Visual Perception Flashcards
Primary cortices, what are they?
They are all unimodal and they only receive input from one modality
What do primary cortices do?
They put together more modalities
What is the Limbic system important for?
Emotions
What is important to remember about the systems?
Every system starts with a unimodal cortice and information is integrated into a multimodal cortice
What is the cerebral cortex?
The primary area where the perception of elementary characteristics of stimuli occurs
What originates in the cerebral cortex?
The chain of neurons that lead to the contraction of muscle groups
What happens in unimodal associative areas?
Information regarding different features related to the same sensory modality converges.
What happens in multimodal associative areas?
Information related to sensory modalities and mental state converge and create, complex multimodal representations guiding complex behavioral responses
How are the optic pathways organized?
They are organized according to the hierarchical system that allows the inflow of information from the eye (organ of perception) to the occipital cerebral cortex
What happens in the optic pathways?
Projection pathways branch out, connecting different stations that process different features of the visual information.
What is the definition of “retinotopic”?
When the visual information is spatially organized
What does the retina do?
It recreates the image overturned, then the nerves convey information to the thalamus.
What happens in specific lesions to the retina?
They generate spatially organized deficits in vision.
How can we get spatially organized deficits?
By cutting the fibers in different points of the pathways
How is the information segregated in the visual pathways?
Spatially - a retinotopic organization
Qualitatively - color, shape, movement
