Flashcards in Chapter 17 - information processing in motor learning Deck (40)
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1
CNS = ________
control center
2
_____ = the part of the nervous system that connects with the rest of the body
PNS
3
another name for a nerve cell is?
neuron
4
_____ is the fundamental functional and structural unit of the nervous system
neuron
5
what does the neuron allow for?
allows information to travel throughout the body to various destinations
6
what part of the neuron receives the message?
dendrites
7
the ______ (of the neuron) transmits message to terminal ending
axon
8
the _____ (of the neuron) sends the message to adjacent neuron
terminal ending on muscle
9
what is the myelin sheath?
fatty covering or insulator of the neuron
10
what does skipping impulses allow for?
faster conduction
11
what are the 3 types of neurons?
1) afferent neurons
2) interneurons
3) efferent neurons
12
afferent neurons
sensory & carry signals to the brain
13
interneurons
- originate and terminate in CNS
- connect afferents and efferents in CNS
14
efferent neurons
motor & carry signals from the brain
15
what do neural impulses do?
transport the information necessary for all activities we carry out
16
what is the language of the nervous system?
neural impulses
17
the synapse and synaptic transmission differ in terms of what 2 things?
1) neurotramitter used (e.g., acetylcholine or Ach)
2) general function (e.g., inhibitory or excitatory)
18
what is the "all or none" law
synaptic transmission causes action potential when its strength is above a minimum threshold level. when the strength is below threshold level there i no action potential
19
true or false: action potential is always the same intensity regardless of the strength of synaptic transmission above the threshold level
true
20
true or false: the action potentials intensity changes along the nerve fiber
FALSE: the action potentials intensity remains constant along the nerve fibre
21
what are the 3 information-processing stages?
1) stimulus-identification stage
2) response-selection stage
3) response-programming stage
22
stimulus-identification stage
-sensing environmental information
- exteroceptors
- proprioceptors
- representation of stimulus and its nature
23
response-selection stage
-translation from perception to response in the form of a motor program
24
response-programming stage
- organizing the selected movement
- retrieve motor program
- command correct muscles
- choose appropriate force
- choose appropriate timing, etc.
25
what happens as we execute movements?
the receptors in our bodies continually update the CNS about the nature of our actions
26
what does the efficiency of motor control by the information-processing system depend on?
feedback
27
closed-loop control
follows the idea that movements may be planned and adjusted by feedback even during a movement
28
closed-loop control process is _____ and will continue to maintain the desired movement of the performed
self-regulating
29
the are 3 key elements of the closed-loop control
1) feedback
2) error detection
3) error correction
30
analogy of closed-loop control
thermostat
31
what are 4 advantages of the closed-loop system?
1) new skills
2) activities requiring precision and accuracy
3) allows adjustment according to the situation
4) adds versatility to movements
32
what are 2 disadvantages of the closed-loop system?
1) rapid, discrete actions do not properly fall under closed-loop control
2) demands attention and time
-feedback must pass through the processing stage
33
open-loop control
describes control of automatic actions
34
when are movements structured in open-loop system?
movements may be structured in advance, enabling them to run off automatically when initiated
35
what are the 2 main components of the open-loop system?
1) the executive
2) the effector
36
executive
-chooses motor program
-relays instruction
37
effector
-carries out specific instructions automatically
38
what are 3 advantages of the open-loop system?
1) fast and forceful movements can be produced without extensive conscious control
2) attention can be diverted to other responses
3) does not demand as much time because there is no feedback
39
what are 2 disadvantages of the open-loop system?
1) not as effective in unstable and less predictable situations
- movements may not be determined effectively in advance
2) not effective in precise and complex actions
40
