Long-lasting TMS motor threshold elevation in mild traumatic brain injury
Acta Neurologica Scandinavica,  Clinical Article

Tallus J et al. – The results show chronic MT elevation in a sample of subjects with symptomatic or recovered Mild traumatic brain injury (mTBI). This suggests that mTBI may be compensated, although not fully recovered, years after the injury. While the cause for motor threshold (MT) elevation cannot be concluded from these preliminary observations, possible explanations include decreased cortical excitability and impaired subcortical conduction.

Methods
  • Mild traumatic brain injury (mTBI) is very common, and part of the patients experience persistent symptoms.
  • These may be caused by diffuse neuronal damage and could therefore affect cortical excitability.
  • The motor threshold (MT), measured by transcranial magnetic stimulation (TMS), is a measure of cortical excitability and cortico-spinal tract integrity.
  • The authors used navigated TMS (nTMS) and electromyography to determine subjects’ left hemisphere MTs.
  • Nineteen subjects with mTBI (11 with persistent symptoms and eight fully recovered) and nine healthy controls were tested.
  • The injuries had occurred on average 5 years earlier.
  • All participants had normal brain MRIs, that is, no signs of injury.
  • None used centrally acting medication.

Results
  • The mean MT in controls was 43.0% (SD 2.5) of maximum stimulator output.
  • The mTBI subjects mean MT was 53.4% (SD 9.7), being higher than the controls’ threshold.
  • Subjective recovery did not correlate with MT.

Please login or register to follow this author.
► Click here to access PubMed, Publisher and related articles...
<< Previous Article | Next Article >>

Your Unread Messages in Physician Assistant

See All >> Messages include industry-sponsored communications and special communications from MDLinx

Most Popular Physician Assistant Articles

1 Dance for Parkinson's: A new framework for research on its physical, mental, emotional, and social benefits Complementary Therapies in Medicine, June 17, 2014    Review Article

2 Statins in the elderly: an answered question Current Opinion in Cardiology, June 9, 2014    Evidence Based Medicine    Review Article    Clinical Article

3 Efficacy of high-dose versus standard-dose influenza vaccine in older adults New England Journal of Medicine, August 15, 2014    Evidence Based Medicine    Clinical Article

4 Hepatitis a hospitalizations in the United States, 2002 – 2011 Hepatology, October 3, 2014    Clinical Article

5 A statin a day to keep the doctor away? comparing aspirin and statins for primary prevention of cardiovascular disease Annals of Pharmacotherapy, August 7, 2014    Clinical Article

6 Vitamin D and mortality: meta-analysis of individual participant data from a large consortium of cohort studies from Europe and the United States BMJ, June 24, 2014    Evidence Based Medicine    Clinical Article

7 Consumption of nuts and legumes and risk of stroke: a meta-analysis of prospective cohort studies Nutrition, Metabolism & Cardiovascular Diseases, July 25, 2014    Evidence Based Medicine    Clinical Article

8 Hemoglobin A1c levels and risk of severe hypoglycemia in children and young adults with type 1 diabetes from Germany and Austria: a trend analysis in a cohort of 37,539 patients between 1995 and 2012 Full Text PLoS Medicine, October 10, 2014    Free full text    Evidence Based Medicine    Clinical Article

9 Effects of decontamination of the oropharynx and intestinal tract on antibiotic resistance in ICUs: a randomized clinical trial JAMA, October 10, 2014    Evidence Based Medicine    Clinical Article

10 The effectiveness of metoprolol versus atenolol on prevention of all-cause and cardiovascular mortality in a large Chinese population: A cohort study International Journal of Cardiology, June 27, 2014    Clinical Article

11 Vitamin E and C supplementation and risk of cancer in men: posttrial follow-up in the Physicians’ Health Study II randomized trial American Journal of Clinical Nutrition, July 10, 2014    Clinical Article

12 The effect of indapamide versus hydrochlorothiazide on ventricular and arterial function in patients with hypertension and diabetes: Results of a randomized trial American Heart Journal, October 3, 2014    Clinical Article

13 Meta-analysis of non-steroidal anti-inflammatory drug use and risk of atrial fibrillation The American Journal of Cardiology, October 3, 2014    Evidence Based Medicine    Review Article    Clinical Article

14 Switching from allopurinol to febuxostat for the treatment of hyperuricemia and renal function in patients with chronic kidney disease Clinical Rheumatology, October 10, 2014    Clinical Article

15 Calcium channel blocker compared with angiotensin receptor blocker for patients with hypertension: a meta-analysis of randomized controlled trials The Journal of Clinical Hypertension, August 13, 2014    Evidence Based Medicine    Review Article    Clinical Article

16 Cardiac dysfunction associated with a nucleotide polymerase inhibitor for treatment of hepatitis C Hepatology, October 3, 2014    Clinical Article

17 Randomized trial of vitamin D supplementation for winter-related atopic dermatitis in children The Journal of Allergy and Clinical Immunology, October 10, 2014    Clinical Article

18 The management of cirrhosis in women Alimentary Pharmacology and Therapeutics, October 10, 2014    Review Article

19 Randomized comparison of gemcitabine, dexamethasone, and cisplatin versus dexamethasone, cytarabine, and cisplatin chemotherapy before autologous stem-cell transplantation for relapsed and refractory aggressive lymphomas: NCIC-CTG LY.12 Journal of Clinical Oncology, October 17, 2014    Clinical Article

20 Management of high-grade gliomas in the elderly Seminars in Radiation Oncology, October 3, 2014    Clinical Article

Indexed Journals in Physician Assistant: Advance for Physicians Assistants, American Family Physicianmore