2014 Somatosensation

Lecture Objectives

At the end of this lecture, you should be able to:

  1. Define somatosensation, and be able to distinguish it from proprioception.

  2. Compare and contrast the characteristics of thermo-, mechano- and noci-ceptors (stimuli, receptor types, location, receptive field size, adaptation), including what is known about the gating of the channels involved.  In particular, be able to identify the adequate stimuli for nociceptors.  Describe the nature of the currents that flow through TRP channels.  Define point localization and two point discrimination, and explain which parts of the body have the greatest acuity, and why.

  3. Compare and contrast the conduction velocity of discriminative touch and nociceptive information.

  4. Explain the temperature illusion!

  5. Contrast the three types of pain.  Define referred pain, and explain why it is perceived.

  6. Diagram the gate theory of pain, including the actions of the endogenous opiate system. Explain the success of TENS by using gate theory.

Email: Dr. Janet Fitzakerley | ©2014 University of Minnesota Medical School Duluth | Last modified: 5-feb-14 10:04 PM