What is tonotopic organization quizlet?
Tonotopic organization. The systematic mapping of. sound frequency to the place of maximum stimulation. within the auditory system that begins in the cochlea and is preserved through the auditory cortex.
What does the Tonotopic map represent?
Tonotopic organization expresses gradients in the representation (maps) of sound properties. Such properties are frequency of tones, frequency ratios between harmonics and the pitch of complex sounds, speed and direction of frequency sweeps, sound intensity and location of sound in space.
What is tonotopic theory?
Place theory is a theory of hearing that states that our perception of sound depends on where each component frequency produces vibrations along the basilar membrane. The place theory is usually attributed to Hermann Helmholtz, though it was widely believed much earlier.
What causes tonotopic organization?
High frequency sounds stimulate neurons at the base of the structure and lower frequency sounds stimulate neurons at the apex. This represents cochlear tonotopic organization.
What does tonotopic organization mean?
Tonotopic organization means that cells responsive to different frequencies are found in different places at each level of the central auditory system, and that there is a standard (logarithmic) relationship between this position and frequency. Each cell has a characteristic frequency (CF).
What is the relationship between the basilar membrane and tonotopic organization?
What is the relationship between the basilar membrane and tonotopic organization? the basilar membrane is organized tonotopically – meaning each segment has a frequency of greatest sensitivity. essentially the 4 main tonotopic areas move from closest to the oval window (high frequency) to farthest away (low frequency).
What is Heschl’s gyrus?
Heschl’s gyrus, also known as transverse temporal gyrus, is part of the temporal lobe and contains the primary auditory cortex (Brodmann area 41). It is entirely hidden within the Sylvian fissure, with the planum temporale and superior temporal gyrus located lateral to it.
What is the tonotopic organization?
What is the problem with the place theory?
The biggest problem of the place theory is that it fails to identify the pitch of a stimulus with missing fundamental. According to Helmholtz’s theory, it is impossible to perceive a pitch when there is no spectral peak at the position along the basilar membrane which corresponds to the frequency of the pitch.
What is the organ of Corti?
The Organ of Corti is an organ of the inner ear located within the cochlea which contributes to audition. The Organ of Corti includes three rows of outer hair cells and one row of inner hair cells. Vibrations caused by sound waves bend the stereocilia on these hair cells via an electromechanical force.
Why is the cochlea important?
The cochlea (auditory inner ear) transforms the sound in neural message. The function of the cochlea is to transform the vibrations of the cochlear liquids and associated structures into a neural signal.
What is the role of cochlea?
When does tonotopic organization occur in the cochlea?
Tonotopic organization in the cochlea forms throughout pre- and post-natal development through a series of changes that occur in response to auditory stimuli.
Which is the best definition of tonotopic organization?
TONOTOPIC ORGANIZATION. the basic standard postulating that various frequencies arouse various places in mammalian auditory system structures.
Where does tonotopy occur in the human brain?
Tonotopy—the organization of sound frequencies along an axis—is evident in the basilar membrane of the cochlea and all brainstem and central auditory centers (reviewed in Appler and Goodrich, 2011 ).
How are the hair cells in the cochlea supported?
As for the inner hair cells, they are supported by the surrounded support cells. Auditory nerve fibers also play an important role in auditory pathway. They provide synaptic connections between the hair cells of the cochlea and the cochlear nucleus within the brainstem.