Some Neurons Can Only Generate Action Potentials Up To A Certain Speed, And No Faster. This Fact Is A Limitation Of The ________ Theory Of Pitch Perception. (2023)

FAQs

What does the place theory of perception suggest? ›

The place theory of pitch perception suggests that different portions of the basilar membrane are sensitive to sounds of different frequencies. More specifically, the base of the basilar membrane responds best to high frequencies and the tip of the basilar membrane responds best to low frequencies.

The temporal theory of pitch perception asserts that frequency is coded by the activity level of a sensory neuron. This would mean that a given hair cell would fire action potentials related to the frequency of the sound wave.

Sensory neurons carrying action potentials from pain receptors synapse within the spinal cord with interneurons. These interneurons synapse with motor neurons leading back to an effector and ascending neurons that carry action potentials toward the brain.

Action potentials are typically initiated in the axon initial segment and the propagation of the action potential along the axon allows communication of the output of the cell to its distal synapses.

Most theorists have concluded that both place theory and frequency theory are valid: place theory applies to high-pitched sounds, and frequency theory applies to low-pitched sounds. Both place and frequency theory can be applied to middle-pitched sounds.

There are two broad categories of pitch-perception models: place or spectral models consider that pitch is mainly related to the Fourier spectrum of the stimulus, whereas for periodicity or temporal models its characteristics in the time domain are more important.

Lesson Summary. According to the frequency theory of hearing, the frequency of the auditory nerve's impulses corresponds to the frequency of a tone, which allows us to detect its pitch. Sounds come into the ear as acoustical signals and are later transformed into nerve impulses by the cochlea.

Pitch: The dimension of frequency determined by the wavelength of sound. Frequency theory: The rate of nerve impulses traveling up the auditory nerve matches the frequency of a tone; enabling us to sense its pitch. Best explains how we sense low pitches.

The frequency of a sound wave is the same as that of the source. For example, a tuning fork vibrating at a given frequency would produce sound waves that oscillate at that same frequency. The frequency of a sound is the number of waves that pass a point per unit time.

Chemical Synapses have Two Parts. • Chemical synapses have two parts: an axon terminal of one neuron, and the cell membrane of another neuron. • The neuron conducting an action potential toward the synapse is called the presynaptic neuron.

What response of neurons is called the action potential? ›

These spike-like events are called action potentials, nerve impulses, or sometimes simply spikes. Action potentials are the basic events the nerve cells use to transmit information from one place to another.

Whereas, in a non-myelinated neurone there is no myelin so the action potential has to travel along the whole of the axon. Therefore, the action potential travels faster in the myelinated neurone as the distance it needs to travel along the axon is much less than the distance it travels along a non-myelinated neurone.

Action potentials begin in the axon hillock region of the neuron.

Where in the neuron is an action potential initially generated? Axon hillock. this region (first part of the axon) receives local signals (graded potentials) from the soma and dendrites and has a high concentration of voltage-gated Na+ channels.

An action potential is generated at the hillock and it triggers a series of identical action potentials along the axon to the terminal ends.

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.

According to the place theory of hearing, we can hear different pitches due to specific sound frequencies causing vibrations in specific parts on the basilar membrane of the cochlea. In other words, different parts of the cochlea are activated by different frequencies.

Place theory and frequency theory are theories about audition rather than vision. Place theory states that ear hairs respond to different frequencies based on their different locations in the cochlea, and frequency theory states that pitch is perceived by the rate at which hair cells fire.

Place Theory (Hermann von Helmholtz, 1863) maintains that perception of pitch depends on the vibration of different portions of the membrane formed by the receptive cells of the inner ear. That is, receptive cells in each region of the membrane are specialized for the detection of specific sound frequencies.