Search results for "Finger"

Analysis of Received Signal Strength Quantization in Fingerprinting Localization

2020

In recent times, Received Signal Strength (RSS)-based Wi-Fi fingerprinting localization has become one of the most promising techniques for indoor localization. The primary aim of RSS is to check the quality of the signal to determine the coverage and the quality of service. Therefore, fine-resolution RSS is needed, which is generally expressed by 1-dBm granularity. However, we found that, for fingerprinting localization, fine-granular RSS is unnecessary. A coarse-granular RSS can yield the same positioning accuracy. In this paper, we propose quantization for only the effective portion of the signal strength for fingerprinting localization. We found that, if a quantized RSS fingerprint can …

PIRKSTIŅU ROTAĻAS RUNAS ATTĪSTĪBAS VEICINĀŠANAI VIDĒJĀ PIRMSSKOLAS VECUMA BĒRNIEM

2017

Darba autore – Iveta Redīza Bakalaura darba temats - Pirkstiņu rotaļas runas attīstības veicināšanai vidējā pirmskolas vecuma bērniem. Darba mērķis – teorētiski un praktiski raksturot pirkstiņ rotaļu izmantošanas nepieciešamību un nosacījumus pirmsskolas vecuma bērnu runas attīstības veicināšanai. Lai sasniegtu izvirzīto mērķi, pētījuma laikā tika izvirzīti uzdevumi: 1. Raksturota runas attīstība un tās nozīme bērna vispārīgā attīstībā. 2. Noteikti un raksturoti vidējā pirmsskolas vecuma bērnu runas attīstības kritēriji. 3. Analizētas pirkstiņ rotaļas un to nozīme pirmsskolas pedagoģiskajā procesā. 4. Pārbaudīta pirkstiņ rotaļu efektivitāte vidējā pirmsskolas bērnu runas attīstībai. 5. Izst…

Motor Cortex Function in Fibromyalgia: A Study by Functional Near-Infrared Spectroscopy

2019

Previous studies indicated changes of motor cortex excitability in fibromyalgia (FM) patients and the positive results of transcranial stimulation techniques. The present study aimed to explore the metabolism of motor cortex in FM patients, in resting state and during slow and fast finger tapping, using functional Near-Infrared Spectroscopy (fNIRS), an optical method which detects in real time the metabolism changes in the cortical tissue. We studied 24 FM patients and 24 healthy subjects. We found a significant slowness of motor speed in FM patients compared to controls. During resting state and slow movement conditions, the metabolism of the motor areas was similar between groups. The oxy…

More comprehensive proprioceptive stimulation of the hand amplifies its cortical processing

2021

Corticokinematic coherence (CKC) quantifies the phase coupling between limb kinematics and cortical neurophysiological signals reflecting proprioceptive feedback to the primary sensorimotor (SM1) cortex. We studied whether the CKC strength or cortical source location differs between proprioceptive stimulation (i.e., actuator-evoked movements) of right-hand digits (index, middle, ring, and little). Twenty-one volunteers participated in magnetoencephalography measurements during which three conditions were tested: 1) simultaneous stimulation of all four fingers at the same frequency, 2) stimulation of each finger separately at the same frequency, and 3) simultaneous stimulation of the fingers…

Analysis of Somatosensory Cortical Responses to Different Electrotactile Stimulations as a Method Towards an Objective Definition of Artificial Senso…

2022

Sensory feedback is a critical component in many human-machine interfaces (e.g., bionic limbs) to provide missing sensations. Specifically, electrotactile stimulation is a popular feedback modality able to evoke configurable sensations by modulating pulse amplitude, duration, and frequency of the applied stimuli. However, these sensations coded by electrotactile parameters are thus far predominantly determined by subjective user reports, which leads to heterogeneous and unstable feedback delivery. Thus, a more objective understanding of the impact that different stimulation parameters induce in the brain, is needed. Analysis of cortical responses to electrotactile afference might be an effe…

Identification of proprioceptive thalamocortical tracts in children: comparison of fMRI, MEG, and manual seeding of probabilistic tractography

2022

Publisher Copyright: © The Author(s) 2022. Published by Oxford University Press. Studying white matter connections with tractography is a promising approach to understand the development of different brain processes, such as proprioception. An emerging method is to use functional brain imaging to select the cortical seed points for tractography, which is considered to improve the functional relevance and validity of the studied connections. However, it is unknown whether different functional seeding methods affect the spatial and microstructural properties of the given white matter connection. Here, we compared functional magnetic resonance imaging, magnetoencephalography, and manual seedin…

Just lip prints? No: there could be something else

2004

Delayed feedback of somato-motor cortex activations modulates finger tapping results in real-time functional MR imaging

2007

Digital Rectal Examination (Fig. 2a and 2b)

1979

During examination of the anal region and before doing the rectal examination, the hand is protected by a plastic glove. A number of disposable gloves of varying strengths are on the market. One may additionally use a finger cot on the forefinger, which is removed after the examination. The examination can also be done using a finger cot alone with the finger stuck through a piece of gauze that protects the rest of the hand. Right-handed examiners often elect to use the forefinger of the left hand for the rectal examination and keep the right hand uncontaminated for handling instruments.

Tactile enumeration: A case study of acalculia

2018

Abstract Enumeration is one of the building blocks of arithmetic and fingers are used as a counting tool in early steps. Subitizing—fast and accurate enumeration of small quantities—has been vastly studied in the visual modality, but less in the tactile modality. We explored tactile enumeration using fingers, and gray matter (GM) changes using voxel-based morphometry (VBM), in acalculia. We examined JD, a 22-year-old female with acalculia following a stroke to the left inferior parietal cortex. JD and a neurologically healthy normal comparison (NC) group reported how many fingers were stimulated. JD was tested at several time points, including at acute and chronic phases. Using the sensory …