Author: Christopher M. LeePublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Encoding of Shape and Repetition Rate in the Rat Auditory Cortex
Encoding of Sound Shape in Rat Auditory Cortex
Author: Ahmad OsmanPublisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages :
Book Description
Mammals discriminate temporal “shape†cues in speech and other sounds but the underlying neural pathways and mechanisms remain a mystery. Shape cues include the rising and falling slopes and the duration of change in the sound envelope amplitude over time and are critical for sound perception. The auditory cortices are essential for behavioral discrimination of temporal cues and yet the neural mechanisms underlying this ability remain unknown. Primary (A1) and ventral non-primary auditory cortical fields (VAF SRAF) are physiologically and anatomically organized and specialized to represent distinct spectral and spatial cues in sound. The current study investigates cortical field differences for encoding envelope shape in sound. In the present study, we ask whether A1, VAF and SRAF could utilize spike rate, distinct temporal spiking patterns, including onset and sustained components, to discriminate sound shape. To address these questions we computed a discrimination index based on the spike distance metric. We find response durations and optimal time constants for discriminating sound shape increase in rank order with: A1
Distinct Temporal and Special Components of Developmental Plasticity in Rat Auditory Cortex
Author: Theodore M. MoallemRule-encoding Neurons in Prefrontal and Auditory Cortex of Rats Performing a Task Similar to the Cocktail Party Problem
Author: Christopher RodgersPublisher:
ISBN:
Category :
Languages : en
Pages : 88
Book Description
The human auditory system easily solves the "cocktail party problem"--That is, even when multiple people are speaking at once, we can easily select and pay attention to a single voice while ignoring the others. Though this seems easy to do, the problem is known to be quite computationally complex. It requires identifying the important sound, selecting it for special processing, and using information from it to make behavioral decisions; meanwhile, the other voices must not be allowed to distract us. How does the brain do this? In chapter 1, I review previous approaches to this question and motivate the choices I made in designing my experiments. In chapter 2, I present the data and conclusions I obtained in collaboration with my advisor, Dr Michael DeWeese. (We are submitting this chapter for publication separately.) In chapter 3, I present a detailed protocol for repeating our behavioral results. The final chapter, Chapter 4, is broader in scope. I discuss how our models and results relate to existing models of prefrontal control over other brain regions. Finally, I consider what my results have taught me about the scientific process of investigating neural function and ruminate on where this field may be headed next.
Encoding of Ultrasonic Communication Signals in Rat Auditory Cortex
Author: Isaac Michael CarruthersPublisher:
ISBN:
Category :
Languages : en
Pages : 204
Book Description
All social animals require a means of communication, and for many species that need is filled by the use of vocalizations. While far less intricate than human speech, many animals employ systems of vocalizations in order to attract mates, convey information about the environment, or to express an emotional state. One such animal is the rat, which communicates via a set of ultra-sonic vocalizations (USVs) in the 50kHz frequency range. These USVs have a conveniently simple structure, making them easy to synthesize and modify. The rat thus provides an excellent model system with which to probe the processing and encoding of such communication signals in the mammalian brain.
The Auditory Cortex
Author: Jeffery A. WinerPublisher: Springer Science & Business Media
ISBN: 1441900748
Category : Science
Languages : en
Pages : 711
Book Description
There has been substantial progress in understanding the contributions of the auditory forebrain to hearing, sound localization, communication, emotive behavior, and cognition. The Auditory Cortex covers the latest knowledge about the auditory forebrain, including the auditory cortex as well as the medial geniculate body in the thalamus. This book will cover all important aspects of the auditory forebrain organization and function, integrating the auditory thalamus and cortex into a smooth, coherent whole. Volume One covers basic auditory neuroscience. It complements The Auditory Cortex, Volume 2: Integrative Neuroscience, which takes a more applied/clinical perspective.
Descending Control in the Auditory System
Author: David Pérez-GonzálezPublisher: Frontiers Media SA
ISBN: 2889762181
Category : Science
Languages : en
Pages : 285
Book Description
Representation of the Interaural Level Difference Cue in Auditory Cortex of the Rat
Author: Nathan C. HigginsCumulated Index Medicus
Author: Inferior Colliculus Microcircuits
Author: Manuel S. MalmiercaPublisher: Frontiers Media SA
ISBN: 2889193853
Category : Neurosciences. Biological psychiatry. Neuropsychiatry
Languages : en
Pages : 485
Book Description
Nothing provided