Of the various cutaneous discriminative mechanoreceptors, Merkel's disks are the best at signalling fine detail of a stimulus because

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They have the most number of terminal branches for an individual neuron.

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They have the lowest sensitivity of the terminal branches.

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They are densest at the fovea and the number decreases at other skin surfaces.

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They can respond to raised dots moved across the skin whereas the other receptors cant.

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They have the smallest receptive fields.

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