Chapter 3.2 Flashcards
What information is derived from sensation?
- Afferent
- Movement-produced feedback
- exteroception
- proprioception
What is afferent information?
Information used to regulate movement
What is movement produced feedback?
information resulting from movement
What is exteroception?
information from outside the body
What is proprioception?
Information from inside the body
What is closed-loop control?
A type of control that involves the use of feedback and the activity of error detection and correction processes to maintain the desired state; used to control slow, deliberate movements.
In the closed-loop control model, what is a task goal maintained by?
feedback
error detection
error correction
What component of the closed loop control system determines actions necessary to maintain the desired goal state?
the executive component
What component of a control system carries out the desired action?
The effector
What provides information from the various sensors about the current state?
feedback
What is the error-detection mechanism contained in the closed-loop system that compares the desired state to the feedback of the actual state?
the Comparator
Who founded the closed loop theory?
Jack Adams
What skills does closed-loop control work best for?
Continuous - time to provide feedback
Can closed loop control work for a batter trying to hit a ball?
Sometimes
How long is reaction time?
160-190msec for skilled athlete
200-250msec for average
What are the latencies of correction for each MSR?
M1: 30-50msec
M2: 50-80msec
M3: 120msec +
What is the latency for M1 response?
30-50msec
What is the latency for M2 response?
50-80msec
What is the latency for M3 response?
120 + msec
What occurs during the M1, monosynaptic stretch reflex?
1) muscle stretched
2) 1a afferent nerve fires
3) signals alpha motor neurons in muscle (single synapse
4) same muscle contracts (autogenetic)
What occurs in the M2, Long Loop Reflex?
1) muscle stretched
2) 1a Afferent fires
3) signals to higher centers
4) back to alpha motor neuron
5) same muscle activates
What is a triggered reaction?
A relatively complex, coordinated reaction to a particular stimulus, with a latency of 80-120ms. Flexible, yet faster than the M3 response.
What is the M3 response called?
The voluntary reaction time response
What is the latency for the triggered reaction response?
80-120msec
What are the four essential components of any closed loop control system?
Executive
Effector
Feedback
Comparator
