Prosipagnosia Emily C Flashcards
(25 cards)
Brain disorder that makes difficult to recognize people by their face
-also known as face blindness or facial agnosia
Prosopagnosia
Normally an individual can recognize and remember ____faces throughout their life time
5000+
Human babies show the capacity to recognize faces as young as ____of age, and the ability is seen in nonhuman primates
-suggesting that it is a highly conserved, adaptive function
6 months
In Prosopagnosia is not related to?
Memory dysfunction, memory loss, impaired vision or learning disabilities
Prosopagnosia results from congenital influence, damage or impairment in ____.
Right fusiform gyrus
The right fusiform gyrus is located in both ___ and ____
Occipital ( responsible for visual processing) and temporal lobe (responsible for retaining visual memories
What are the two forms of Prosopagnosia?
Developmental/congenital and acquired
Where an individual has the disorder without having brain damage
Developmental/congenital
Where an individual has the disorder due to brain damage (often following a stroke or TBI)
Acquired
-trouble recognizing faces that are familiar to them
-rely greatly on non facial information (hair, gait, height, clothing and voice)
-have trouble following plot of television shows and movies because they can not keep track of the characters
-difficulty knowing whether or not they have seen one’s face before
-disorientation in crowded areas
-difficulty imagining faces of people they know
-inability to describe faces
Symptoms of Prosopagnosia
Occipital cortex of the brain is responsible for the _____
Perception of visual information
-signals generated by the eyes are carried by nerve tracts to the occipital cortex
-then this information is relayed to the ___area of the ____ lobe
-fusiform area computes this information and tells you whom this face belongs to
-patients with Prosopagnosia: eyes, nerve tracts and occipital cortex are intact but they have a defective ____
- Fusiform face area of the temporal lobe
- Fusiform area
Functions of the fusiform area can be disturbed by?
Tumors, stroke, MS and congenital
Visual information first received in the ___ visual cortex —> information then travels to the ____ visual association cortex —> facial recognition is processed in the _____ at the fusiform gyrus, where communication occurs with the temporal lobe to associate with memory and apply meaning to the face
- V1-2
- V3-5
- Inferior occipital lobe
In Prosopagnosia lesions are in the ____
-unilateral cases are less common but when they occur, they are most often attributable to right sided lesions
Bilateral inferior occipitotemporal lobes
_____ and ____ stream are both necessary to further interpret what is seen and where it is seen
Dorsal (where) and ventral (what)
What stream is output from ____ to ___ and ____
-primary function is?
- V1 to V2, V4 and inferotemporal cortex
- Object perception and recognition
Where stream is output from ____ to ___ and ____
-primary function?
- V1 to V2, V3 and posterior parietal cortex
- Spatial perception
Fusiform area mistake the shadows and other details for facial features
Pareidolia
____ test is used to separate Prosopagnosia from cortical blindness or autopagnosia
Object memory test
This happens when there’s damage to the parts of your brain that recurve visual input. Your eyes work but your brain can’t process the signals sent from your eyes
Cortical blindness
People with this type have trouble recognizing body parts, either their own or on another person. They might also have trouble recognizing body parts from drawing or picture
Autopagnosia
____ test individuals are asked to identify a face out of six test faces which best suits a target face
-images do not include hair, clothes or any possible cues which may help with identification outside of facial recognition
-reliability of the test is criticized
Benton facial recognition test
___they would respond to any picture of your own grandmother and aid in the recollection of memories associated with your grandmother
-single neurons respond to complex stimuli such as faces, hands, expressions, objects and so on
Grandmother cell or gnostic neurons
