A potential new fabric evaluation approach by capturing brain perception under fabric contact pressure

Abstract

The problem of the transmission mechanism of textile perception and the barrier to express textile cognition directly are the two major issues in the field of textile evaluation. In this study, an advanced biomedical imaging technology, functional magnetic resonance imaging, which is non-invasive and has a high temporal resolution and spatial resolution, was utilized to describe the features of brain perception in the brain mask areas under increased fabric contact pressures, and thus it was attempted to provide a new approach to express fabric comfort perception. As a result, we found that when fabric contact pressure increased from 0.5 to 1.5 kPa, both maximum activation intensity T Z and activation proportion K of the peak points were transferred from the postcentral gyrus in the SI to the amygdala, and were negative activations. Therefore, we drew the conclusion that both a lower and a higher fabric contact pressure (about 1 kPa of proper comfort fabric pressure) would produce a brain signal inhibitory effect on the SI and amygdala. The difference was the fact that the inhibition role on the SI was more obvious under a lower pressure, while the inhibition role on the amygdala was more remarkable under a higher pressure, which meant that the SI, particularly the postcentral gyrus in the SI, was likely to play a significant role in surface tactile perception of fabrics, while the amygdala might be related to the fabric oppressing sensation.

Functional connectivity characteristics of the brain network involved in prickle perception of single fiber stimulation

“…In recent years, in order to figure out the neural mechanism of prickle perception, advanced technologies of neurosciences were used to study brain responses to cutaneous prickling stimulation. 5 For example, EEG (electroencephalogram) and ERPs (event-related potentials) techniques, because of high temporal resolution, were often used by researchers to study the contact comfort of fabric. 6 An EEG study 7 showed that the percentages of θ, α, and β rhythm can be used as indexes to evaluate prickle sensation of fabric.…”

“…Many researchers studied the causes, 2 evaluation methods, 3 and elimination methods 4 of it. In recent years, in order to figure out the neural mechanism of prickle perception, advanced technologies of neurosciences were used to study brain responses to cutaneous prickling stimulation 5 . For example, EEG (electroencephalogram) and ERPs (event‐related potentials) techniques, because of high temporal resolution, were often used by researchers to study the contact comfort of fabric 6 .…”

Analysis of brain signal change response in amygdala evoked by skin pressure stimulus

“…Tan 10 studied and analyzed the fMRI of human brain under the stimulation of fabric contact thermal pain, obtained that contralateral amygdala was activated at 41 • C, and bilateral amygdala were activated at 51 • C. In the previous study, we also found that amygdala brain regions would produce a certain amount of negative activation under large fabric pressure stimulation. 11 Wang 12 found that repetitive prickling stimulation from the single fiber applied to the volar forearm aroused activation in amygdala.…”

“…In the previous study, we also found that amygdala brain regions would produce a certain amount of negative activation under large fabric pressure stimulation. 11 Wang 12 found that repetitive prickling stimulation from the single fiber applied to the volar forearm aroused activation in amygdala.…”

Brain signal changes of sensory cortex according to surface roughness of boneless corsets

“…When human skin is stimulated by contact with a fabric surface, contact and friction stimulate the tactile receptors in the skin, thus forming the action potential; the action potential is transmitted to the somatosensory centers of the brain along the nerve fibers; the conduction direction, amplitude and time information carry stimulus information of the fabric surface, resulting in the somatosensory cortex of the brain showing a series of response perception corresponding to the fabric surface contact. [1][2][3] The purpose of this was to use advanced biomedical technology, fMRI (functional Magnetic Resonance Imaging), to extract the human brain signal in the sensory cortex related to the perception of attention, BOLD-PSC or PSC (percent of blood oxygen level dependent signal change, or percent signal change), as a new quantitative evaluation index of the fabric surface roughness perception of brain signals, to make up for theoretical guidance defects 4,5 and quantitative description loopholes [6][7][8] of the existing textile industry fabric sensory evaluation systems.…”