The aim was to investigate how the primed and unprimed non-painful tactile stimuli during sleep w... more The aim was to investigate how the primed and unprimed non-painful tactile stimuli during sleep would be processed. A total of 22 healthy subjects (19.55 ± 1.10 years) were randomly divided into two groups. The same stimuli were applied to both groups, but the study group (SG) received them twice (daytime and sleep), whereas the control group (CG) received them only during sleep. A 40-channel PSG and a pneumatic tactile stimulator unit were used. Evoked potential components of the CZ electrode were examined in four sleep stages (N1, N2, N3, and REM). The Mann–Whitney U test was used for group comparison, and the Wilcoxon test was used for in-group evaluations. The P50 and N300 response components were observed in all sleep stages in both groups. P50 decreased as sleep deepened in the SG. The N300 increased as sleep deepened and started to decrease again in the REM stage. Moreover, in N1, the amplitudes of P200-N300 and N300-P450 in the SG were significantly greater than those in the...
IntroductionIt may be assumed that congenital absence of a certain sensory function would affect ... more IntroductionIt may be assumed that congenital absence of a certain sensory function would affect the processing of remaining sensory processes. The purpose of the present study was to evaluate chemosensory brain responsiveness both electrophysiologically and psychophysically in congenitally blind or deaf individuals.MethodsFourteen blind, 13 deaf, and 10 control subjects were recruited to this study. Psychophysical assessment of olfactory function was performed via “Sniffin’ Sticks” test. In this test, olfactory threshold, discrimination, identification, and total scores were compared between blind, deaf, and control subjects. In addition, electrophysiological assessment of olfactory function was performed via event-related potentials to olfactory and trigeminal stimuli.ResultsThe “Sniffin’ Sticks” test indicated frequent hyposmia in the deaf group. Discrimination and total scores of the deaf group were significantly lower than the control group. On the other hand, there were no significant differences between blind and control groups. Threshold and total scores of the deaf group were significantly lower than the blind group. There were no significant differences in amplitudes and latencies of any chemosensory-evoked potential components for both stimuli between the groups.ConclusionsThe deaf subjects appear to have lower olfactory test scores than blind and control subjects. Application of stimulants in a more complex setup may help to disentangle the various changes in chemosensory processing in the absence of other sensory channels.
The choice selection in a lab environment or real-life conditions remains a major problem to be t... more The choice selection in a lab environment or real-life conditions remains a major problem to be tackled in the field of neuroscience. The behavioral and electrophysiological correlates of the cognitive strategies behind this issue has been studied by our group. Dichotic tone ...
... Adile ÖNİZ 1 , Burcu AYDIN 1 , Necati GÖKMEN 2 , Murat ÖZGÖREN 1. ... Dr. Onur Güntürkün for ... more ... Adile ÖNİZ 1 , Burcu AYDIN 1 , Necati GÖKMEN 2 , Murat ÖZGÖREN 1. ... Dr. Onur Güntürkün for his valuable comments. Furthermore Onur Bayazıt, Sibel Kocaaslan, Dr. Handan Can, the teams of surgery and anesthesiology are appreciated for their contributions. ...
Objective: The current study aims to investigate the suitability of Sniffin' Sticks Test (SST... more Objective: The current study aims to investigate the suitability of Sniffin' Sticks Test (SST) for Turkish normosmic population and make appropriate modifications in Sniffin' Sticks Odor Identification Test for use in Turkey. Methods: Following the application of standard SST (N=147), an odor familiarity survey was applied (N=360) and used for construction and application of Modified Sniffin' Sticks Test for Turkish Population (MSST-T). Results: Mean scores for SST were as follows: odor threshold 7.7±2.8, odor discrimination 12.7±1.9, odor identification 12.4±2.0, Total score (TDI; Threshold, Discrimination and Identification) 32.8±4.3. Odors that were not familiar to the population were determined by odor familiarity survey. The MSST-T was developed by replacing unfamiliar odors with more familiar ones in items with low identification scores. MSST-T was applied to 184 participants and identification scores were found to increase from %78.3 to %84.2 (p < .0001). Conclusion: The odor familiarity as well as threshold, discrimination and identification measures of SST have been field-tested for normosmic population. With suitable modification of distracters in some identification test items, the test is expected to be reliably applicable for clinical use as well as for social, psychological and other research purposes in Turkey.
The aim was to investigate how the primed and unprimed non-painful tactile stimuli during sleep w... more The aim was to investigate how the primed and unprimed non-painful tactile stimuli during sleep would be processed. A total of 22 healthy subjects (19.55 ± 1.10 years) were randomly divided into two groups. The same stimuli were applied to both groups, but the study group (SG) received them twice (daytime and sleep), whereas the control group (CG) received them only during sleep. A 40-channel PSG and a pneumatic tactile stimulator unit were used. Evoked potential components of the CZ electrode were examined in four sleep stages (N1, N2, N3, and REM). The Mann–Whitney U test was used for group comparison, and the Wilcoxon test was used for in-group evaluations. The P50 and N300 response components were observed in all sleep stages in both groups. P50 decreased as sleep deepened in the SG. The N300 increased as sleep deepened and started to decrease again in the REM stage. Moreover, in N1, the amplitudes of P200-N300 and N300-P450 in the SG were significantly greater than those in the...
IntroductionIt may be assumed that congenital absence of a certain sensory function would affect ... more IntroductionIt may be assumed that congenital absence of a certain sensory function would affect the processing of remaining sensory processes. The purpose of the present study was to evaluate chemosensory brain responsiveness both electrophysiologically and psychophysically in congenitally blind or deaf individuals.MethodsFourteen blind, 13 deaf, and 10 control subjects were recruited to this study. Psychophysical assessment of olfactory function was performed via “Sniffin’ Sticks” test. In this test, olfactory threshold, discrimination, identification, and total scores were compared between blind, deaf, and control subjects. In addition, electrophysiological assessment of olfactory function was performed via event-related potentials to olfactory and trigeminal stimuli.ResultsThe “Sniffin’ Sticks” test indicated frequent hyposmia in the deaf group. Discrimination and total scores of the deaf group were significantly lower than the control group. On the other hand, there were no significant differences between blind and control groups. Threshold and total scores of the deaf group were significantly lower than the blind group. There were no significant differences in amplitudes and latencies of any chemosensory-evoked potential components for both stimuli between the groups.ConclusionsThe deaf subjects appear to have lower olfactory test scores than blind and control subjects. Application of stimulants in a more complex setup may help to disentangle the various changes in chemosensory processing in the absence of other sensory channels.
The choice selection in a lab environment or real-life conditions remains a major problem to be t... more The choice selection in a lab environment or real-life conditions remains a major problem to be tackled in the field of neuroscience. The behavioral and electrophysiological correlates of the cognitive strategies behind this issue has been studied by our group. Dichotic tone ...
... Adile ÖNİZ 1 , Burcu AYDIN 1 , Necati GÖKMEN 2 , Murat ÖZGÖREN 1. ... Dr. Onur Güntürkün for ... more ... Adile ÖNİZ 1 , Burcu AYDIN 1 , Necati GÖKMEN 2 , Murat ÖZGÖREN 1. ... Dr. Onur Güntürkün for his valuable comments. Furthermore Onur Bayazıt, Sibel Kocaaslan, Dr. Handan Can, the teams of surgery and anesthesiology are appreciated for their contributions. ...
Objective: The current study aims to investigate the suitability of Sniffin' Sticks Test (SST... more Objective: The current study aims to investigate the suitability of Sniffin' Sticks Test (SST) for Turkish normosmic population and make appropriate modifications in Sniffin' Sticks Odor Identification Test for use in Turkey. Methods: Following the application of standard SST (N=147), an odor familiarity survey was applied (N=360) and used for construction and application of Modified Sniffin' Sticks Test for Turkish Population (MSST-T). Results: Mean scores for SST were as follows: odor threshold 7.7±2.8, odor discrimination 12.7±1.9, odor identification 12.4±2.0, Total score (TDI; Threshold, Discrimination and Identification) 32.8±4.3. Odors that were not familiar to the population were determined by odor familiarity survey. The MSST-T was developed by replacing unfamiliar odors with more familiar ones in items with low identification scores. MSST-T was applied to 184 participants and identification scores were found to increase from %78.3 to %84.2 (p < .0001). Conclusion: The odor familiarity as well as threshold, discrimination and identification measures of SST have been field-tested for normosmic population. With suitable modification of distracters in some identification test items, the test is expected to be reliably applicable for clinical use as well as for social, psychological and other research purposes in Turkey.
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