From: Spatial and temporal resolution of geographic information: an observation-based theory
Sense | Receptors, Number & Size | References |
---|---|---|
Hearing | eardrum (or tympanic membrane) of the ear; there is one eardrum per ear; the surface area of an eardrum is about 85 mm2 | |
Sight | photoreceptors of the retina; photoreceptors are about 125 million in each human eye; their diameter varies roughly between 2.5 µm and 10 µm | |
Smell | olfactory cilia of the olfactory neuron in the nose; there are about five million olfactory neurons in each nose, each neuron has 8-20 cilia; cilia have a length between 30 and 200 µm | |
Taste | taste buds of the tongue; a human has between 5,000 and 10,000 taste buds; taste stimuli interact with taste buds at a small 2-10 µm region called the taste pore | |
Touch | touch receptors of the skin; there are about 17,000 touch receptors in the human hand; the mean spatial receptive field of touch receptors of type FAI is about 12.6 mm2 |