Asymmetry in two-point discrimination on the tongues of adults and children

McNutt, James C.

doi:10.1016/0021-9924(75)90014-3

Cited by 16 publications

(8 citation statements)

References 10 publications

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“…No participant achieved more than 90% correct, even on the coarsest grating. As mentioned above, previous studies using two-point discrimination have reported somatosensory acuity in the range of 1.5-2 mm ͑e.g., Ringel and Ewanowski, 1965;McNutt, 1975McNutt, , 1977Maeyama and Plattig, 1989;Sato et al, 1999͒. The results from the grating orientation task indicate that the task used in the current study can elicit above chance performance in groove widths as low as 0.75 mm ͑probe #3͒. Figure 4 shows that individuals with the highest contrast distance tended to have some of the highest scores for somatosensory acuity ͑high SAPC͒ and auditory acuity ͑low JND͒.…”

Section: Resultsmentioning

confidence: 81%

“…Prior studies of oral somatosensory sensitivity or acuity have typically used a two-point discrimination task ͑e.g., Ringel and Ewanowski, 1965;McNutt, 1975McNutt, , 1977Maeyama and Plattig, 1989;Sato et al, 1999͒. According to the results of these studies, two-point discrimination thresholds on the tongue are in the 1.5-2.5 mm range. However, according to Van Boven and Johnson ͑1994͒, "the conventional test, the two-point discrimination task, does not measure the limit of spatial resolution and it yields variable results because it does not control nonspatial cues."…”

Section: Session 1: Measurement Of Somatosensory Acuitymentioning

confidence: 98%

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An investigation of the relation between sibilant production and somatosensory and auditory acuity

Ghosh

Matthies

Maas

et al. 2010

The Journal of the Acoustical Society of America

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The relation between auditory acuity, somatosensory acuity and the magnitude of produced sibilant contrast was investigated with data from 18 participants. To measure auditory acuity, stimuli from a synthetic sibilant continuum ([s]-[ʃ]) were used in a four-interval, two-alternative forced choice adaptive-staircase discrimination task. To measure somatosensory acuity, small plastic domes with grooves of different spacing were pressed against each participant's tongue tip and the participant was asked to identify one of four possible orientations of the grooves. Sibilant contrast magnitudes were estimated from productions of the words 'said,' 'shed,' 'sid,' and 'shid'. Multiple linear regression revealed a significant relation indicating that a combination of somatosensory and auditory acuity measures predicts produced acoustic contrast. When the participants were divided into high- and low-acuity groups based on their median somatosensory and auditory acuity measures, separate ANOVA analyses with sibilant contrast as the dependent variable yielded a significant main effect for each acuity group. These results provide evidence that sibilant productions have auditory as well as somatosensory goals and are consistent with prior results and the theoretical framework underlying the DIVA model of speech production.

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Section: Resultsmentioning

confidence: 81%

Section: Session 1: Measurement Of Somatosensory Acuitymentioning

confidence: 98%

An investigation of the relation between sibilant production and somatosensory and auditory acuity

Ghosh

Matthies

Maas

et al. 2010

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

“…Consistent with the earlier work of Weinstein and colleagues, both groups of investigators concluded that there are no differences in sensitivity among homologous sites on the two sides ofthe face. It should be noted that left/right-sided differences in tactile acuity (viz., the two-point discrimination threshold) have been demonstrated on the tongues (and lips) of some individuals (Lass et al, 1972;McNutt, 1975). However, neither the right nor left side was consistently more spatially acute.…”

Section: Resultsmentioning

confidence: 92%

Spatial and Gender-dependent Variations in Perioral Pinprick Sensitivity

Lee

Essick

1993

J Dent Res

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Twenty-eight right-handed young adults participated in a sensory testing experiment to evaluate pinprick sensitivity at ten spatially matched sites on the right and left sides of the face. Stimuli were provided by a sharp-pointed dental explorer on which a rubber eraser had been positioned to minimize variations in the extent to which the skin was indented. Sharpness was defined as the magnitude at which abrupt, localized pricking/stinging sensations were evoked. A magnitude matching procedure was used to reduce among-subject variability in the data. Specifically, each estimate of sharpness was adjusted (i.e., divided) by the subject's mean estimate of the brightness of a visual stimulus. Prior to data collection, subjects were carefully instructed on the use of a common numerical scale for assignment of values of sharpness and brightness. Repeated-measures analysis of variance of the adjusted estimates of sharpness revealed a non-significant effect of gender (p > 0.4), a highly significant effect of side (p < 0.0001), and a highly significant effect of test site (p < 0.0001). Pinprick percepts were sharper on the left side of the face than on the right. Moreover, the vermilion of the upper lip exhibited the greatest sensitivity to pinprick; the vermilion of the lower lip exhibited the least sensitivity. These results suggest that use of a patient's sensitivity to pinprick during clinical neurosensory examination must be undertaken in an informed manner. A conclusion of pathological alteration in sensation can be made only after consideration of the normal spatial variations in the percept of sharpness.

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“…Reliable assessment of oral sensation poses many challenges because of the nature of the sensory innervation of the oral cavity, as well as some of the associated problems of children with eating impairments (Solomon, 1965). The intraoral innervation is multimodal, consisting of touch (Grossman, Hattis & Ringel, 1965), pressure, two-point discrimination (Ringel & Ewanowsky, 1965;McNutt, 1975;Graubard, Carrel & Chialastri, 1979), stereognosis (McDonald & Aungst, 1967Dette & Linke, 1982), taste and temperature. Thus, although it is possible to determine the loss of anyone modality, it is not clear how much the loss of one modality affects functional eating performance.…”

Section: Oral Sensory Evaluationmentioning

confidence: 99%

Oral sensorimotor therapy: Assessment, efficacy and future directions

Gisel

1994

Occupation Therapy Intl

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This review addresses the current state of knowledge in oral sensorimotor therapy for children with neurological impairments and ingestive problems. Comprehensive assessment of the child with dysphagia looks at the interaction of oral performance and growth. These domains include eating efficiency, oral‐motor skills, oral sensory evaluation, classification of the severity of an eating problem, interaction of respiration and ingestion, aspiration, positioning for feeding, social skills assessment, careload and assessment technologies. Oral sensorimotor therapy improves eating but not drinking skills in children 3–12 years of age. Weight gain is sufficient so that children maintain their growth channel but they do not show catchup growth. Many factors thought to contribute to better ingestive performance need further study, such as jaw and lip control in association with drinking. The earliest possible identification of infants at risk for eating impairments needs to be rigorously pursued. Such an approach offers hope that the later growth deterioration now seen in children with eating impairments may be prevented. Finally, the effect of positioning and the use of eating equipment to promote self‐feeding need further study.

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Asymmetry in two-point discrimination on the tongues of adults and children

Cited by 16 publications

References 10 publications

An investigation of the relation between sibilant production and somatosensory and auditory acuity

An investigation of the relation between sibilant production and somatosensory and auditory acuity

Spatial and Gender-dependent Variations in Perioral Pinprick Sensitivity

Oral sensorimotor therapy: Assessment, efficacy and future directions

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