1Listen to the audio lecture while viewing these slides1Psychology 372Physiological PsychologySteven E. Meier, Ph.D.Feedback Loops/Control Systems2Psyc 372 – Physiological PsychologyOverview• Is often associated with the concept of motivation• Are designed to keep the body at balance.• Are invo lved in many systems•Hunger•Thirst•Endocrine• Kinesthetic (Movement)• Temperature•Others3Psyc 372 – Physiological PsychologyExample of a Control SystemSet Point+-ControlSystemFeedbackDetectorControlling ElementsEndocr ineBehav ioralAutonomic4Psyc 372 – Physiological PsychologySet Points• Are desired values within a system• Are designed to keep you at some level.•Examples•Temperature•Body Weight•Water balance5Psyc 372 – Physiological PsychologyError Detector• Generates a signal that the value of a controlled variable does not match the Set Point.• Then drives the systems (controlling elements) that adjust to some desired direction.• Is controlled by both internal and external stimuli6Psyc 372 – Physiological PsychologyControlling Elements• Are systems that make changes after being cued by the error detector.•Systems can be • Endocrine•Behavioral• Autonomic27Psyc 372 – Physiological PsychologyControlled System• Is the system that makes the changes8Psyc 372 – Physiological PsychologyFeedback Detectors• Identify the changes that have occurred.• Indicates changes have occurred• If at set point, homeostatic balance has reoccurred.• If not, need to do something more.9Psyc 372 – Physiological PsychologyMotor Control System• Similar to other systems• Have motor systems that send information to muscles.• Stimulatory (contract)• Inhibitory (relax)10Psyc 372 – Physiological PsychologyMuscles have Sensory Receptors• Sends information back to spinal cord• Internuncial neurons send information to opposing neurons in the final common pathway• Sends information to the brain• Goes to sensory areas, cerebellar areas, other areas• Allows for fine motor control11Psyc 372 – Physiological PsychologyConclusion• Many types of feedback loops• Are specific to each system• Are extremely important for control and
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