What is the ventral pathway?

Ventral stream: 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.

The ventral visual pathway is a functional stream involved in the visual recognition of objects. While areas V1, V2, and V4 are involved in the processing of basic level visual features such as edges, contours, and color, the inferior temporal cortex is suggested to process complex shapes (Ungerleider & Haxby, 1994).

Additionally, what is the pathway and where pathway? The dorsal stream (or, “where pathway“) leads to the parietal lobe, which is involved with processing the object’s spatial location relative to the viewer and with speech repetition.

Consequently, what does the ventral pathway do?

Ventral stream: 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 is the ventral stream?

The ventral stream originates in primary visual cortex and extends along the ventral surface into the temporal cortex; the dorsal stream also arises in primary visual cortex, but continues along the dorsal surface into parietal cortex.

What are the two visual systems?

This two-visual-systems hypothesis (TVSH) proposes that the ventral stream of visual pathways in the cerebral cortex, which delivers up our visual experience of the world, works in an allocentric frame of reference, whereas the dorsal stream, which mediates the visual control of action, uses egocentric frames of

What is happening in the dorsal visual pathway?

Definition. 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 is form agnosia?

Neurology Department, University Hospital, Zurich, Switzerland. Abstract. Visual form agnosia is a severe disorder of visual recognition resulting from extrastriate lesions in occipital and temporal cortex.

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. See also: ventral stream.

What part of the brain processes visual stimuli?

Visual cortex. The visual cortex of the brain is that part of the cerebral cortex which processes visual information. It is located in the occipital lobe.

What does the parietal lobe do?

The brain is divided into lobes. The parietal lobe is at the back of the brain and is divided into two hemispheres. It functions in processing sensory information regarding the location of parts of the body as well as interpreting visual information and processing language and mathematics.

What are pathways in the brain?

A neural pathway connects one part of the nervous system to another using bundles of axons called tracts. The optic tract that extends from the optic nerve is an example of a neural pathway because it connects the eye to the brain; additional pathways within the brain connect to the visual cortex.

Which pathway processes information about orientation?

The second pathway, the ventral stream, processes information relating to shape, size, objects, orientation, and text. This is commonly known as the ‘what’ system. Visual stimuli in this system process ventrally from the primary visual cortex to the medial temporal lobe.

What is the magnocellular pathway?

The magnocellular pathway carries information from the large retinal ganglion cells to the large cells in the LGN (magno=large in Latin) and from there to the primary visual cortex, V1 within the retinocalcarine pathway and over the SC to numerous subcortical functions and to the parietal visual functions.

What causes Akinetopsia?

The akinetopsia often occurs with visual trailing (palinopsia), with afterimages being left at each frame of the motion. It is caused by prescription drugs, hallucinogen persisting perception disorder (HPPD), and persistent aura without infarction.

How is blindsight possible?

Blindsight is a phenomenon in which patients with damage in the primary visual cortex of the brain can tell where an object is although they claim they cannot see it. Scientists now provide compelling evidence that blindsight occurs because visual information is conveyed bypassing the primary visual cortex.

What is the Parvocellular pathway?

In both human and Old World primates visual information is conveyed by two parallel pathways: the magnocellular (M) and parvocellular (P) streams that project to separate layers of the lateral geniculate nucleus and are involved primarily in motion and color/form discrimination.

Which lobe of the cerebrum controls motor functions?

frontal lobe

Where is color processed in the brain?

The colour centre in humans is thought to be located in the ventral occipital lobe as part of the visual system, in addition to other areas responsible for recognizing and processing specific visual stimuli, such as faces, words, and objects.