PSYC 3322 1st Edition Lecture 14 Outline of Last Lecture II. Functional Anatomy of the Visual SystemIII. Neuronal ActivityOutline of Current Lecture IV. Sound Waves: Stimulus for AuditionV. Functional Anatomy of Auditory SystemCurrent LectureSound Waves: Stimulus for AuditionSound waves are created when changing pressure causes the undulating displacement of molecules.Compression causes molecules to move inward. This all results in changes in sound waves. The Three Properties of Sound-Wave Energy: Frequency, amplitude, and complexity.- Amplitude- intensity of sound stimulus. Decibels.- Complexity- mixture of frequencies in a sound.Functional Anatomy of Auditory SystemWaves enter the ear drum- Vibration of ossicles- Vibrations go to the oval window- FluidsCochlea- The chambers inside are filled with fluid- The movement of fluid causes movement of the different membranes (Tectorial and Basilar) and hair cells- Tectorial moves over hair cells- Hair cells mechanically displaced, fired up- StimulationThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Cilia of outer hair cells bend- Causes neural activityTwo pathways in auditory system- One identifies objects by sound characteristics- One directs our movements based on sounds we hearHerschel’s gyrus- Deep in brainWernicke’s area- Language- Understanding of
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