonstrates that subjects with early stage PD can be successfully recruited, consented and retained in a long-term clinical trial of DBS. Our ongoing pilot investigation will provide important preliminary safety and tolerability data concerning the application of DBS in early stage PD.
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Research Support, Non-U.S. Gov't |
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Hedera P, Phibbs FT, Fang JY, Cooper MK, Charles PD, Davis TL. Clustering of dystonia in some pedigrees with autosomal dominant essential tremor suggests the existence of a distinct subtype of essential tremor. BMC Neurol 2010; 10:66. [PMID: 20670416 PMCID: PMC2918572 DOI: 10.1186/1471-2377-10-66] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Accepted: 07/29/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND There is an ongoing debate whether essential tremor (ET) represents a monosymptomatic disorder or other neurologic symptoms are compatible with the diagnosis of ET. Many patients with clinically definite ET develop dystonia. It remains unknown whether tremor associated with dystonia represent a subtype of ET. We hypothesized that ET with dystonia represents a distinct subtype of ET. METHODS We studied patients diagnosed with familial ET and dystonia. We included only those patients whose first-degree relatives met diagnostic criteria for ET or dystonia with tremor. This cohort was ascertained for the presence of focal, segmental, multifocal, hemidystonia or generalized dystonia, and ET. RESULTS We included 463 patients from 97 kindreds with autosomal dominant mode of inheritance (AD), defined by the vertical transmission of the disease. ET was the predominant phenotype in every ascertained family and each was phenotypically classified as AD ET. "Pure" ET was present in 365 individuals. Focal or segmental dystonia was present in 98 of the 463 patients; 87 of the 98 patients had ET associated with dystonia, one had dystonic tremor and ten had isolated dystonia. The age of onset and tremor severity did not differ between patients with "pure" ET and ET associated with dystonia. We did not observe a random distribution of dystonia in AD ET pedigrees and all patients with dystonia associated with ET were clustered in 28% of all included pedigrees (27/97, p < 0.001). CONCLUSIONS Our results suggest that familial ET associated with dystonia may represent a distinct subtype of ET.
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Research Support, N.I.H., Extramural |
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Kahn E, D'Haese PF, Dawant B, Allen L, Kao C, Charles PD, Konrad P. Deep brain stimulation in early stage Parkinson's disease: operative experience from a prospective randomised clinical trial. J Neurol Neurosurg Psychiatry 2012; 83:164-70. [PMID: 21890575 PMCID: PMC3733009 DOI: 10.1136/jnnp-2011-300008] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Recent evidence suggests that deep brain stimulation of the subthalamic nucleus (STN-DBS) may have a disease modifying effect in early Parkinson's disease (PD). A randomised, prospective study is underway to determine whether STN-DBS in early PD is safe and tolerable. OBJECTIVES/METHODS 15 of 30 early PD patients were randomised to receive STN-DBS implants in an institutional review board approved protocol. Operative technique, location of DBS leads and perioperative adverse events are reported. Active contact used for stimulation in these patients was compared with 47 advanced PD patients undergoing an identical procedure by the same surgeon. RESULTS 14 of the 15 patients did not sustain any long term (>3 months) complications from the surgery. One subject suffered a stroke resulting in mild cognitive changes and slight right arm and face weakness. The average optimal contact used in symptomatic treatment of early PD patients was: anterior -1.1±1.7 mm, lateral 10.7±1.7 mm and superior -3.3±2.5 mm (anterior and posterior commissure coordinates). This location is statistically no different (0.77 mm, p>0.05) than the optimal contact used in the treatment of 47 advanced PD patients. CONCLUSIONS The perioperative adverse events in this trial of subjects with early stage PD are comparable with those reported for STN-DBS in advanced PD. The active contact position used in early PD is not significantly different from that used in late stage disease. This is the first report of the operative experience from a randomised, surgical versus best medical therapy trial for the early treatment of PD.
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Randomized Controlled Trial |
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Charles PD, Gill CE, Davis TL, Konrad PE, Benabid AL. Is deep brain stimulation neuroprotective if applied early in the course of PD? ACTA ACUST UNITED AC 2008; 4:424-6. [PMID: 18594505 DOI: 10.1038/ncpneuro0848] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2008] [Accepted: 05/19/2008] [Indexed: 11/09/2022]
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Review |
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Charles PD, Abou-Khalil R, Abou-Khalil B, Wertz RT, Ashmead DH, Welch L, Kirshner HS. MRI asymmetries and language dominance. Neurology 1994; 44:2050-4. [PMID: 7969958 DOI: 10.1212/wnl.44.11.2050] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVE To examine the relationship between language dominance, as measured by Wada testing, and hemispheric asymmetries on MR brain images. BACKGROUND A previous report that did not include verification of language dominance compared the length of the planum temporale with hemispheric asymmetries seen on CT and inferred that occipital lobe asymmetry is related to language dominance. METHODS Language dominance was identified by the Wada test in 57 patients evaluated for surgical treatment of epilepsy. Fifty-five had an MRI scan that allowed accurate measurement. In a blinded fashion, two examiners independently measured bilateral frontal, parietal, and occipital lobe lengths on MR scan for each patient. Measurements of asymmetries were compared with language dominance established by the Wada test. RESULTS Reliability of measurement between the examiners was 97%. Asymmetry of the occipital lobe length on MR scan 10 mm above the tentorium was the only measurement significantly related to language dominance (p < 0.01). Occipital lobe length was longer on the left in 19 (40%) and on the right in 10 (21%) patients with left dominance. The right lobe was longer in six of seven (86%) patients with bilateral dominance. One patient with right hemisphere dominance had a longer left lobe. None of the measurements significantly related to handedness. CONCLUSION Asymmetries of occipital lobe length relate to language dominance, but such dominance cannot be reliably identified by MR in an individual patient.
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Abstract
PURPOSE Clinical experience with botulinum toxin type A for non-cosmetic uses that are approved by the Food and Drug Administration (FDA) and various other non-cosmetic uses that are not approved by FDA, including some applications that are widely known and others that currently are emerging, is discussed. SUMMARY FDA-approved indications for botulinum toxin type A (Botox) include the temporary treatment of cervical dystonia (a neuromuscular disorder involving the head and neck), the oculomotor disorders strabismus (improperly aligned eyes) and blepharospasm (involuntary contraction of the eye muscles), and severe primary axillary hyperhidrosis (excessive sweating). Other uses of botulinum toxin type A that are widely known but not approved by FDA include spastic disorders associated with injury or disease of the central nervous system including trauma, stroke, multiple sclerosis, or cerebral palsy and focal dystonias affecting the limbs, face, jaw, or vocal cords. Treatment and prevention of chronic headache and chronic musculoskeletal pain are emerging uses for botulinum toxin type A. CONCLUSION Many of the conditions for which botulinum toxin type A has been explored are common and difficult to treat. Temporary improvement in symptoms is associated with botulinum toxin type A injection, and repeat treatment often is required. The drug is well tolerated and has a wide margin of safety.
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Review |
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Charles PD, Scherokman B, Jozefowicz RF. How much neurology should a medical student learn? a position statement of the AAN Undergraduate Education Subcommittee. ACADEMIC MEDICINE : JOURNAL OF THE ASSOCIATION OF AMERICAN MEDICAL COLLEGES 1999; 74:23-6. [PMID: 9934290 DOI: 10.1097/00001888-199901000-00012] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Neurologic disease, already common in the United States, will become even more common in the future. But presently, neurology education at the undergraduate level and in primary care residencies is declining and does not adequately train physicians to manage neurologic illness. The authors maintain that this serious problem can be partially addressed by improving the neurology education of all primary care physicians and by allowing students access to neurology specialists. The education of medical students in the basic and clinical neurosciences must be integrated into a seamless curriculum over the four years of medical education. This education experience must be taught through a team approach and must be led by both a clinician and a basic scientist. All medical students must acquire the knowledge, skills, and attitudes necessary to perform an initial evaluation of the patient with a neurologic complaint. Finally, students must understand the role and recognize the importance of the neurologist and know when consultation is needed. This continuum of neurology education must be financially supported by the institution, and course leaders who show excellence in education must be rewarded with compensation and promotion.
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Charles PD, Padaliya BB, Newman WJ, Gill CE, Covington CD, Fang JY, So SA, Tramontana MG, Konrad PE, Davis TL. Deep brain stimulation of the subthalamic nucleus reduces antiparkinsonian medication costs. Parkinsonism Relat Disord 2004; 10:475-9. [PMID: 15542007 DOI: 10.1016/j.parkreldis.2004.05.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2004] [Revised: 05/15/2004] [Accepted: 05/20/2004] [Indexed: 12/01/2022]
Abstract
This study reports a retrospective analysis of 16 patients to determine changes in medication costs associated with deep brain stimulation of the bilateral subthalamic nucleus (DBS B-STN). Antiparkinsonian medication (APMED) costs were evaluated pre- and post-operatively at 1 and 2 years, based on prescribed dosages. After treatment with DBS, patients experienced a 32% reduction in APMED costs after 1 year and a 39% reduction after 2 years. Hypothetical projections of total potential savings are presented, accounting for increasingly complex medication regimens and medication cost inflation. DBS patients may experience a significant long-term reduction in the cost of their pharmacologic treatment.
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Atkinson DS, Abou-Khalil B, Charles PD, Welch L. Midsagittal corpus callosum area, intelligence, and language dominance in epilepsy. J Neuroimaging 1996; 6:235-9. [PMID: 8903076 DOI: 10.1111/jon199664235] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Alterations in midsagittal corpus callosum (CC) area and morphology have been suggested in several disease processes of the nervous system. In addition, some studies found a relation of CC area to handedness, language dominance, and gender. The relation of CC area to measures of intelligence and memory and the effect of epilepsy on CC area have received less attention. In this study CC area was measured on midsagittal magnetic resonance images in 48 patients undergoing presurgical evaluation of epilepsy and in 20 control subjects. All patients had the Wada test and formal neuropsychological testing. The mean CC area of the epilepsy group was significantly smaller than that of control subjects (p < 0.00001). CC area showed a positive correlation with presurgical performance IQ (p = 0.008) and full-scale IQ (p = 0.048), but not with memory scores or language dominance. There was no relation of CC area to location of epileptic focus, seizure types, age at onset, epilepsy duration, or etiology. The presence of an atrophic lesion was associated with a smaller CC area. The correlation of total CC area with performance and full-scale IQs may reflect axonal loss in patients with a low IQ resulting from the etiology of epilepsy or the epilepsy itself.
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Phillips L, Litcofsky KA, Pelster M, Gelfand M, Ullman MT, Charles PD. Subthalamic nucleus deep brain stimulation impacts language in early Parkinson's disease. PLoS One 2012; 7:e42829. [PMID: 22880117 PMCID: PMC3413674 DOI: 10.1371/journal.pone.0042829] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Accepted: 07/13/2012] [Indexed: 11/25/2022] Open
Abstract
Although deep brain stimulation (DBS) of the basal ganglia improves motor outcomes in Parkinson's disease (PD), its effects on cognition, including language, remain unclear. This study examined the impact of subthalamic nucleus (STN) DBS on two fundamental capacities of language, grammatical and lexical functions. These functions were tested with the production of regular and irregular past-tenses, which contrast aspects of grammatical (regulars) and lexical (irregulars) processing while controlling for multiple potentially confounding factors. Aspects of the motor system were tested by contrasting the naming of manipulated (motor) and non-manipulated (non-motor) objects. Performance was compared between healthy controls and early-stage PD patients treated with either DBS/medications or medications alone. Patients were assessed on and off treatment, with controls following a parallel testing schedule. STN-DBS improved naming of manipulated (motor) but not non-manipulated (non-motor) objects, as compared to both controls and patients with just medications, who did not differ from each other across assessment sessions. In contrast, STN-DBS led to worse performance at regulars (grammar) but not irregulars (lexicon), as compared to the other two subject groups, who again did not differ. The results suggest that STN-DBS negatively impacts language in early PD, but may be specific in depressing aspects of grammatical and not lexical processing. The finding that STN-DBS affects both motor and grammar (but not lexical) functions strengthens the view that both depend on basal ganglia circuitry, although the mechanisms for its differential impact on the two (improved motor, impaired grammar) remain to be elucidated.
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Research Support, Non-U.S. Gov't |
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Jankovic J, Adler CH, Charles PD, Comella C, Stacy M, Schwartz M, Sutch SM, Brin MF, Papapetropoulos S. Rationale and design of a prospective study: Cervical Dystonia Patient Registry for Observation of OnaBotulinumtoxinA Efficacy (CD PROBE). BMC Neurol 2011; 11:140. [PMID: 22054223 PMCID: PMC3220636 DOI: 10.1186/1471-2377-11-140] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 11/04/2011] [Indexed: 12/31/2022] Open
Abstract
Background A registry of patients with cervical dystonia (Cervical Dystonia Patient Registry for Observation of onaBotulinumtoxinA Efficacy [CD PROBE]) was initiated to capture data regarding physician practices and patient outcomes with onabotulinumtoxinA (BOTOX®, Allergan, Inc., Irvine, CA, USA). Methods and baseline demographics from an interim analysis are provided. Methods/Design This is a prospective, multicenter, clinical registry in the United States enrolling subjects with cervical dystonia (CD) who are toxin naïve and/or new to the physicians' practices, or who had been in a clinical trial but received their last injection ≥ 16 weeks prior to enrollment. Subjects are followed over 3 injection cycles of onabotulinumtoxinA, with assessments at time of injection and 4-6 weeks later. Information on physician's practice, patient demographics, CD disease history, duration of treatment intervals and neurotoxin dose, dilution, use of electromyography, and muscles injected are collected. Outcomes are assessed by physicians and subjects using various questionnaires. Discussion This ongoing registry includes 609 subjects with the following baseline data: 75.9% female, 93.6% Caucasian, mean age 57.6 ± 14.3, age at symptom onset 48.3 ± 16.2, and time to diagnosis 5.4 ± 8.6 years, with an additional 1.0 ± 3.5 years before treatment. Of those employed at the time of diagnosis, 36.6% stopped working as a result of CD. CD PROBE, the largest clinical registry of CD treatment, will provide useful data on current treatment practices with onabotulinumtoxinA, potentially leading to refinements for optimization of outcomes. Trial registration NCT00836017
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Research Support, Non-U.S. Gov't |
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Roberts AG, Graves CR, Konrad PE, Groomes TE, Pfister AA, Damian MM, Charles PD. Intrathecal baclofen pump implantation during pregnancy. Neurology 2003; 61:1156-7. [PMID: 14581694 DOI: 10.1212/01.wnl.0000086806.65430.40] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Pfister AA, Roberts AG, Taylor HM, Noel-Spaudling S, Damian MM, Charles PD. Spasticity in adults living in a developmental center. Arch Phys Med Rehabil 2004; 84:1808-12. [PMID: 14669188 DOI: 10.1016/s0003-9993(03)00368-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To ascertain the prevalence of spasticity among adults living in a developmental center and to document the development of spasticity treatment plans for this population. DESIGN Descriptions of the clinical features of medical disorders and a prevalence survey. SETTING Residential developmental center. PARTICIPANTS One hundred three adults. INTERVENTIONS Not applicable. MAIN OUTCOME MEASURES Characteristics described included the prevalence of spasticity in this population, the specific spasticity diagnosis, functional goals for spasticity treatment identified by the participants' multidisciplinary teams, and the specific treatment indicated by the neurologist. RESULTS Of the 103 people diagnosed by the neurologist, 24 had diplegic spasticity, 4 had hemiplegic spasticity, 44 had quadriplegic spasticity, and 31 had no spasticity. Functional goals identified by multidisciplinary teams were undergarment change (46.3% of the persons for whom goals were identified), splinting hands (11%), dressing (57.4%), hygiene (20.4%), wheelchair positioning (25.9%), ambulation improvement (14.8%), and transfers (9.3%). After physical and occupational therapy, the first invasive treatments indicated for people with spasticity included botulinum toxin injections (60%), intrathecal baclofen (26.4%), orthopedic surgery (5.6%), and medication (1.4%). No treatment was recommended for 25% of the spasticity patients. CONCLUSIONS The prevalence of spasticity was 35% in this developmental center population of 205 individuals. A multidisciplinary team approach to the evaluation of adults with spasticity who live in a developmental center makes it possible to identify functional goals that are amenable to spasticity treatment and minimizes treatment that does not target specific functional goals.
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Research Support, Non-U.S. Gov't |
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Hedera P, Davis TL, Phibbs FT, Charles PD, LeDoux MS. FUS in familial essential tremor – The search for common causes is still on. Parkinsonism Relat Disord 2013; 19:818-20. [DOI: 10.1016/j.parkreldis.2013.04.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 04/04/2013] [Accepted: 04/08/2013] [Indexed: 11/17/2022]
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Charles PD, Manack Adams A, Davis T, Bradley K, Schwartz M, Brin MF, Patel AT. Neck Pain and Cervical Dystonia: Treatment Outcomes from CD PROBE (Cervical Dystonia Patient Registry for Observation of OnabotulinumtoxinA Efficacy). Pain Pract 2016; 16:1073-1082. [PMID: 26910788 DOI: 10.1111/papr.12408] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Accepted: 09/05/2015] [Indexed: 11/29/2022]
Abstract
BACKGROUND Pain is a prevailing feature of cervical dystonia (CD), the most common form of focal dystonia. This analysis examined pain relief after onabotulinumtoxinA treatment in CD subjects with moderate/severe pain from the Cervical Dystonia Patient Registry for Observation of OnabotulinumtoxinA Efficacy (CD PROBE). METHODS CD PROBE was a prospective, multicenter, observational registry of CD subjects who were naïve to botulinum toxin (BoNT), new to physician, or had not received BoNT within ≥ 16 weeks if in a clinical trial. Subjects were eligible for 3 treatments, with variable session intervals. Descriptive and inferential statistics were utilized to evaluate the change in pain scores in the population with moderate/severe neck pain at baseline (Pain Numeric Rating Scale [PNRS] score 4 to 10). RESULTS Of 1046 enrolled, 733 (70.7%) had moderate/severe neck pain at baseline. Postinjection pain questionnaire responses 4 to 6 weeks after each of the 3 treatments revealed that a majority of subjects (67.1%, 72.4%, and 76.4%) reported pain relief; mean time to pain relief was 7.1, 7.4, and 7.6 days. All pain scales showed significant improvements from baseline to final visit (all P < 0.0001): PNRS, mean 6.6 to 3.8; CD Impact Profile-58 Pain and Discomfort subscale, mean 78.7 to 56.5; and Toronto Western Spasmodic Torticollis Rating Scale Pain subscale, mean 12.6 to 8.5. Multivariable regression models showed that initial pain score significantly contributed to the final pain score for all scales. CONCLUSION Results from this real-world clinical registry indicate that a majority of CD subjects with moderate/severe neck pain experience significant relief following onabotulinumtoxinA treatment.
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Abstract
A child suffered bilateral thalamic infarction secondary to Sneddon and antiphospholipid antibody syndromes. Her initial findings of hypersomnolence, mood disturbance, and amnesia are characteristic of bilateral thalamic infarction. Clinical and laboratory evaluation confirmed the diagnosis of both Sneddon and antiphospholipid antibody syndromes as the cause of her unusual stroke. The treatment of this patient, based on experience with adult patients, was long-term, high-intensity warfarin anticoagulation.
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Case Reports |
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Hedera P, Fang JY, Phibbs F, Cooper MK, Charles PD, Davis TL. Positive family history of essential tremor influences the motor phenotype of Parkinson's disease. Mov Disord 2010; 24:2285-8. [PMID: 19795470 DOI: 10.1002/mds.22772] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Previous reports have suggested that essential tremor (ET) represents a risk factor for the development of Parkinson's disease (PD). Patients with long-standing ET who develop PD tend to have a tremor-dominant subtype. To further clarify this association, we examined patients from kindreds with autosomal dominant ET who had signs of isolated PD but did not meet criteria for overlapping ET. We identified 22 patients with PD meeting these diagnostic criteria, and 90% (20 of 22) had tremor-predominant subtype of PD. Unilateral rest tremor was the presenting symptom in 15 of 22 patients, bradykinesia or rigidity in 5 of 22, and gait problems in 2 of 22. Postural tremor was relatively mild, and the severity of kinetic tremor tightly correlated with rest tremor (r = 0.83, P < 0.001). Tremor-dominant subtype of PD in patients with a positive family history of ET suggests that these patients have inherited a genetic susceptibility factor for tremor, which affects the motor phenotype of PD.
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Journal Article |
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Tielbur BR, Rice Cella DE, Currie A, Roach JD, Mattingly B, Boone J, Watwood C, McGauran A, Kirshner HS, Charles PD. Discharge huddle outfitted with mobile technology improves efficiency of transitioning stroke patients into follow-up care. Am J Med Qual 2013; 30:36-44. [PMID: 24316727 DOI: 10.1177/1062860613510964] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Disjointed patient care is a well-documented problem in health care systems, often stemming from poor communication between providers, services, and follow-up care resources. A multidisciplinary discharge huddle, augmented with cellular and tablet technology, was implemented on the Neurology Stroke Service to facilitate multidisciplinary communication, improve transition of patients, and increase referrals into affiliated follow-up care. After initiating the huddle, patient length of stay decreased by 1.4 days (25%), patient flow into continuum partners increased by 10%, and the number of patients going without services after their hospital stay decreased by more than 12%. Huddle members reported that the technology was helpful, heavily utilized, and made their work more efficient. This pilot suggests that utilizing modern mobile technologies can help improve efficiency and referrals within the health care system and reduce patient length of stay.
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