Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"stimulus intensity"”.
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Cue and Contextual Stimulus Intensity in Discrimination Learning
Made available in DSpace on 2015-05-12T17:10:41Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0013540.PDF: 3147122 bytes, checksum: 1612cea418c824335fbbed173f2a340f (MD5) Previous issue date: 1955
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Stimulus intensity effects on the steady-state visual evoked potential
… visual stimuli, is positively correlated with stimulus intensity. SSVEPs are often used as input mechanisms for brain-computer interfaces (BCIs), systems that establish a direct communication channel between human brains and computers. User performance with SSVEP-based BCIs is dependent on the …
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Stimulus-Intensity and Adaptation-Level as Determinants of Simple Reaction Time
Made available in DSpace on 2014-12-08T23:01:32Z (GMT). No. of bitstreams: 1 6706650.pdf: 1872885 bytes, checksum: b3d371bdc48d890cf405bee96f8d5062 (MD5) Previous issue date: 1966
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Effects of pain and fear stimulus intensity levels on pain responding in chronic pain patients
… contexts, and the effects of fear and pain stimulus intensity levels on pain responding have not been examined. Forty chronic pain patients were exposed to an algometer pressure pain device which stimulated different fingers; there were two levels of pressure pain (i.e., high and low). Also, …
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The influence of pressure stimulus intensity on pain perception and neuromuscular performance in healthy males
… between the expected pain severity and the stimulus applied, while there was a significant difference in the perception of pain severity reported via VAS (F = 27.971; p < 0 05) no significant difference in force output was found (x2(2) = .452, p>0.05). The studies presented within this …
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Tone-evoked Fos labeling in the central auditory pathway : effects of stimulus intensity and auditory fear conditioning
Understanding intensity coding and auditory learning are basic concerns of research on the auditory central pathway. There is no unifying model of intensity coding but several mechanisms have been proposed to play a role. The first aim of this thesis was to determine the mechanisms of intensity …
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Effects of Stimulus Intensity and Method of Stimulus Presentation Upon Simple Reaction Time: Evaluation of a Decision-Theory Model
Made available in DSpace on 2014-12-08T23:01:47Z (GMT). No. of bitstreams: 1 6901397.pdf: 2536210 bytes, checksum: 3fb1367642926057fe310fc50dc6f43c (MD5) Previous issue date: 1968
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The Effects of Stimulus Position, Stimulus Intensity, and Intensity of Intermittent Background Illumination on The Duration of a Series of After-Images
Made available in DSpace on 2014-12-08T23:01:03Z (GMT). No. of bitstreams: 1 6406107.pdf: 3254583 bytes, checksum: 1201fe9d5855bc9cf7f7bec1d43066a2 (MD5) Previous issue date: 1963
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Non-invasive measurement of trigeminal nerve somatosensory evoked potentials
… a non-invasive recording capability for TSEPs. Stimulus intensity and artifact, cortical recording sites, stimulation electrode design and placement were explored. Statistically significant differences in amplitude of TSEP waveform components at 13, 19 and 27 ms between uninjured and whiplashed …
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Focused orientation of campaniform sensilla on Periplaneta americana L. (Orthoptera: Blattidae) trochanters and femurs
… focused in series and/or parallel on a common stimulus origin, stimulus intensity, variation of the propagation pathway lengths, and cuticle conformation between the stimulus origin and campaniform sensilla may effect the temporal depolarization patterns. Within parallel and series focuses, low …
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Optimizing the neural response to electrical stimulation and exploring new applications of neurostimulation
… shell were compared. Intake levels in the low stimulus intensity group (n=3, 100&mgr;A current) decreased by as much as 43% during stimulation, but the effect did not persist. In the high stimulus intensity group (n=4, 200&mgr;A current), alcohol intake decreased as much as 59%, and the effect …
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Neural Dynamics, Adaptive Computations, and Sensory Invariance in an Olfactory System
… spatiotemporal neural response patterns encode stimulus-specific information (i.e. ‘neural code’), and how they are translated to generate behavioral output are fundamental questions in systems neuroscience. The objective of this dissertation is to examine this issue in the locust olfactory …
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The Dissociation of Valence and Intensity Using Alliesthesia and Thermal Stimulation
… that valence, how pleasant or unpleasant a stimulus is perceived, and intensity, the strength with which a stimulus is perceived, constitute two primary dimensions that describe affective experience. However, the inherent relationship between valence and intensity has limited imaging studies …
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Variability of Neural Responses in the Lateral Prefrontal Cortex
… activity throughout a delay period in which the stimulus is absent. The dorsolateral prefrontal cortex has long been implicated as the seat of visuospatial working memory, and undergoes dramatic increases in volume and functional connectivity during and around the time of puberty. However, much …
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Precision and reliability of cochlear nerve response in mice lacking functional synaptic ribbons
… by sustained exocytosis that is graded with stimulus intensity and can achieve high release rates. Leading hypotheses implicate the ribbon in maintenance of a large readily releasable pool (RRP) of presynaptic vesicles which enables rapid and precisely-timed exocytosis that supports …
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The impact of cardiac feedback on human cognition
… systole; pain ratings did not vary regardless of stimulus intensity. Study Three compared both schedules of stimulation independently of cardiac cycle timings. When unpredictable, shocks elicited hypoalgesia but also the highest nociceptive responses, indicating that pain dissociates from …
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Rod-cone interaction through flicker detection and the course of critical flicker frequency during dark adaptation
… adaptation. Also, measurements were made of the stimulus intensity necessary to just perceive flicker for a wide range of frequencies. The resulting data clearly demonstrate a rod-cone interaction causing a suppression of the threshold. Our results reproduce the familiar rod and cone branches of …
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Combined fMRI and electrical microstimulation to determine functional connections in visual areas of the primate brain
… and suppression of the representation of a stimulus presented at the saccadic endpoint, or movement field (MF), of the stimulated FEF site. Modulation occurred at multiple levels of the visual system and the signals presumably causing it appeared to be gated in the earliest cortical areas by …
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Temporal Dynamics of Heat Pain Sensations
… skin, and 4) determine the role of absolute stimulus temperatures on sex differences in pain adaptation and habituation. A broad-based heat pain model was developed for this study that incorporates a temporally-continuous assessment of multiple sensory and affective pain dimensions, including …
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