Copyright ©Mark Nelson, 2002. All rights reserved.
Chapter 14: Somatic and Other Senses
What you need to know

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

Describe the peripheral and CNS pathway that carries  tactile information from your fingertip to your cortex?  (p. 334-335)

Describe the peripheral and CNS pathway that carries pain information from your fingertip to your cortex?  (p. xx-xx)
Which of the two pathways generally has faster conducting axons?  (p. 335)

Describe the receptor endings of temperature and pain receptors?  (p.336-337)

Describe the receptor ending of a Pacinian corpuscle? What does it respond to ?  (p. 339-341)

What happens when you remove the capsule from the end of a Pacinian corpuscle?  (p. 341, Fig. 14-4)

In addition to the skin, where else are Pacinian corpuscles  found ?  (p. 340)

What are some other types of proprioceptors associated with tendons and muscles?  (p. 340)

What are two ways in which pain information can be modulated in the spinal cord?  (p. 342-343)

What are some of the key organizational features of primary somatosensory cortex?  (p. 346-347, also Figs. 9-16, 9-17)

What are the major chambers of the vertebrate inner ear? What type of stimuli does each region process?  (p. 348-351)

What is a macula(p. 349)

What are otoliths?  (p. 349-350)

What is the cupula(p. 350-351)

What is the difference between a passive and an active electric sense ?  (p. 354-355)

What two broad categories of functions are assocatied with an active electric sense?  (p. 355)

What kind of sense organs are associated with the passive electric sense? with the active electric sense?  (p. 355, Fig. 14-16)

What are the first two stages of electrosensory processing in the CNS?  How are they organized (p. 356-357)

What organisms have been shown to have a magnetic sense?  (p. 357-358)