Effect of Contactor Area on the Vibrotactile Threshold

1963 ◽  
Vol 35 (12) ◽  
pp. 1962-1966 ◽  
Author(s):  
Ronald T. Verrillo
Keyword(s):  
Vibrotactile Threshold ◽  
Contactor Area

Auditory Masking Effects on Lingual Vibrotactile Thresholds as a Function of Age

1982 ◽  
Vol 54 (3) ◽  
pp. 943-950 ◽  
Author(s):  
Donald Fucci ◽  
Linda Petrosino ◽  
Randall R. Robey
Keyword(s):  
Narrow Band ◽  
Wide Band ◽  
The Elderly ◽  
Vibrotactile Threshold ◽  
Auditory Masking ◽  
Experimental Conditions ◽  
College Age ◽  
Vibrotactile Thresholds ◽  
Simplified Procedures ◽  
Post Hoc

Auditory masking effects on lingual vibrotactile thresholds were examined across three groups of 10 subjects each. The first group included children 13 yr. of age or younger, the second group young college age adults, and the third group elderly individuals 66 yr. of age or older. Lingual vibrotactile thresholds were obtained from each group at a frequency of 250 Hz, under experimental conditions of no-masking, narrow-band masking, and wide-band masking. Results showed statistically significant threshold differences between the elderly group and the other two groups for all three experimental conditions. A difference was also detected between experimental conditions when an over-all statistical analysis was performed, but this difference disappeared under more stringent post hoc examination. Results are discussed with respect to current literature on aging and appropriate simplified procedures are recommended for future lingual vibrotactile threshold testing.

Possible Interaction between Vibration Thresholds by Sex and Motor Dominance in the Index Finger and Big Toe

1997 ◽  
Vol 85 (3) ◽  
pp. 1091-1098 ◽  
Author(s):  
Paul T. Ricci
Keyword(s):  
Significant Interaction ◽  
Index Finger ◽  
Forced Choice ◽  
Vibrotactile Threshold ◽  
Great Toe ◽  
Men And Women ◽  
Choice Procedure ◽  
Forced Choice Procedure ◽  
Main Effects ◽  
Monofilament Test

Two studies suggest a possible interaction among sex, motor dominance, and vibrotactile threshold for the great toe and index finger. In Study 1 a forced-choice procedure with the Vibratron II (Physitemp Instruments, Inc.) was used; a significant interaction between sex and foot dominance for vibratory threshold was noted with no main effects for the great toe. The greatest difference between men and women was on the nondominant side on the foot. Study 2 replicated Study 1 using the index finger as well as the great toe and used the Semmes-Weinstein monofilament test for a cross-modal comparison. A method of limits procedure was used to increase the generalizability of the data. A similar interaction was found between sex and motor dominance for the index finger but not the great toe. This was attributed to skewing of data for the toe. No effects were found for the Semmes-Weinstein test. Possible usefulness in detecting neuropathies is considered. Larger normative studies including variables such as age, height, and weight are required for generalizable conclusions.

Multidimensional tactile displays: Identification of vibratory intensity, frequency, and contactor area

1987 ◽  
Vol 82 (4) ◽  
pp. 1243-1252 ◽  
Author(s):  
W. M. Rabinowitz ◽  
A. J. M. Houtsma ◽  
N. I. Durlach ◽  
L. A. Delhorne
Keyword(s):  
Tactile Displays ◽  
Contactor Area

Changes in Lingual Sensitivity as a Function of Age and Stimulus Exposure Time

1982 ◽  
Vol 55 (3_suppl) ◽  
pp. 1083-1090 ◽  
Author(s):  
Linda Petrosino ◽  
Donald Fucci ◽  
Randall R. Robey
Keyword(s):  
Young Adult ◽  
Exposure Time ◽  
Stimulus Duration ◽  
Age Groups ◽  
The Elderly ◽  
Elderly Group ◽  
Vibrotactile Threshold ◽  
Stimulus Exposure ◽  
Adult Group ◽  
Vibrotactile Thresholds

Effects of duration of stimulus exposure on lingual vibrotactile thresholds were examined across three groups of 10 subjects each ( n = 30). Subjects were grouped according to age (child group, mean age = 10.1 yr.; young adult group, mean age = 21.9 yr.; elderly group, mean age = 76.0 yr.). Lingual vibrotactile threshold measurements were obtained for all subjects under 5 conditions of exposure (1, 2, 3, 4, and 5 sec.). Results showed statistically significant differences in threshold among all three age groups. As age increased, thresholds of lingual sensitivity increased (became poorer). Stimulus duration also created significant differences in threshold for all age groups. As stimulus duration increased, thresholds of lingual sensitivity decreased (became better). The children appeared to be the most stable across conditions whereas the elderly group appeared to be the most affected by stimulus duration.

scholarly journals Residential Proximity to Agricultural Fields and Neurological and Mental Health Outcomes in Rural Adults in Matlab, Bangladesh

2019 ◽  
Vol 16 (18) ◽  
pp. 3228
Author(s):  
Khalid M. Khan ◽  
Janesh Karnati ◽  
Ipsita Hamid ◽  
David Koceja ◽  
Mohammad Zahirul Islam ◽  
...  
Keyword(s):  
Mental Health ◽  
Health Outcomes ◽  
Pesticide Exposure ◽  
Mental Health Outcomes ◽  
Health Concern ◽  
Vibrotactile Threshold ◽  
Agricultural Fields ◽  
Trail Making Test ◽  
Residential Proximity ◽  
Trail Making

Pesticide exposure is an important rural public health concern that is linked to a spectrum of health outcomes in farmers. However, little is known about these effects on residents living in close proximity to agricultural fields and who are not involved in regular farming. This paper compared the effects of residential proximity to farming lands on a number of neurological and mental health outcomes in adults. A cross-sectional study was performed on 57 adults involved in farming only occasionally in rural Matlab in Bangladesh. A health and demographic surveillance system (HDSS) and geocoding were used to define proximity to the agricultural field. Neurological health was measured using the trail making test, vibrotactile threshold measurement, and dominant ulnar nerve conduction velocity (NCV) amplitude. An adapted Center for Epidemiological Studies Depression scale (CES-D) questionnaire was used to evaluate mental health. Results indicated that respondents living near agricultural fields had significantly higher vibrotactile threshold in big toes (p < 0.004) and needed a longer time to complete the trail making test (p < 0.004) than those living far from fields after accounting for the covariates. Results of this pilot study suggest further investigations to establish the impact of pesticide exposure among occasional and non-farmers on neurological health outcomes.

Sign in / Sign up

Export Citation Format

Share Document