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Somatic senses

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SOMATIC SENSES ANATOMY

The coetaneous receptors and proprioceptors are the hosts of the somatic senses. The level of stimulus combined with the specific density of the receptors is a key factor in determining the level of perception understood by somatic receptors.

SOMATIC SENSES STRUCTURE

Somatic senses are also sometimes called somesthetic senses. They are born from coetaneous receptors as well as proprioceptors.

Sensations such as touch, tickle, pain, pressure, hot, and cold are considered to be coetaneous sensations, meaning sensations the skin receptors can discern and send to the brain.

The brain’s understanding of information such as the position of body (it is sitting, standing, moving, still, etc?) motion and equilibrium is discerned via proprioceptors within the inner ear. Tactile receptors and pressure receptors share the ability to discern mechanical forces that either distort or displace the affected tissue where they are positioned.



SOMATIC SENSES DIAGRAM

Somatic senses
Image: Somatic Senses


The dermis and hypodermis of the skin are the primary home of tactile receptors, and they can discern sensations such as light or gentle touch. Alternatively, the pressure receptors discern sensations like pressure, stretching, and vibration.

These receptors are most commonly located within the skin’s hypodermis as well as the ligaments or tendons of nearly every joint.
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