Neural Tuning and Iso-rate functions Flashcards
What’s on the vertical and horizontal axes of a neural-rate intensity function
x = intensity (dB)
y = firing rate
when no sound is presented, what rate will the neuron fire at?
its spontaneous rate
What relationship do spontaneous relationship and threshold have?
inverse relationship
What does a high or low spontaneous rate mean?
high = fibers get saturated the fastest and have a low threshold
low = have higher thresholds
High levels sounds are recorded by the ________ neurons and sounds near threshold are coded by the ________ rate neurons
- low spontaneous rate
- high spontaneous rate
What does a tuning curve/iso-rate function show (what is the stimulus/recording)
Stimulus: tone that is varied in frequency
recorded from: single neuron
what’s recorded: level resulting in a criterion increase in the firing rate
What is a neural excitation pattern (stimulus/recorded from)
record neural firing rate for a stimulus at a fixed level from a sample of the neural population
stimulus: tone or complex signal fixed in level
recorded from: a sample of the neural population
what’s recorded: firing rate
What is a histogram?
a representation of frequency of distribution by means of rectangles who widths represent class intervals and whose heights represent corresponding frequencies
What are the three types of histograms
Post stimulus: what activity looks like initially when the nerve is stimulated (action potential)
Period: represents the pattern of firing for a single cycle of a stimulus
Interval: represents the time between successive neural firings
What are temporal and Place theories of pitch
Pitch: subjective attribute of frequency
temporal theory: information about stimulus frequency conveyed to the brain by the temporal pattern of neural firing
place theory: information about stimulus frequency conveyed to the brain by tonotopic organization and the peak of displacement of the BM traveling wave
