Arşiv ve Dokümantasyon Merkezi
Dijital Arşivi

Effects of frequency on the temporal summation in the pacinian psychophysical channel

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dc.contributor Graduate Program in Biomedical Engineering.
dc.contributor.advisor Güçlü, Burak.
dc.contributor.author Kılınç, Deniz.
dc.date.accessioned 2023-03-16T13:13:07Z
dc.date.available 2023-03-16T13:13:07Z
dc.date.issued 2017.
dc.identifier.other BM 2017 K56
dc.identifier.uri http://digitalarchive.boun.edu.tr/handle/123456789/18892
dc.description.abstract According to the temporal summation theory, increasing stimulus duration causes a decrease in detection psychophysical threshold. Unlike previous psychophysical studies based on the fast adaptive tracking procedure, in this thesis, psychometric functions of the Pacinian channel were measured with the method of constant stimuli to investigate the e ects of frequency on temporal summation in more detail. Six female and four male subjects (age: 25-30) participated in the experiment. Sinusoidal bursts of mechanical displacement were applied on the middle ngertip of each subject by using a cylindrical contactor (r = 2 mm) at six frequencies (100, 150, 250, 350, 500, and 750 Hz), and ve durations (10, 30, 100, 300, and 1000 ms). For each frequency-duration pair, six di erent amplitudes were used with 40 repetitions to obtain detection probabilities in a two-interval forced-choice task. The data points were tted by sigmoidal curves to nd psychometric functions. Average goodness of ts (R2) was 0.88. Midpoints and the slopes of psychometric curves were statistically analyzed. Following aligned rank transform, repeated measures ANOVA was used to study the the e ects of duration, frequency and their interaction. As expected, the thresholds had the characteristic U-shape (F(5,45) = 42.50, p < 0.001); the slopes had an inverted U-shape (F(5,45) = 29.64, p < 0.001). Both thresholds (F(4,36) = 60.34, p < 0.001) and slopes (F(4,36) = 26.58, p < 0.001)) were a ected by duration due to temporal summation. However, there was no interaction between frequency and duration for the thresholds (F(1,9) = 4.84, p = 0.055 ), which means that temporal summation in the Pacinian channel does not signi cantly vary with frequency.|Keywords : Touch, somatosensory, psychophysics, psychometric function, temporal summation, Pacinian channel, vibrotactile stimulation.
dc.format.extent 30 cm.
dc.publisher Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2017.
dc.subject.lcsh Touch.
dc.subject.lcsh Psychophysics.
dc.subject.lcsh Electrophysiology.
dc.title Effects of frequency on the temporal summation in the pacinian psychophysical channel
dc.format.pages xiii, 51 eaves ;


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