PS263 Chapter Notes - Chapter 7: Auditory Cortex, Basilar Membrane, Oval Window
Document Summary
Structure of the ear: pinna: the outer ear structure of flesh and cartilage that sticks out from each side of the head. Helps to locate the source of a sound: tympanic membrane/ eardrum: middle ear. Vibrates at the same frequency as the sound waves that strike it. Connects 3 tiny bones that transmit the vibrations to the oval window: oval window: a membrane of the inner ear, cochlea: small snail-shaped structure in the inner ear, hair cells: auditory receptors. Primary auditory cortex: area in the superior temporal cortex in which cells respond best to tones of a particular frequency. Most hearing impaired people respond slightly to loud noises. Nerve deafness produces tinnitus: frequent or constant ringing in ears. Humans localize low frequencies by phase differences and high frequencies by loudness differences. Mechanical senses respond to pressure, bending, or other distortions of a receptor; include touch, pain and other body sensations, and vestibular sensations.
