|
| | |
Parvocellular pathway
Parvocellular pathway Pathway that begins with the midget (parvo) ganglion cells in the retina and terminates within the parvocellular layer of the LGN. Conduction slower than that of Magnocellular Pathway.
RELATED TERMS--------------------------------------
Ganglion
A cluster of nerve cells.
Retina
A membrane lining the inside of the back of the eye that contains light-sensitive nerve cells that convert focused light into nerve impulses, making vision possible.
LGN
See Lateral Geniculate Nucleus.
SIMILAR TERMS--------------------------------------
Parvocellular layer
4 superficial layers of the Lateral Geniculate Nucleus. Small neurons, termination sight of midget ganglion cells.
Parvovirus
May cause an arthritis in adults (females mainly) and behaves like rubella. Causes erythema infectiosum (Fifth disease or 'slapped cheek syndrome') in children.
PREVIOUS AND NEXT TERMS--------------------------------------
Prolonged labor
When labor does not progress to vaginalbirth after 18 hours.
Puerperium
The period from the third stage of labor through the uterus's recovery after childbirth.
Purgative
A purging medicine; something that cleanses or purges the body (via the bowels) of an unwanted substance.
Parvocellular layer
4 superficial layers of the Lateral Geniculate Nucleus. Small neurons, termination sight of midget ganglion cells.
Palinopsia
Literally 'seeing again'; Is a form of visual perseveration. It refers to reappearance of an image after some time when the original external stimulus is no longer available. Neural basis of palinopsia is unknown but many palinopsia patients have some right-hemisphere disturbances.
Parvocellular pathway
Pattern adaptation
The perceived width and orientation of a grating pattern can be altered by first adapting to grating pattern of different frequencies and orientations. After adapting the contrast sensitivity to stimuli near the frequency or orientation of the adapting pattern is reduced. Suggests the existence of neurons tuned for frequency and orientation at are fatigued by the adapting pattern.
Perceptive field
Area of the retina or visual space that when stimulated by a visual stimulus produces a change in behavioral response.
Perceptual constancy
The phenomenon that the perception of an object remains constant despite changes in the its size, lighting conditions and orientation.
Perceptually lossless compression
An image processing technique with loses some information about contents of the image, but the distortions produced by the loss aren't visible to the human image processing system.
Peri-Stimulus time histogram
Plot of the average number of action potentials at each moment in time following a brief test flash.
We thank you for using the Health Dictionary to search for Parvocellular pathway. If you have a better definition for Parvocellular pathway than the one presented here, please let us know by making use of the suggest a term option. This definition of Parvocellular pathway may be disputed by other professionals. Our attempt is to provide easy definitions on Parvocellular pathway and any other medical topic for the public at large.This dictionary contains 25007 terms. |
|
|
