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 30 for “"Electric stimulation"”.
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Responses from electric stimulation of cochlear nucleus
… onto different targets. This research used focal electric stimulation of small, confined parts of the CN in anesthetized guinea pigs to resolve the roles of the CN divisions, in two contexts. Part i explored the effect of stimulation on the gross neural potential (electrically evoked auditory …
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Electric stimulation parameters for an epi-retinal prosthesis
… obstacle to the success of this approach. Stimulation of ganglion cell axons-which lie in the optic nerve fiber layer between stimulating electrodes and their intended targets, and which originate from a relatively diffuse peripheral region-would probably convey the perception of a …
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Modulation of motor learning with high-intensity transcranial electric stimulation
<p>Research thus far on noninvasive, transcranial electric stimulation have produced mixed results from <em>in vivo</em> human experiments. This work tests the hypothesis that applying higher stimulation intensities would induce intracranial electric fields that more closely match the higher …
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Neural and mechanical responses to electric stimulation of the cat's inner ear.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1971. Ph.D.
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Binaural interactions in the auditory midbrain with bilateral electric stimulation of the cochlea
… of the auditory midbrain, were studied using electric stimulation of bilaterally implanted intracochlear electrode arrays. Neural tuning to interaural timing difference (ITD) was emphasized since it is an important binaural cue and is well represented in IC neural responses. Stimulation …
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Acoustic and Electric Stimulation of the Cochleas of Hearing and Deaf Guinea Pigs and Electrocortical Responses
Made available in DSpace on 2014-12-11T23:56:05Z (GMT). No. of bitstreams: 1 7105254.pdf: 2417337 bytes, checksum: 9e3f8eff83dfd6e358b5af7ff92ddfe2 (MD5) Previous issue date: 1970
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The benefits of acoustic input to combined electric and contralateral acoustic hearing
… both in quiet and in noise from combined electric and contralateral acoustic stimulation (EAS). Speech-recognition performance of consonant-nucleus vowel-consonant (CNC) words in quiet and AzBio sentences in a competing babble noise at +10 dB SNR was evaluated in nine cochlear-implant …
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Efeitos dos estímulos elétricos senoidais na resposta induzida cerebral: estudo da seletividade das fibras sensitivas
Different frequencies of the sine-wave electric stimulation (EES) would activate the Aβ (2 and 3 kHz) and C (5 Hz) fibers specifically, especially at intensities close to the sensorial threshold (LS). The EES-induced cortical responses are unknown, in addition to whether they are capable of …
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FingerEye: An Electrotactile-mechanism Enabled Adaptive Sensory-substitution Aid for the Blind and Visually Impaired
… device and associated fingertip skin stimulation mechanisms for the blind or visually impaired (BVI). The final goal is to develop a novel electrotactile-based Braille (E-Braille) technology that helps the BVI to read any printed text that is not only written in the Braille language. …
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Current steering and electrode spanning with partial tripolar stimulation mode in cochlear implants
… hearing sensation to profoundly deaf people by electrically stimulating the surviving auditory neurons. However, CI users perform poorly in challenging listening tasks such as speech recognition in noise and Cochlear implants (CIs) partially restore hearing sensation to profoundly deaf people by …
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Can the phased array stimulation strategy be implemented using the advanced bionics cochlear implant?
… to the deaf by converting acoustic signals to electric stimuli delivered to electrodes implanted in the inner ear. Theoretically, the phased array stimulation strategy described by van den Honert and Kelsall (2007) provides much better control over the neural excitation patters elicited by …
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Study of Size Reduction, Reliability and Lead Safety of an Intra-Cochlear Lead-Zirconate-Titanate Micro-Actuator
… have developed hearing aids with combined electric and acoustic stimulations to attain better speech recognition in the last decade. Such hearing aids incorporate an electrode array implanted inside cochlear (i.e., the electric stimulation) and a traditional acoustics-based hearing aid in …
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FORWARD AND INVERSE MODELS IN ELECTRONEUROLOGY (SPINAL STIMULATION, NEUROGRAPHY, CIRCULAR LIMB, NEUROLOGY, ELECTROPHYSIOLOGY)
Understanding the behavior of electric fields in animal tissues is essential to a number of clinical topics, including electric stimulation of nerves or muscles, and sensing of nerve potentials for diagnostic purposes. These applications represent, respectively, the so-called "forward" and …
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Electro-anatomical models of the cochlear implant
… structures. Because of the complex geometric electrical properties of the tissues found in the implanted ear, demonstrating the impact of pathological variability on neuronal excitation, and ultimately on behavioral performance, will likely require a detailed representation of the peripheral …
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Engineering and acute physiological testing of a retinal neurostimulator
Electrical stimulation of retinal neurons is known to elicit visual sensations. When applied to the retina in a spatial pattern, electrical stimulation may be capable of providing rudimentary patterned vision that may be of benefit to sufferers of degenerative retinal disorders. No such device has …
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Cardiovascular effects of a low and a high dose of fentanyl in the isoflurane anesthetized dog: the influence of the anesthetic-sparing effect and the correction of bradycardia
… (MAC) was determined in these dogs via a 30 mA electric stimulation both before and after administration of a low (loading dose 30 µg/kg, continuous rate infusion (CRI) of 0.2 µg/kg/minute) or high (loading dose 90 µg/kg, CRI 0.8 µg/kg/min) dose of fentanyl. A 7-day washout was observed between …
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Advancing Electrical Stimulation: Full-Head MRI Segmentation for Abnormal Brain Anatomy with tDCS
… the effectiveness of transcranial direct current stimulation (tDCS) is essential for guiding its integration into therapeutic and performance-enhancement applications. In our laboratory, we investigate the efficacy of tDCS across multiple experimental models, including both animal and human …
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Effect of Electrode Size, Shape, and Placement on Electrical Current and Subject Comfort During Electrical Stimulation
… stimulating electrodes during the application of electrical stimulation (ES) to the biceps, quadriceps, and tibialis anterior muscles. Subjects were recruited to allow for diversity in age, sex, and skin pigmentation. Subjects sat in a custom designed multi-positional chair, which allowed precise …
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Toward the Optimal Waveform for Electrical Stimulation
<p>Electrical stimulation (ES) is used to strengthen muscle, improve abnormal tone, and improve the healing rate of pressure sores. Four male and three female research subjects received four minute bouts of electrically stimulated isometric contractions equal to 10% of the maximal voluntary …
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