High‐frequency ultrasonography—New non‐invasive method in assessment of skin lymphomas

2018 ◽  
Vol 24 (3) ◽  
pp. 517-521 ◽  
Author(s):  
A. Polańska ◽  
A. Dańczak‐Pazdrowska ◽  
K. Olek‐Hrab ◽  
A. Osmola‐Mańkowska ◽  
M. Bowszyc‐Dmochowska ◽  
...  
Keyword(s):  
High Frequency ◽  
Non Invasive ◽  
Invasive Method ◽  
High Frequency Ultrasonography

SAFETY AND TOLERABILITY OF DIFFERENT PROTOCOLS OF HIGH-FREQUENCY RHYTHMIC TRANSCRANIAL MAGNETIC STIMULATION

2019 ◽  
pp. 26-37
Author(s):  
I.S. Bakulin ◽  
A.G. Poydasheva ◽  
D.Yu. Lagoda ◽  
K.M. Evdokimov ◽  
A.Kh. Zabirova ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Side Effects ◽  
Healthy Volunteers ◽  
Brain Stimulation ◽  
High Frequency ◽  
Magnetic Stimulation ◽  
Facial Muscle ◽  
Non Invasive ◽  
Mood Changes ◽  
Invasive Method

Rhythmic transcranial magnetic stimulation (rTMS) is a non-invasive method for brain stimulation, widely used in the treatment of various diseases and in research. In this regard, the problems of rTMS safety and tolerability are becoming especially relevant. Most studies describe only serious side effects of rTMS, which, in fact, are extremely rare. Other side effects which affect rTMS tolerability have been studied to a much lesser extent. The objective of the study is to examine all side effects which occur during and after rTMS sessions through prospective open observation of patients and healthy volunteers. Materials and Methods. Using standardized questionnaires, the authors analyzed the incidence of side effects during high-frequency rTMS and within 24 hours after the procedure in 51 patients with various diseases of the nervous system and in 11 healthy volunteers. Results. The overall frequency of side effects was 59.5 % during stimulation and 50.2 % within 24 hours after the procedure. Serious side effects, which led to cessation of stimulation were recorded in 5 % of cases (n=3). They were associated with the syncope development (n=1) and severe headache (n=2). During rTMS, the most frequent manifestations of side effects were drowsiness (30.4 %), headache (25.8 %) and facial muscle contraction (14.7 %). Twenty-four hours after rTMS the most common manifestations were headache (15.7 %), mood changes (10.2 %) and mental alertness problems (9.4 %). It was found out, that headache was statistically more frequent at the beginning of the rTMS course. During rTMS, headache is often not so heavy and it is usually throbbing. However, within 24 hours after stimulation headache is usually moderate, pressing or dull. Conclusion. The obtained data confirm the importance of using standardized questionnaires for studying side effects and developing methods for their prevention and relief. Keywords: transcranial magnetic stimulation, non-invasive brain stimulation, safety, tolerance, side effects, headache, syncope.

The role of ultrasonography in diagnosing hourglass-like fascicular constriction(s) of the anterior interosseous nerve

2021 ◽  
pp. 028418512110529
Author(s):  
Tiezheng Wang ◽  
Hengtao Qi ◽  
Dehua Wang ◽  
Zengtao Wang ◽  
Shougang Bao ◽  
...  
Keyword(s):  
Median Nerve ◽  
High Frequency ◽  
Imaging Method ◽  
Upper Arm ◽  
Non Invasive ◽  
The Past ◽  
Anterior Interosseous Nerve ◽  
High Frequency Ultrasonography ◽  
Electrophysiological Examination

Background In the past, the diagnosis of hourglass-like fascicular constriction(s) of the anterior interosseous nerve mostly depended on electrophysiological examination, by which the location could not be diagnosed. There are few studies on the evaluation of hourglass-like fascicular constriction(s) by ultrasonography. Purpose To evaluate the role of ultrasonography in the diagnosis of hourglass-like fascicular constriction(s) of the anterior interosseous nerve. Material and Methods A retrospective analysis of 12 patients with hourglass-like fascicular constriction(s) of the anterior interosseous nerve was carried out, and the characteristics of the high-frequency ultrasonographic images were summarized and compared with surgical exploration. Results The 12 cases of hourglass-like fascicular constriction(s) of the anterior interosseous nerve were all located in the median nerve of the distal upper arm, including nine cases of single hourglass-like fascicular constriction and three cases of multiple hourglass-like fascicular constrictions. High-frequency ultrasonography can accurately locate the hourglass-like fascicular constriction(s) of the anterior interosseous nerve and the extent of neuropathy. The ultrasonographic images of hourglass-like fascicular constriction(s) of the anterior interosseous nerve showed single or multiple hourglass-like change(s) in the median nerve of the distal upper arm. The nerve fascicles on both sides of the affected nerve with hourglass-like change thickened. Conclusions High-frequency ultrasonography could be a reliable, convenient, and non-invasive diagnostic imaging method for hourglass-like fascicular constriction(s) of the anterior interosseous nerve.

scholarly journals High-Frequency Ultrasonography and Evaporimetry in Non-invasive Evaluation of the Nail Unit

2021 ◽  
Vol 8 ◽  
Author(s):  
Marta Szymoniak-Lipska ◽  
Adriana Polańska ◽  
Dorota Jenerowicz ◽  
Adam Lipski ◽  
Ryszard Żaba ◽  
...  
Keyword(s):  
High Frequency ◽  
Complex Structure ◽  
Plate Thickness ◽  
Nail Plate ◽  
Structure And Function ◽  
Dominant Hand ◽  
Entire Study ◽  
Non Invasive ◽  
High Frequency Ultrasonography ◽  
And Function

Background: The nail unit (NU) is a complex structure that performs a number of functions, including protection, defense, manipulation, and palpation. Non-invasive research methods can facilitate the recognition of NU structure and function. Evaporimetry and HF-USG due to their availability of equipment and low research costs seem to be particularly noteworthy, but so far have been assessed to a limited extent. The aim of the presented study was to check the usefulness of TOWL and HF-USG in examination of NU.Materials and Methods: A total of 58 volunteers aged 25–65 years (mean age: 41 ± 10.16 years) were qualified for the study. The subjects did not present symptoms of clinically evident onychopathy and did not suffer from any dermatoses associated with lesions occurring within the NU. Additionally, the patients did not suffer from systemic diseases that could affect NU (including heart, lung, and endocrine diseases). In all volunteers, the measurement of TOWL and 20 MHz ultrasonography [high-frequency ultrasonography (HF-USG)] with the special emphasis on determination of nail plate thickness were performed.Results: Analysis of 464 HF-USG images revealed that the nail plate presented as two hyperechoic, parallel streaks (railway sign) with a linear hypoechoic middle layer between them. Matrix was visualized as a hypoechoic structure with blurred boundaries, mostly within the fourth and fifth fingers and more often in women. We found statistically significant correlations between the type of a finger and the thickness of the nail plate both in the entire study group and taking into account gender. In the dominant hand, the results were r = −0.341; p < 0.001; r = −0.417, p < 0.001; and r = 0.337; p = 0.001 (for the whole group, for women, and for men, respectively). In the non-dominant hand, the results were r = −0.465; p < 0.001; r = −0.493, p < 0.01; and r = −0.503; p < 0.01 (for the whole group, for women, and for men, respectively). There were statistically significant differences in the thickness of the nail plates of the corresponding types of fingers between female and male NUs. Statistically significant correlations were found between the type of a finger and the TOWL value in the whole group and taking into account gender (p < 0.05), except for the non-dominant hand in men. There were no statistically significant differences in the TOWL values of the corresponding types of fingers between male and female NUs (p > 0.05). There was no statistically significant correlation between the TOWL value and the nail plate thickness in any of the tested NUs, apart from the one statistically significant correlation in nd5 (r = 0.390, p = 0.021).Conclusions: To sum up, non-invasive methods, such as HF-USG and TOWL, enable assessment of the NU and are useful in examination of its structure and function. HF-USG shows characteristic elements of NUs that can be distinguished because of differences in their echogenicity. The thickness of the nail plate and TOWL depend on the type of finger, and show a relationship with gender.

scholarly journals The relaxation effect of prolonged expiratory breathing

2018 ◽  
Vol 10 (1) ◽  
Author(s):  
Teruhisa Komori
Keyword(s):  
High Frequency ◽  
Spontaneous Breathing ◽  
Nervous Activity ◽  
Low Frequency ◽  
Relaxation Effect ◽  
Autonomic Nervous Activity ◽  
Non Invasive ◽  
Nervous Function ◽  
Invasive Method ◽  
The Mind

This study was performed to confirm that autonomic nervous activity is affected by breathing speed. I hypothesized that prolonged expiratory breathing would promote parasympathetic dominance, whereas rapid breathing would promote sympathetic dominance. Ten healthy men, ages 21–28 years old, were instructed to perform prolonged expiratory breathing (6 seconds expiration, 4 seconds inspiration) after spontaneous breathing and rapid breathing (1 second expiration, 1 second inspiration) after spontaneous breathing; changes in high frequency (HF) and low frequency (LF)/HF of heart rate variability (HRV) were measured during each type of breathing. During prolonged expiratory breathing, parasympathetic nervous function was significantly activated. Conversely, during rapid breathing, parasympathetic nervous function was significantly suppressed. The HRV method assessing sympathetic and parasympathetic modulation in this study is an indirect, non-invasive method with clear limitations. The use of additional techniques should be considered to clarify the relationships between the breathing speed and the mind.

Malfunctional Reorganization in the Developing Limbo-Prefrontal System in Animals: Implications for Human Psychoses?

2001 ◽  
Vol 12 (1) ◽  
pp. 8-14
Author(s):  
Gertraud Teuchert-Noodt ◽  
Ralf R. Dawirs
Keyword(s):  
Prefrontal Cortex ◽  
Mental Disorders ◽  
Dentate Gyrus ◽  
Cognitive Functions ◽  
Experimental Approach ◽  
Regulatory Mechanisms ◽  
Hippocampal Dentate Gyrus ◽  
Non Invasive ◽  
Invasive Method ◽  
Activity Dependent

Abstract: Neuroplasticity research in connection with mental disorders has recently bridged the gap between basic neurobiology and applied neuropsychology. A non-invasive method in the gerbil (Meriones unguiculus) - the restricted versus enriched breading and the systemically applied single methamphetamine dose - offers an experimental approach to investigate psychoses. Acts of intervening affirm an activity dependent malfunctional reorganization in the prefrontal cortex and in the hippocampal dentate gyrus and reveal the dopamine position as being critical for the disruption of interactions between the areas concerned. From the extent of plasticity effects the probability and risk of psycho-cognitive development may be derived. Advance may be expected from insights into regulatory mechanisms of neurogenesis in the hippocampal dentate gyrus which is obviously to meet the necessary requirements to promote psycho-cognitive functions/malfunctions via the limbo-prefrontal circuit.

THE USE OF HIGH FREQUENCY ULTRASONOGRAPHY IN CHILDREN WITH ENTEROPATHY

2005 ◽  
Vol 26 (S 1) ◽  
Author(s):  
A Brodzisz ◽  
P Wieczorek ◽  
A Mroczkowska-Juchkiewicz ◽  
A Pawlowska-Kamieniak ◽  
A Papierkowski
Keyword(s):  
High Frequency ◽  
High Frequency Ultrasonography
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