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14 Cards in this Set
- Front
- Back
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What are the two types of strategies for controlling voluntary movements?
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Ballistic and Pursuit
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Describe a ballistic movement?
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Rapid response, based on preprogrammed set of instructions, little room for adjustment
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Describe pursuit movements?
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High accurate due to constant update to motor command from sensory feedback, however slow
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What are the stages of voluntary movement?
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1. Intention 2. Motor program 3. Motor strategy 4. Execution
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What area of the neocortex is involved in planning a movement?
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SMA (supplementary motor area)
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The cerebellum is important to what aspect of movement?
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coordination
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What non-cortical part of the brain is involved in the initiation of a movement?
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Basal ganglia
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Problems in the basal ganglia can cause what diseases?
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Parkinsons disease (problem making movement form tremor) and Huntingtons disease (less control over movements- involuntary movements)
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What do lateral pathways have main control of?
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voluntary movements and distal muscles (fingers)
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What do ventromedial pathways have main control of?
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trunk muscles (posture)
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what are skeletal muscle fibres innervated by?
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alpha-motorneurones
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What makes up the motor unit?
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alpha motor neuron + muscle fibers
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collections of motor neurons are called what?
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motonuclei
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What is the most important mechanism for grading muscle force?
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recruitment of motor units (more motor units activated = stronger contraction of muscle)
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