Publications by authors named "Umit Ulas"

Objective: In obstructive sleep apnea syndrome (OSAS), any of the activated neural, vascular, hemodynamic, metabolic, inflammatory, and thrombotic mechanisms may be related to increased cerebrovascular disease and risk of death; however, the possible pathophysiological process between obstructive sleep apnea syndrome and stroke has not been clearly explained. We hypothesize that alterations in vasomotor reactivity in patients may be responsible for their altered cerebral blood flow, and may contribute to the increased risk of ischemic stroke.

Methods: A total of 30 untreated patients with severe obstructive sleep apnea and 26 control subjects were included in the study.

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Aim: The objective of our study was to investigate nerve conduction in normoglycemic obese children.

Methods: A total of 60 children with obesity (30 female and 30 male) and 30 healthy children (15 female and 15 male) were enrolled in the study. Insulin resistance (IR) and other metabolic disturbances were investigated and nerve conduction was measured in all participants.

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Purpose: To evaluate the changes in dynamic pupillometry in patients with idiopathic overactive bladder (OAB).

Methods: The study included 40 female patients with idiopathic OAB and 40 healthy female volunteers as a control group. Demographic and clinical data were recorded.

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Aims: The aim of our study is to investigate alterations in visual evoked potentials (VEP) and brainstem auditory evoked potentials (BAEP) in children with obesity.

Methods: A total of 96 children, with a mean age of 12.1±2.

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Migraine is a neurovascular disorder characterized by autonomic nervous system dysfunction and severe headache attacks. Studies have shown that changes in the intracranial vessels during migraine have an important role in the pathophysiology. Many studies have been conducted on the increased risk of stroke in patients with migraine, but insufficient data are available on the mechanism underlying the increase.

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Introduction: Cutaneous silent period (CSP) is an inhibitory spinal protective reflex and its afferents consist of A-delta nerve fibers. We aimed to evaluate patients with fibromyalgia (FM) and healthy controls to determine any differences between the groups in terms of CSP duration and latency, and if present, to determine whether there is any relationship with disease characteristics, psychological disorders and quality of life.

Materials And Methods: Thirty-two patients with FM and 32 healthy volunteers were included in the study.

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Background: Tension-type headache (TTH) is a primary headache disorder. In this study, the efficacy of local lidocaine application on anxiety and depression and its curative effect in patients with chronic TTH was investigated.

Methods: Forty-eight patients (24 local lidocaine injection, 24 local saline injection group) with chronic TTH were enrolled in our study.

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Background/aim: This study aimed to compare the cortical excitability of patients with generalized tonic-clonic seizures (GTCSs) and that of patients with psychogenic non-epileptic seizures (PNESs).

Methods: Patients were classified into groups according to their electroencephalogram (EEG) findings and seizure types: group 1 = GTCS with an abnormal EEG, group 2 = GTCS with a normal EEG and group 3 = PNES with a normal EEG. The control group included healthy volunteers with normal EEGs.

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Objective: Botulinum toxin type-A (BoNTA) has been considered a treatment option for CH. The aim of this study was to assess the effectiveness of BoNTA treatment in patients with medically resistant CH.

Materials And Methods: Forty patients with CH were included in the study.

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Objectives. To investigate the properties of the strength-duration time constant (SDTC) in multiple sclerosis (MS) patients. Methods.

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Aim: Peripheral nerve regeneration is often blocked by scar formation and misdirection of axon sprouts. The aim of this study is to evaluate electrophysiological and histopathological effects of low-dose radiation therapy on the prevention of intraneural scar formation in peripheral nerve injury.

Material And Methods: In this experimental study, twenty rats were randomly divided into two groups.

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Objectives: Both peripheral and central nociceptive mechanisms are responsible in chronic TTH. Analgegics are used in the acute treatment of chronic TTH and antidepressants are used in prophylactic treatment. However, further studies are needed to bring out new treatment options.

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A 22-year-old male had a meniscopathy operation using spinal anesthesia. After the operation, the patient reported a throbbing headache. His brain computed tomography (CT) showed subarachnoid hemorrhage (SAH) and hyperdense dural venous sinuses suspicious for thrombosis.

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The cyclic nature of some of headache disorders is closely related to melatonin, which is secreted by the pineal gland. We report a 29-year-old male patient with a 2.5-year history of headaches that woke him in the middle of the night.

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Objective: The aim of this study was to determine whether patients who faint earlier in the course of a tilt table study represent a separate population with a poorer prognosis or different pathophysiology. We analyzed differences across patients with different syncopal times on the tilt-table study to answer this question.

Methods: This was a retrospective, approved, chart review.

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Background/aims: We aimed to electrophysiologically evaluate the autonomic function in acromegalic patients using sympathetic skin response (SSR) as a reflection of the sympathetic sudomotor activity and RR interval variation (RRIV) as an indicator of the cardiovagal autonomic function.

Methods: The study group consisted of 18 male acromegalics, and the control group was composed of 18 age- and sex-matched healthy subjects. Participants underwent SSR and RRIV tests.

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A few cases of airplane headache (AH) have been reported in the literature. Treatment strategies of AHs are also controversial. We followed-up five patients with AH.

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Objective: To investigate alterations in P300 auditory event-related potentials in children with obesity to detect changes in cognitive functions.

Method: A total of 50 children with obesity and 23 age- and sex-matched healthy control subjects were included in the study. Laboratory tests were performed to detect dislipidemia and insulin resistance (IR).

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Objective: Corticosteroid injection into the carpal tunnel is frequently used for the treatment of carpal tunnel syndrome (CTS). Steroids are usually mixed with local anesthetics, which have positive effects that can aid the treatment of CTS by inhibiting the spontaneous discharge ability of excitable cells. The aim of this study was 3-fold: (1) to determine the efficacy of triamcinolone acetonide injection in the treatment of CTS, (2) to determine the efficacy of procaine hydrochloride (HCl) in the treatment of CTS, and (3) to compare the efficacy of triamcinolone acetonide and that of procaine HCl in the treatment of CTS.

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Painful diabetic neuropathy is one of the most common forms of neuropathic pain syndromes. Tumor necrosis factor alpha (TNF-alpha) is a proinflammatory cytokine that has been implicated as a key pain mediator in the development and maintenance of neuropathic pain conditions. Recent studies showed that endogenous TNF-alpha production was also accelerated in neural tissues and spinal cord under chronic hyperglycemia.

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