Barb, our professor, asked us to post answers to the following questions on our blog, so here they are:
What is a switch?
o Is a mechanical device that closes a electrical circuit to complete the circuit that
replaces any action that a person would normally do
Who uses switches?
o People who have limited or no movement
Why do people use switches?
o Allows people to access devices which they would normally not have access to
List the selection criteria in selecting a successful switch.
o Position
• if the switch is not positioned right, unable to use switch effectively
• OT and PT helps determine this
o Movement Pattern
• requires a consistent, voluntary movement
• key is to select switch to accommodate movement
• person must be able to operate switch with minimal fatigue
o Control Site
• where on body person wants switch to go
• the hand is usually the control site
• more motor involved (uncontrolled movement) a person is, the less likely
that the Control Site is the hand
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