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| This glossary contains: 19186 medical terms |
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First-Order statistics
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First-Order statistics Captures differences in overall brightness.
SIMILAR TERMS--------------------------------------
First Affiliated Hospital of Nanjing Medical University
The First Affiliated Hospital of Nanjing Medical University is a hospital in Nanjing, China.
First cranial nerve
The olfactory nerve, the nerve that permits the sense of smell.
First degree burn
A superficial burn with similar characteristics to a typical sun burn. The skin is red in color and sensation is intact. In fact, it is usually somewhat painful.
First Phase Insulin Release
Release of insulin into the bloodstream from the beta cell within a few minutes after the blood glucose level rises. It is thought that this almost immediate release is due to release of insulin that was previously manufactured, and was being stored in the beta cell.
First responder
The first level of EMS certification. They are normally the first to arrive on scene, and activate the appropriate level of EMS response.
First stage of labor
The part of labor when the cervix dilates fully (to 10 centimeters). The first stage of labor is also called the stage of dilatation.
First-Order motion mechanisms
Captures motion information from moving objects or features that differ from the background in luminance.
PREVIOUS AND NEXT TERMS--------------------------------------
Fundal height
The distance between the top of a pregnant woman's uterus (called thefundus) to her pubic bone. Measured to determine fetal age.
Feature binding
The binding of features processed by different systems (audio, visual) or of different subsystems (motion, depth, color) to create a unified conscious percept.
Feature matching
In Binocular Vision and Stereopsis, disparity can be extracted from an image if features in the two corresponding binocular images are matchable e.g. lines to lines, dots to dots.
Fechner's Paradox
The fact that a monocular view may look brighter than a binocular view. Suppose that a scene is viewed through both eyes but that one eye sees it through a neutral filter that attenuates all wavelengths by a constant ratio. The filter does not distort the reflectances or ratios of light reaching the eye, but only its absolute intensity. If the filtered eye is entirely occluded the scene looks brighter and more vivid than with the filter despite the fact that less total light is reaching the two eyes and the reflectances are still the same.
Filling-In theory
Idea that the brightness and color of interiors of homogeneous regions are determined by a process of lateral spread of neural activation that is initiated by units responding to abrupt changes in luminance and wavelength.
First-Order statistics
First-Order motion mechanisms
Captures motion information from moving objects or features that differ from the background in luminance.
Fixation
Alignment of the eyes so that the image of the fixated target falls on the area centralis. For animals with immobile eyes the alignment of the head towards the fixated target.
Flicker
Alternating levels of brightness.
Flicker photometry experiment
Stimuli consisting of a pair of different color test lights alternate. When the lights alternate slowly the pattern appears to change between the colors of the two lights. When the lights alternate rapidly observers fail to see the color modulation and instead perceive a dark-light modulation. Demonstrates that the temporal resolution for distinguishing blue-yellow is less than red-green which in turn is less than light-dark.
Floater
A blurry spot that appears to float around in the eye but does not block vision. The blur is the result of debris from the vitreous humour casting a shadow on the retina.
SIMILAR TERMS--------------------------------------
First Affiliated Hospital of Nanjing Medical University
The First Affiliated Hospital of Nanjing Medical University is a hospital in Nanjing, China.
First cranial nerve
The olfactory nerve, the nerve that permits the sense of smell.
First degree burn
A superficial burn with similar characteristics to a typical sun burn. The skin is red in color and sensation is intact. In fact, it is usually somewhat painful.
First Phase Insulin Release
Release of insulin into the bloodstream from the beta cell within a few minutes after the blood glucose level rises. It is thought that this almost immediate release is due to release of insulin that was previously manufactured, and was being stored in the beta cell.
First responder
The first level of EMS certification. They are normally the first to arrive on scene, and activate the appropriate level of EMS response.
First stage of labor
The part of labor when the cervix dilates fully (to 10 centimeters). The first stage of labor is also called the stage of dilatation.
First-Order motion mechanisms
Captures motion information from moving objects or features that differ from the background in luminance.
PREVIOUS AND NEXT TERMS--------------------------------------
Fundal height
The distance between the top of a pregnant woman's uterus (called thefundus) to her pubic bone. Measured to determine fetal age.
Feature binding
The binding of features processed by different systems (audio, visual) or of different subsystems (motion, depth, color) to create a unified conscious percept.
Feature matching
In Binocular Vision and Stereopsis, disparity can be extracted from an image if features in the two corresponding binocular images are matchable e.g. lines to lines, dots to dots.
Fechner's Paradox
The fact that a monocular view may look brighter than a binocular view. Suppose that a scene is viewed through both eyes but that one eye sees it through a neutral filter that attenuates all wavelengths by a constant ratio. The filter does not distort the reflectances or ratios of light reaching the eye, but only its absolute intensity. If the filtered eye is entirely occluded the scene looks brighter and more vivid than with the filter despite the fact that less total light is reaching the two eyes and the reflectances are still the same.
Filling-In theory
Idea that the brightness and color of interiors of homogeneous regions are determined by a process of lateral spread of neural activation that is initiated by units responding to abrupt changes in luminance and wavelength.
First-Order statistics
First-Order motion mechanisms
Captures motion information from moving objects or features that differ from the background in luminance.
Fixation
Alignment of the eyes so that the image of the fixated target falls on the area centralis. For animals with immobile eyes the alignment of the head towards the fixated target.
Flicker
Alternating levels of brightness.
Flicker photometry experiment
Stimuli consisting of a pair of different color test lights alternate. When the lights alternate slowly the pattern appears to change between the colors of the two lights. When the lights alternate rapidly observers fail to see the color modulation and instead perceive a dark-light modulation. Demonstrates that the temporal resolution for distinguishing blue-yellow is less than red-green which in turn is less than light-dark.
Floater
A blurry spot that appears to float around in the eye but does not block vision. The blur is the result of debris from the vitreous humour casting a shadow on the retina.
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This dictionary contains 19186 terms.
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