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  2. Threshold potential - Wikipedia

    en.wikipedia.org/wiki/Threshold_potential

    The threshold value controls whether or not the incoming stimuli are sufficient to generate an action potential. It relies on a balance of incoming inhibitory and excitatory stimuli. The potentials generated by the stimuli are additive, and they may reach threshold depending on their frequency and amplitude.

  3. Biological neuron model - Wikipedia

    en.wikipedia.org/wiki/Biological_neuron_model

    that depends on the momentary difference between the membrane voltage V at time and the threshold . [55] The function F is often taken as a standard sigmoidal F ( x ) = 0.5 [ 1 + tanh ⁡ ( γ x ) ] {\displaystyle F(x)=0.5[1+\tanh(\gamma x)]} with steepness parameter γ {\displaystyle \gamma } , [ 46 ] similar to the update dynamics in ...

  4. Sensory threshold - Wikipedia

    en.wikipedia.org/wiki/Sensory_threshold

    In measuring sensory threshold, noise must be accounted for. Signal noise is defined as the presence of extra, unwanted energy in the observational system which obscures the information of interest. As the measurements come closer to the absolute threshold, the variability of the noise increases, causing the threshold to be obscured. [5]

  5. Receptor potential - Wikipedia

    en.wikipedia.org/wiki/Receptor_potential

    A receptor potential, also known as a generator potential, [1] a type of graded potential, is the transmembrane potential difference produced by activation of a sensory receptor. [2] A receptor potential is often produced by sensory transduction. [3] It is generally a depolarizing event resulting from inward current flow.

  6. Neural coding - Wikipedia

    en.wikipedia.org/wiki/Neural_coding

    Neural coding (or neural representation) is a neuroscience field concerned with characterising the hypothetical relationship between the stimulus and the neuronal responses, and the relationship among the electrical activities of the neurons in the ensemble.

  7. Psychophysics - Wikipedia

    en.wikipedia.org/wiki/Psychophysics

    Psychophysics quantitatively investigates the relationship between physical stimuli and the sensations and perceptions they produce. Psychophysics has been described as "the scientific study of the relation between stimulus and sensation" [1] or, more completely, as "the analysis of perceptual processes by studying the effect on a subject's experience or behaviour of systematically varying the ...

  8. Action potential - Wikipedia

    en.wikipedia.org/wiki/Action_potential

    Nearly all cell membranes in animals, plants and fungi maintain a voltage difference between the exterior and interior of the cell, called the membrane potential. A typical voltage across an animal cell membrane is −70 mV. This means that the interior of the cell has a negative voltage relative to the exterior.

  9. Absolute threshold - Wikipedia

    en.wikipedia.org/wiki/Absolute_threshold

    A WaveTek stimulator was used to measure absolute threshold of touch by "tapping" a participant's finger pad with a 2 mm diameter probe. Lindblom found that on average, there was a 27% difference in threshold level between slow and fast mechanical pulses on a participant's finger pad. [21]