Term
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Definition
| Mean signed difference between movement enacted and goal. |
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Term
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Definition
Standard deviation of the constant error. |
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Term
| Inaccurate and Inconsistent |
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Definition
| Low variable error with high constant error |
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Term
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Definition
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Term
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Definition
| High constant error with low variable error. |
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Term
| What technique is used that examines the amount of blood flow and has good spatial resolution? |
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Definition
| fMRI - measures the amount of deoxygenated blood to oxygenated blood |
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Term
| What technique measures electrical signals and has good temporal resolution but poor spatial? |
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Definition
| EEG or Electroencephalography: Limited to the superficial structures such as the cortex, cannot reach the thalamus, basal ganglia and medulla as well. |
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Term
| What are the three types of interference studies? |
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Definition
| Transcranial Magnetic Stimulation (TMS), Using patients with prior lesions, and the Infliction of lesions upon animal subjects. |
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Term
| What are some of the complications with Patient populations used for interference studies? |
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Definition
-It is difficult to know the full extent of the damage. (Small regions of damage can result in extreme deficits, and vice versa) -The brain is cortically plastic and can compensate for itself. |
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Term
| What are some of the advantages of animal trials over human trials in regards to deficit studies. |
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Definition
-Lesions can be controlled either permanently or temporarily as in the case of anesthesia. -Single neurons can be controlled with electrodes, which cannot happen in human studies. -Areas of the brain can also be stimulated with electrodes. |
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Term
| What are some of the disadvantages to animal studies? |
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Definition
-Time consuming. -Requires inference between correlation of animal and human brains -Sacrafice of animal |
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Term
| What occurs with TMS? What are the advantages? |
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Definition
TMS requires breif pulses of magnetic stimulation which excites tissue producing a response. -Can be used to map out the homunculus of the motor cortex, but is limited to superficial structures. |
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