Aside from these major receptors, there are three other touch and pressure senses that include:

Free nerve endings - common in epithelial tissues and their free ends branch and extend between epithelial cells. Free nerve endings are responsible for the sensation of itching.

Tactile corpuscles - also known as Meissner's corpuscles, these are small oval masses of flattened connective tissue in connective tissue sheaths. Two or more sensory nerve fibers branch into each corpuscle and end in tiny knots. They are found in hairless areas of skin such as the lips or fingertips and respond to the motion of objects that are barely in contact with the skin.

Lamellated corpuscles - Also known as Pacinian corpuscles, these are large structures composed of connective tissue fibers and cells with a single sensory nerve fiber branch extending into each. Found in the deeper dermal and subcutaneous tissues, muscle tendons, and joint ligaments.

The body has two types of temperature receptors. These include:

Warm receptors - Most sensitive to temperatures above 77 degrees Fahrenheit and become unresponsive at temperatures above 113 degrees Fahrenheit. Temperatures approaching this 113 degrees or going above it stimulate pain receptors.

Cold receptors - Most sensitive to temperatures below between 50 and 68 degrees Fahrenheit. Temperatures near or below 50 degrees can stimulate pain receptors.

Pain receptors are widely distributed throughout the skin and internal tissues. These receptors protect the body because they are stimulated by tissue damage and the body's response to it is to remove the stimulation.

Pain receptors do not adapt very much. Once a receptor is activated, impulses are sent to the central nervous system for a period of time. This results in the persistence of pain.

Among pain receptors are acute pain fibers and chronic pain fibers.

Acute pain fibers are myelinated and conduct impulses rapidly. They are often associated with the sensation of sharp pain, thus receiving the title acute.

In contrast, chronic pain fibers are unmyelinated and conduct impulses more slowly. This results in a dull, aching sensation that is prolonged and diffuses, making it difficult to pinpoint. Chronic pain continues long after the original stimulus has faded and is usually felt in the deeper tissues.