Feedback of Biological Systems Specifically Humans Ryan Bussis Samuel Stearley

Introduction Tracking Balance Movement: Walking/Swimming Modeling

Vestibular Sensors in Ear  These are spaces in the ear filled with a liquid that moves across hairs.  These hairs connect to nerves and feed data to your brain.

Measures Angular Acceleration  Provides feedback so that eyes can focus while the head is moving.  Similar to the model of stabilizing a Video Camera. (Chapter 5) Semi-Circular Canal

Measures Linear Acceleration  Keeps track of the movement of your body.  If your eyes disagree with what vestibular is telling you: Your head explodes.  Specific parts are called Utricle (Horizontal) and Saccule (up-down/forward-backward)

Linkage to the Motor System  The importance of eye sight for balance. - Walking - Driving -Swimming

People can walk in dark  People can keep stability without seeing -Other senses are used  Direction is not known

Straight Lines  Sensors in the back of the eye (Rods and Cones) align a person with straight lines. (Vertical or Horizontal)  Also applies for swimming. You need to have a line to follow.

Driving  If you want to drive straight you need to look far into the distance.  If you look in front or eyes closed you can’t drive straight.

Balance  Eyesight is used to align vertically and tells your brain that you are stable.  Example: Try standing on one leg with your eyes closed.

Modeling

Modeling Continued

Questions?