What determines the intensity of a stimulus?
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Download references What is important for determining stimulus intensity?It is determined by receptive field size and receptor density. There is an inherent paradox between the intensity of a stimulus and the ability to localize it.
What is intensity of stimulus?Stimulus intensity is the strength of the sensory input to the brain. A stimulus has a threshold, or minimum degree of intensity needed for it to be detected and acted upon. For example, there is a minimum threshold for being able to hear something.
How do sensory receptors detect the intensity of a stimuli?The intensity of the stimulus is encoded by the frequency of the action potentials. 5. Most receptors detect the stimulus via a subset of highly specialised ion channels which open (Na+) or close (K+) to evoke depolarisation of the membrane of the sensory ending in response to the stimulus. 6.
How does the brain detect intensity of a stimulus from nervous impulses?The nervous system detects changes in our environment (known as stimuli) through cells called receptors. Receptors are sensitive to a number of different aspects of our environment, such as light, pressure (touch) and chemicals in the air (smell).
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