Lecture26 - BioNB222 Cornell University Spring 2008 Carl D....

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BioNB222 Spring 2008 Cornell University Carl D. Hopkins 1 effector sensor controller compare set point + + + + - cdh Lecture 26. Sensory Motor Integration Reading Assignment Purves et al., (2007) Neuroscience. 4 th ed. Sinauer Associates, Sunderland. Visceral motor control: (pp. 534-7); muscle control (408-414), gaze control and the vestibular-ocular reflex (pp. 344 (box), pp. 351-360), (486-489) eye movements, pp 495-501. Modifiable efference copy: TBA on website. Learning Objectives 1) Understand the role that sense organs play in homeostasis -- the maintenance of constant conditions under varying environmental conditions through the action of negative feedback. 2) Be able to cite several examples of negative feedback in homeostatic systems controlled by the nervous system. 3) Understand the need for adjustment of the “gain” of a negative feedback control system in order to compensate for varying conditions. 4) Be able to give examples where the gain of a feedback system is adjusted by the nervous system. 5) Understand the principle of reafference: the generation of sensory responses as a result of a motor action. 6) Understand different strategies for removal of reafference. a. Inhibition by a corollary discharge. b. Efference copy. c. Modifiable efference copy. Lecture Outline 1) The nervous system plays a critical role in homeostasis . Motor systems of various types initiate actions that control muscles, glands and organs which are part of a complex homeostatic systems. Sensory systems monitor the internal
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This note was uploaded on 04/30/2008 for the course BIO 2220 taught by Professor Hopkins,c.d. during the Spring '08 term at Cornell University (Engineering School).

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Lecture26 - BioNB222 Cornell University Spring 2008 Carl D....

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