The factors affecting the prolonged PCR positivity in COVID-19 patients.

Objectives: The aim of this study is to investigate the effects of factors such as age, gender, comorbid diseases and treatments applied on the positive duration of the PCR test in COVID-19 patients.

Background: The duration of PCR positivity in COVID-19 patients varies. Studies in the literature investigating factors that may affect this duration are limited.

Reliability and Validity of the Turkish Short-Form McGill Pain Questionnaire-2 (TR-SF-MPQ-2) in patients with chronic low back pain.

Objectives: The aim of this study was to assess validity and reliability of the Turkish version of the expanded and revised version of the Short-Form McGill Pain Questionnaire (TR-SF-MPQ-2) in patients with chronic low back pain (CLBP) and to investigate the relationship between TR-SF-MPQ-2 and etiology, pain scales, and disability index.

Patients And Methods: Between October 2014 and December 2014, a total of 194 patients with CLBP (66 males, 128 females; mean age 50±14.3 years; range, 35 to 65 years) attending to our outpatient clinic were included.

Peri-Infarct Hot-Zones Have Higher Susceptibility to Optogenetic Functional Activation-Induced Spreading Depolarizations.

Background And Purpose: Spreading depolarizations (SDs) are recurrent and ostensibly spontaneous depolarization waves that may contribute to infarct progression after stroke. Somatosensory activation of the metastable peri-infarct tissue triggers peri-infarct SDs at a high rate.

Methods: We directly measured the functional activation threshold to trigger SDs in peri-infarct hot zones using optogenetic stimulation after distal middle cerebral artery occlusion in Thy1-ChR2-YFP mice.