The effects of passive familiarization on neural and behavioral discrimination of acoustic signals
Başlık çevirisi mevcut değil.
- Tez No: 589181
- Danışmanlar: DR. DAVID S. VICARIO
- Tez Türü: Doktora
- Konular: Psikoloji, Psychology
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2018
- Dil: İngilizce
- Üniversite: Rutgers, The State Unıversıty Of New Jersey-New Brunswıck Campus
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
Özet yok.
Özet (Çeviri)
Organisms encounter numerous novel sensory signals throughout life. Thus, sensory representations in the adult brain, set up during ontogeny through the interaction of early experience with innate organizational principles, must undergo dynamic changes to adapt to the complexity of the external world. This thesis investigates how passive exposure to novel sounds modifies neural representations to facilitate recognition and discrimination, using the zebra finch model organism. Zebra finches use complex, learned acoustic signals for social communication with many parallels to human speech. Furthermore, the neural responses in an auditory structure in the zebra finch brain, Caudal Medial Nidopallium (NCM), undergo a long-term form of adaptation with repeated stimulus presentation, providing an excellent substrate to probe the neural underpinnings of adaptive sensory representations. In Experiment 1, electrophysiological activity in NCM was recorded under passive listening conditions as novel natural vocalizations were familiarized through playback. Neural decoding of stimuli using the temporal profiles of both multi-unit and single-unit neural responses improved dramatically during the first few stimulus presentations. During subsequent encounters, these signals were successfully recognized after hearing fewer initial acoustic features. Remarkably, the accuracy of neural decoding was higher when different stimuli were heard in separate blocks compared to when they were presented randomly in a shuffled sequence. Experiment 2 supported and extended these findings by showing that the rapid gains in neural decoding of natural vocalizations with passive familiarization were long-lasting, maintained for 20 hours after the initial encounter. Experiment 3 investigated how the degree of acoustic similarity between sounds related to these rapid dynamic changes in stimulus representations, using synthesized vocalizations that vary parametrically along a single dimension. Single-unit responses demonstrated that rapid differentiation of the temporal profiles of neural responses to different signals were more pronounced for stimulus pairs that are acoustically less similar to each other, although these results were mixed for multi-unit responses. Finally, in Experiment 4, the effects of passive familiarization on subsequent behavioral discrimination of two acoustically similar synthesized vocalizations were investigated. Surprisingly, this experiment did not indicate an effect of pre-exposure on behavioral responses. Taken together, the experiments in this thesis provide valuable insights into the mechanisms by which the nervous system dynamically modulates sensory representations to improve discrimination of novel complex signals over short and long time-scales. Similar mechanisms may also be engaged during processing of human speech signals, and thus may have potential translational relevance to elucidate the neural underpinnings of speech perception and comprehension difficulties.
Benzer Tezler
- Erkek sporcularda flywheel eksantrik ve geleneksel kuvvet antrenmanlarının güç çıktılarına akut etkisi: Post-aktivasyon potansiyeli yaklaşımı
Acute effects of flywheel eccentric and traditional strength training on power output in male athletes: Post-activation potentiation approach
MERT ARABACI
Yüksek Lisans
Türkçe
2026
SporBursa Uludağ ÜniversitesiBeden Eğitimi ve Spor Ana Bilim Dalı
DR. ÖĞR. ÜYESİ HÜSEYİN TOPÇU
- Kadın voleybolcularda antagonist kasa yapılan statik germenin alt ekstremite güç çıktısına etkisi
Effects of static stretching applied to antagonist muscles on lower extremity power output in female volleyball players
GENÇER YARKIN
Yüksek Lisans
Türkçe
2019
SporEge ÜniversitesiSpor Sağlık Bilimleri Ana Bilim Dalı
DOÇ. DR. MEHMET ZEKİ ÖZKOL
PROF. DR. HAYRİYE SELDA YÜCEL
- The effects of passive solar energy systems on the thermal performance of residential buildings; an analysis using ENERGY-10
Meskenlerde edilgen güneş enerjisi düzeneklerinin ısıl performansa etkisi;“ENERGY-10”ile bir analiz
ÖMER TUĞRUL KARAGÜZEL
Yüksek Lisans
İngilizce
2003
MimarlıkOrta Doğu Teknik ÜniversitesiMimarlık Ana Bilim Dalı
YRD. DOÇ. DR. SOOFİA TAHİRA ELİAS ÖZKAN
- The effects of passive and active street interfaces on users' perceived safety
Pasif ve aktif sokak arayüzlerinin kullanıcıların güvenlik hissi üzerindeki etkileri
LUJAIN ZAIBAK
Yüksek Lisans
İngilizce
2023
Mimarlıkİstanbul Teknik ÜniversitesiKentsel Tasarım Ana Bilim Dalı
DOÇ. DR. DİLEK YILDIZ ÖZKAN
- The effects of syntactic priming on Turkish English bilinguals' production of passive sentences
Türkçe İngilizce iki dillilerin edilgen tümce üretiminde sözdizimsel hazırlamanın etkileri
SENA ARMAN ERGİN