Search results for "peripheral nerves"
showing 10 items of 31 documents
The Laparoscopic Approach to Control Intractable Pelvic Neuralgia: From Laparoscopic Pelvic Neurosurgery to the LION Procedure
2007
OBJECTIVE: To present different aspects and advantages of the laparoscopic approach to the pelvic nerves aimed at treating intractable pelvic neuralgia. METHODS: We report on a nonconsecutive series of 7 patients with different types and etiologies of chronic pelvic neuralgia, all of whom underwent laparoscopy. In all 7 cases, the neuralgia was refractory to medical management and had profound socioeconomic consequences for the patients. RESULTS: Techniques of laparoscopic transperitoneal neurolysis of several pelvic somatic nerves are described but also our technique of laparoscopic implantation of neuroprothesis for neuromodulation on somatic pelvic nerves or on autonomic pelvic nerves as…
Deep pain thresholds in the distal limbs of healthy human subjects.
2003
Pressure pain thresholds (PPTs) in distal limbs have been under-investigated despite their potential clinical importance. Therefore, we compared PPTs over nail bed, bony prominences, and muscle in distal parts of upper and lower limbs. We investigated 12 healthy subjects using three handheld devices: a spring-loaded, analogue pressure threshold meter (PTM) with two operating ranges, and an electronic Algometer. PPTs were determined with three series of ascending stimulus intensities with a ramp of about 50 kPa/s. PPTs were normally distributed in logarithmic space. PPTs over different tissues varied significantly (ANOVA, p0.001): mean thresholds and 95% confidence intervals were 615 kPa (26…
Spreading of sudomotor axon reflexes in human skin.
2005
Acetylcholine (ACh) activates both sudomotor fibers and primary afferent nociceptors. This leads to sudomotor and vasodilator axon reflexes, which can be diminished, for example, in neuropathies. In some neuropathies, however, there is increased axon reflex sweating, a response pattern that has never been observed for vasodilator flares.To compare both types of axon reflexes and to elucidate possible differences.In healthy young male subjects, sweat response and flare reaction in response to ACh were quantified. Constant-current iontophoresis (300 mC) of ACh was performed on the lateral lower legs. The sudomotor axon reflex was visualized with iodine starch staining, and the sweat response …
Central Versus Peripheral Adaptations Following Eccentric Resistance Training
2002
Aim of the present investigation was to study the effects of an eccentric training on the neuromuscular properties of the plantar-flexor muscles. The experiment was carried out on 14 males divided into two groups (eccentric and control). Eccentric training consisted of six sets of six eccentric contractions at 120 % of one maximal concentric repetition and it was performed four times a week during four weeks. Before and after the 4-wk period, the plantar-flexor torque and the associated electromyographic activity were recorded during voluntary contractions (isometric, concentric and eccentric) and electrically induced contractions (twitch and tetanus), in order to distinguish central from p…
Central motor conduction time by magnetic stimulation of the cortex and peripheral nerve conduction follow-up studies in Friedreich's ataxia.
1998
A follow-up clinical study, peripheral motor and sensory nerve conduction velocities and central motor conduction by magnetic stimulation of the cortex were performed in 13 patients with classical Friedreich's ataxia (FA) phenotype, for a period of 9-12 years. Clinical worsening was unrelated to peripheral nerve abnormalities. The amplitude of the nerve action potentials and delayed conduction velocity remained unchanged for several years. Central motor conduction times were abnormal in all patients. Clinical conditions worsened significantly between successive examinations with significant increments in threshold and significant decrement of the amplitude of motor evoked potentials. The re…
Cardiovascular autonomic neuropathy in type 1 diabetic patients with and without peripheral neuropathy.
1998
One hundred Type 1 diabetic patients (54 men, 46 women) mean age 28.9 +/- 8.4 years, were selected from among individuals referred to our hospital, with no previous diagnosis of diabetic chronic complications including diabetic neuropathy. After clinical and physical examinations, subjects were divided into two groups: with (n = 37) and without (n = 63) peripheral neuropathy. The percentage of subjects with cardiovascular autonomic neuropathy (AN), diagnosed by positive results to at least two of the five cardiovascular tests (Valsalva ratio, EI ratio, 30/15 ratio, blood-pressure response to standing up and handgrip test), was 40%: 72.9% in the group with peripheral neuropathy and 20.6% in …
Neuromuscular function during therapeutic knee exercise under water and on dry land
2001
Abstract Poyhonen T, Keskinen KL, Kyrolainen H, Hautala A, Savolainen J, Malkia E. Neuromuscular function during therapeutic knee exercise under water and on dry land. Arch Phys Med Rehabil 2001;82:1446-52. Objectives: To compare muscle activity and resistive drag force during knee extension-flexion exercises while barefoot and while wearing a Hydro Boot (increased frontal area) both under water and on dry land. Design: Participants performed the exercises while seated on an elevator chair under water. Setting: A hydrotherapy pool. Participants: Eighteen healthy persons (10 women, 8 men). Interventions: Not applicable. Main Outcome Measures: Isokinetic and isometric forces were measured wit…
Influence of Delay Period Duration on Inhibitory Processes for Response Preparation.
2015
In this study, we examined the dynamics of inhibitory preparatory processes, using a delayed response task in which a cue signaled a left or right index finger (Experiment 1) or hand (Experiment 2) movement in advance of an imperative signal. In Experiment 1, we varied the duration of the delay period (200, 500, and 900 ms). When transcranial magnetic stimulation (TMS) was applied 100 ms before the imperative, motor evoked potentials (MEPs) elicited in the first dorsal interosseous were strongly inhibited. For delays of 500 ms or longer, this inhibition was greater when the targeted muscle was selected compared with when it was not selected. In contrast, the magnitude of inhibition just aft…
Impaired refractory periods of peripheral sensory nerves in multiple sclerosis.
1978
Maximum conduction velocity and relative refractory period (RRP) of median nerve sensory fibers were studied in 36 patients diagnosed as having multiple sclerosis (MS) and in 31 controls. Maximum conduction velocity did not differ in the two groups, but the RRP was significantly prolonged in MS patients. Increased RRP is observed mainly when peripheral nerve myelin is abnormal or damaged. Our findings support the assumption that peripheral nerve myelinated fibers are usually involved in MS.
Diagnostic morphology of human eye-related storage disorders
1989
While retina and other ocular tissues are involved clinically and morphologically in a variety of lysosomal disorders, it is only the conjunctiva that is accessible by biopsy to morphological, i.e., electron microscopic recognition of the patient's individual lysosomal disease. However, this procedure is not utilized by many. Instead, skin and circulating lymphocytes are the most frequently obtained tissues for diagnostic investigation, as skin contains an abundance of diversified cell types for morphological examination and simultaneously fibroblasts to be cultured for biochemical investigation. It is the tissue most suitable for identifying lysosomal disorders and parallels in diagnostic …