I think it is the Brain....
The fingertips have a greater concentration of sensory receptors compared to the palms of the hands. This is why our fingertips are more sensitive to touch and able to detect fine details such as texture and temperature with precision.
The sensory receptors for smell are referred to as olfactory receptors.
somatic receptors and special receptors
There are five main types of sensory receptors found on the human head: mechanoreceptors for touch and pressure, thermoreceptors for temperature, nociceptors for pain, chemoreceptors for taste and olfaction, and photoreceptors in the eyes for light.
The dermis layer of the skin is composed of thousands of sensory receptors, including touch receptors, temperature receptors, and pain receptors. These receptors help you to feel sensations and respond to your environment.
Sensory receptors enable you to respond to stimuli in the environment of an organism. Some sensory receptors respond to taste and smell while others respond to physical stimuli.
The eyes, nose, skin and tongue HAVE sensory receptors.
The fingertips have the highest density of sensory structures, such as touch receptors and nerve endings. This high concentration of sensory structures allows for precise discrimination of touch and texture.
It all depends on the sensory receptors affected by continuous stimulus applied. It can cause complete damage to the receptors and or prevent them from receiving the correct signals.
Ragnar Granit has written: 'Sensory mechanisms of the retina' 'Receptors and sensory perception' -- subject(s): Electrophysiology, Sensory Receptors
The sensory receptors for the eyes are the optic nerve and the retina. The sensory receptor for the nose are the olfactory nerves.
Adaptation of sensory receptors refers to the way in which our senses changed under different circumstances and stimuli.