... for example, heightened pain perception accompanying fear of needles, or lowered pain perception in an injured athlete during a competitive event (Sherwood, 1995). There are three categories of pain receptors: 1) Mechanical nociceptors which respond to mechanical damage such as pinching or cutting. 2) Thermal nociceptors which respond to temperature extremes. 3) Polymodal nociceptors which respond equally to all kinds of damaging ... such as aspirin inhibit the synthesis of prostaglandin's, accounting for the pain relieving properties of such drugs (Sherwood, 1995). Pain starts with the...

• Word Count: 2045
• Approx Pages: 8
• Has Bibliography
• Grade Level: Undergraduate

... system and are responsible for transmitting messages from one part of the body to another. There are three types of neurons, each having a different function; Sensory, transmit impulses received by the nerve endings to the central nervous system. Motor, carry outgoing signals from the brain or spinal cord to other areas of the body and inter-neurons, receive signals from the ... dendrites known as processes. They are stimulated by contact of a noxious stimulant, such as a sharp object touching the foot or changes in pressure and temperature triggering detectors located within the skin. A...

• Word Count: 1030
• Approx Pages: 4
• Has Bibliography
• Grade Level: Undergraduate

... are many receptors in the skin such as free dendritic endings (responds pain and temperature), merkel discs (responds to light touch receptors), root hair plexuses(light touch), meissner's corpuscles (light touch), ruffini's corpuscles (pressure and distortion of the skin) and pacinian corpuscles (deep pressure). These sensory receptors send nerve impulses to the brain which results in a stimulus response. Moreover, gustation and olfaction are ... subject could not feel any vibrations in the left ear, this could be due to the tuning fork not being charged properly and human ears are sens...

• Word Count: 1789
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate