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22 Cards in this Set
- Front
- Back
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Alar plate
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In the neural tube, differentiates into sensory neurons |
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Basal plate |
In the neural tube, differentiates into motor neurons |
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Rooting reflex |
Automatic turning of the head in the direction of a stimulus that touches the cheek. ex. nipple during feeding |
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Moro reflex |
Infants react to abrupt movements of their heads by flinging out their arms, then slowly retracting their arms and crying. Usually disappears after 4 months. |
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Babinski reflex
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Causes the toes to spread apart automatically when the sole of the foot is stimulated |
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Grasping reflex |
Occurs when the infant closes his or her fingers around an object placed in his hand |
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Gross motor skills |
Incorporate movement from large muscle groups and whole body motion. ex. sitting, crawling, walking |
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Fine motor skills |
Smaller muscles of the fingers, toes, and eyes. ex. tracking motion, drawing, catching, waving |
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Nociceptors |
Respond to painful or noxious stimuli (somatosensation) |
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Absolute threshold
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Minimum intensity of a stimulus that will be transduced (converted into action potentials) |
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Subliminal perception
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The perception of a stimulus below a given threshold. Stimulus arrives at CNS but does not reach higher-order brain regions that control attention and consciousness. |
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Difference threshold
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(Just-noticeable difference) The minimum difference in magnitude between two stimuli before you can perceive the difference |
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Weber's Law |
There is a constant ratio between the change in stimulus magnitude needed to produce a JND and the magnitude of the original stimulus |
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Signal detection theory |
Focuses on the changes in our perception of the same stimuli depending on both internal (psychological) and external (environmental) context. |
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Parallel processing
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Ability to simultaneously analyze and combine information regarding color, shape, and motion |
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Gestalt principles |
Ways for the brain to infer missing parts of a picture when a picture is incomplete |
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Law of proximity
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Elements close together tend to be perceived as a unit |
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Law of similarity |
Objects that are similar tend to be grouped together |
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Law of good continuation |
Elements that appear to follow in the same pathway tend to be grouped together. Tendency to perceive continuous patterns rather than abrupt changes |
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Subjective contours |
Perceiving countours and shapes that are not actually present in the stimulus |
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Law of closure |
When a space is enclosed by a contour it tends to be perceived as a complete figure |
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Law of pragnanz |
Perceptual organization will always be as regular, simple, and symmetric as possible |
