Table of Contents
What is the visual pathway?
The visual pathway consists of the retina, optic nerves, optic chiasm, optic tracts, lateral geniculate bodies, optic radiations, and visual cortex. The pathway is, effectively, part of the central nervous system because the retinae have their embryological origins in extensions of the diencephalon.
How does the visual pathway work?
The visual pathway begins with the retina. The outermost layer of the retina is composed of the photoreceptors, dendritic processes of the rod and cone neurons. Photoreceptors are distributed throughout the retina, but a greater density of receptors is located in the area centralis, which is important for acute vision.
What is the visual pathway in psychology?
The primary visual pathway consists of the retina, optic nerve, lateral geniculate nucleus (LGN) of the thalamus, and the visual cortex of occipital lobe. Each of these structures function in sequence to transform the visual signal, leading to our visual perception of the external world.
What is the difference between auditory and visual system?
Visual motion perception is based on a direct, topographically organized representation, whereas the auditory system infers motion indirectly by calculating location-dependent time and intensity differences between the two ears (Wilson & O’Neill, 1998).
What is the importance of visual pathway?
The visual pathway refers to the anatomical structures responsible for the conversion of light energy into electrical action potentials that can be interpreted by the brain. It begins at the retina and terminates at the primary visual cortex (with several intercortical tracts).
How do we see pathway?
Think of the visual pathway like a highway, with neurons as the cars and your vision as the driver. Ideally, the pathway is smooth and efficient, with predictable curves and directions leading from your optic nerve to your occipital lobe’s primary visual cortex.
What are the two visual pathways?
As visual information exits the occipital lobe, and as sound leaves the phonological network, it follows two main pathways, or “streams”. The ventral stream (also known as the “what pathway”) leads to the temporal lobe, which is involved with object and visual identification and recognition.
Where is the pathway of the brain?
According to one widely-accepted hypothesis, the dorsal stream (so named because of the path it takes along the dorsal side of the brain) carries information related to movement and spatial relationships between objects in the visual field. It is sometimes called the “where” pathway.
What part of the brain controls visual and auditory reflexes?
midbrain
tectum: The dorsal part of the midbrain, responsible for auditory and visual reflexes.
Which is faster auditory or visual reaction time?
Reaction is purposeful voluntary response to different stimuli as auditory or visual stimuli. Since the auditory stimulus reaches the cortex faster than the visual stimulus; the auditory reaction time is faster than the visual reaction time.