a pathway that
carries visual information from the primary visual cortex to the temporal lobe
. According to one widely-accepted hypothesis, the ventral stream (so named because of the path it takes along the ventral side of the brain) carries information related to object form and recognition.
Where does the ventral pathway project to?
The ventral stream (also known as the “what pathway”) leads to
the temporal lobe
, which is involved with object and visual identification and recognition.
What does the dorsal pathway do?
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. See also: ventral stream.
What does the ventral stream control?
They argued that the ventral stream is involved in
the perception of information about objects (vision for perception)
and the dorsal stream processes information to guide actions (vision for action).
What is human dorsal and ventral pathways?
The ventral stream (or “vision-for-perception” pathway) is believed to
mainly subserve recognition and discrimination of visual shapes and objects
, whereas the dorsal stream (or “vision-for-action” pathway) has been primarily associated with visually guided reaching and grasping based on the moment-to-moment analysis …
What is happening in the dorsal visual pathway?
The dorsal visual pathway is a functional stream originating in primary visual cortex and terminating in the superior parietal lobule that is responsible for
the localization of objects in space and for action-oriented behaviors that depend on the perception of space
.
What happens if the ventral stream is damaged?
Patients with damage to the ventral stream are
typically unable to perceive the size, shape, and orientation of objects
. Remarkably, however, some of these patients continue to show normal preshaping and rotation of the hand when they reach out to grasp the very objects whose forms they fail to see.
What brain areas are part of the ventral pathway?
The ventral pathway was described as coursing through the occipitotemporal cortex to
the anterior part of the inferior temporal gyrus (area TE)[1
, 2], with a likely extension into the ventrolateral prefrontal cortex (VLPFC/area FDv)[3].
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.
Where does the ventral stream end and what type of information does it process?
Dorsal Stream which is tuned to where the object is and is the object moving. Whereas the Ventral Stream is
tuned to what is the object, what is the color of the object
, and what form it has. <br>The Dorsal Stream ends in the posterior parietal complex whereas the Ventral Stream ends at the inferior parietal complex.
What is ventral system?
a series of cortical maps of the visual field that flow from the occipital cortex to the temporal lobe
. These maps represent nameable visual features of objects, such as color, size, texture, object identity, and the like. The ventral stream is known informally as the “what” pathway of perception.
What are the function of ventral and dorsal stream?
The ventral stream is likely not contributing toward object vision alone but is involved in the processing of a number of visual features; the ventral stream is not solely responsible for object recognition;
the dorsal stream is responsible for spatial vision as well as for spatial attention
, and is responsible for …
What is dorsal and ventral side?
The main difference between dorsal and ventral is the area of the body to which they refer. In general,
ventral refers to the front of the body, and dorsal refers to the back
. … Similarly, for the feet, the dorsal side is the top of the foot, or the area facing upwards when standing upright.
What does dorsal mean in psychology?
adj.
denoting the hind region or the back surface of the body
. In reference to the latter, this term sometimes is used interchangeably with posterior. Compare ventral.
What is form agnosia?
Visual form agnosia is
a severe disorder of visual recognition resulting from extrastriate lesions in occipital and temporal cortex
. Despite preserved visual acuity and minor visual field defects, patients with visual form agnosia are severely impaired in shape and form discrimination.
What is Inferotemporal cortex?
Inferior Temporal (IT) Cortex is
the cerebral cortex on the inferior convexity of the temporal lobe
in primates including humans. It is crucial for visual object recognition and is considered to be the final stage in the ventral cortical visual system.
