Copyright ©Mark Nelson, 2002. All rights reserved.
Chapter 10: The Coding and Control of Sensory Information
What you need to know

(exam questions will be a drawn from this subset of material)

How is information about stimulus strength usually encoded by sensory afferents?   (p. 234-235)

How does the coding of stimulus strength differ for tonic and phasic sensory afferents? (p. 234-235)

How are other qualities of the stimulus (e.g. position, wavelength, frequency, etc.) encoded by sensory afferents?  (p. 235-237)

What are some neurobiological examples of a labeled line code?  (p. 236-237)

What are some neurobiological examples of an across-fiber (population) code?  (p. 238-240)

What does it mean for a sense organ to be under efferent control?  (p. 243)

What functional benefits are derived from efferent control of sense organs ?  (p. 243)

What are muscle spindle organs?  (p. 244-245)

What are extrafusal and intrafusal muscle fibers; which ones are muscle spindle organs associated with?  (p. 244-245)

What is the functional role of muscle spindle organs?  (p. 245-248)

What is sensory reafference?  (p. 249-250)

How does efferent control influence sensory reafference?  (p. 249-250)

What is an example of efferent control in protecting a sense organ from physical damage?  (p. 250)

What is an example of efferent control in selective suppression of sensory input?  (p. 250-251)