Cutaneous Perception

Weisenberger, Janet M.

doi:10.1002/9780470753477.ch17

Cited by 7 publications

(7 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The primary stimuli for tactile sensation are touch, pressure and vibration applied to skin, and mechanoreceptors are sensitive to the skin deformation caused by mechanical pressure 28 . Various traditional techniques such as the Semmes-Weinstein nylon monofilaments for pressure perception, tuning forks for the vibration thresholds and two-point discrimination (TPD) tests have been used for measuring the sensitivity of mechanoreceptors 5 , 6 , 26 .…”

Section: Introductionmentioning

confidence: 99%

Two-point discrimination values vary depending on test site, sex and test modality in the orofacial region: a preliminary study

Won

Kim

et al. 2017

J. Appl. Oral Sci.

View full text Add to dashboard Cite

The two-point discrimination (TPD) test is one of the most commonly used neurosensory tests to assess mechanoperception in the clinical settings. While there have been numerous studies of functional sensibility of the hand using TPD test, there have been relatively not enough reports on TPD in the orofacial region. Objective The aims of the present study were to determine the normal values of TPD in the six trigeminal sites (the forehead, cheek, mentum, upper lip, lower lip, and the tongue tip) and to investigate the effect of the site, sex, and test modality on the TPD perception.Material and Methods Forty healthy volunteers consisting of age-matched men (20) and women (20) with a mean age of 27.1 years were recruited. One examiner performed the TPD test using a simple hand-operated device, i.e., by drawing compass with a blunt or sharp-pointed tip. The static TPD with a blunt-pointed tip (STPDB), moving TPD with a blunt-pointed tip (MTPDB), and static TPD with a sharp-pointed tip (STPDS) were measured. The predictors were the site, sex, and test modality, and the outcome variable was the TPD value. Three-way ANOVA was used for statistics.Results The analysis showed a significant effect of the site, sex and test modality on the TPD values. Significant differences between the test sites were observed with the descending order from the forehead and cheek>mentum>upper lip and lower lip>tongue tip and index finger. Women showed lower TPD values than those of men. The STPDS measurements were consistently lower than those of the STPDB and MTPDB.Conclusions The normal values of TPD in this study suggest that the cheek and forehead were less sensitive than other regions evaluated and women were more sensitive than men. The STPDS was the most sensitive test modality.

show abstract

Section: Introductionmentioning

confidence: 99%

Two-point discrimination values vary depending on test site, sex and test modality in the orofacial region: a preliminary study

Won

Kim

et al. 2017

J. Appl. Oral Sci.

View full text Add to dashboard Cite

show abstract

“…Yet, tactile perception is as complex and sophisticated as visual perception, to which it is often compared. For example, texture and tactile pattern perception is achieved by the integration of information conveyed through four distinct psychophysical channels associated with distinct receptor types embedded under the skin surface (Weisenberger, 1991) and these receptors work in concert with active movements (Weisenberger, 1991) in a similar manner to the way eye movements enable scanning of the environment by the visual system. In autism a preference for use of proximal rather than distal sensory stimulation has been repeatedly suggested on the basis of behavioural observations (Schopler, 1965 but also see Kootz, Marinelli, & Cohen, 1980).…”

mentioning

confidence: 99%

Discrimination in Autism Within Different Sensory Modalities

O’Riordan

Passetti

2006

J Autism Dev Disord

174

110

View full text Add to dashboard Cite

Recent studies have suggested that unusual visual processing in autism might stem from enhanced visual discrimination. Although there are also many anecdotal reports of auditory and tactile processing disturbances in autism these have received comparatively little attention. It is possible that the enhanced discrimination ability in vision in autism might extend to other modalities and further that they may underlie many reports of unusual touch and audition. The present study investigated the performance of children with and without autism on auditory and tactile discrimination tasks and revealed superior auditory but comparable tactile discrimination in autism relative to controls. These results extend previous findings of perceptual discrimination in autism and may be relevant for a neuro-developmental hypothesis of the disorder.

show abstract

“…In Figure 4, the isotropic composite Young's modulus is plotted as a function of nanotube eight fraction for the randomized composites made from each of the four effective fiber RVEs mbedded in the VST matrix material. It was assumed that the VST density was 1 g/cm 3 . The anotube bundle and the non-bonded VST/SWNT composite behaved similarly despite the threeld difference in nanotube volume fraction content per RVE.…”

Section: Resultsmentioning

confidence: 99%

“…Previous work has proposed the synthesis of crosslinked nanotube materials with short rigid tethers and has used multi-scale model to address the effect of crosslinking the carbon nanotubes on the constitutive properties [1]. In related work, others have fabricated polyacrylonitrile (PAN) fibers reinforced with carbon nanotubes that demonstrated tensile modulus increases of up to 100 % at 10 wt% single-walled carbon nanotube (SWNT) content [2] and 30 % increases in modulus at 5 wt% multi-walled nanotube content [3]. In the SWNT/PAN fibers, the nanotubes also align well and are partially exfoliated [2].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Modeling of Nanotube Materials with Variable Stiffness Tethers

et al. 2004

View full text Add to dashboard Cite

Synthesis, mechanical testing, and modeling have been performed for carbon nanotube based materials. Tests using nanoindentation indicated a six-fold enhancement in the storage modulus when comparing the base material (no nanotubes) to the composite that contained 5.3 wt% of nanotubes. To understand how crosslinking the nanotubes may further alter the stiffness, a model of the system was constructed using nanotubes crosslinked with a variable stiffness tether (VST). The model predicted that for a composite with 5 wt% nanotubes at random orientations, crosslinked with the VST, the bulk Young's modulus was reduced by 30% compared to the noncrosslinked equivalent.

show abstract

Cutaneous Perception

Cited by 7 publications

References 66 publications

Two-point discrimination values vary depending on test site, sex and test modality in the orofacial region: a preliminary study

Two-point discrimination values vary depending on test site, sex and test modality in the orofacial region: a preliminary study

Discrimination in Autism Within Different Sensory Modalities

Synthesis, Characterization, and Modeling of Nanotube Materials with Variable Stiffness Tethers

Contact Info

Product

Resources

About