What does the dorsal stream Specialise in?
The dorsal stream is involved in spatial awareness and guidance of actions (e.g., reaching).
What happens if the dorsal stream is damaged?
Dorsal damage can cause: Trouble with spatial perception and perception of complex movement. Trouble with spatial orientation and navigation. Impaired spatial guidance of motor activities (saccadic and pursuit eye movements; reaching, grasping and pointing; walking over steps; navigating crowds and obstacles)
What type of processing is accomplished by the dorsal path?
The dorsal stream processes information about the “where” of the visual stimulus (Figure 15.10). Damage the dorsal visual association cortex results in deficits in spatial orientation, motion detection and in guidance of visual tracking eye movements.
Which visual features are processed by the dorsal stream?
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 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 does the dorsal do?
Dorsal: Relating to the back or posterior of a structure. Some of the dorsal surfaces of the body are the back, buttocks, calves, and the knuckle side of the hand. For a more complete listing of terms used in medicine for spatial orientation, please see the entry to “Anatomic Orientation Terms”.
What is the most common cause of damage to the dorsal stream?
Dorsal stream dysfunction results from posterior parietal damage and is associated with cerebral palsy, periventricular white matter injury, premature birth, hydrocephalus and Williams syndrome, and similar visual difficulties are becoming apparent in children with autistic spectrum disorder.
What is the dorsal visual stream?
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 does the dorsal visual pathway do?
What is dorsal example?
The definition of dorsal is something related to the back or the upper side of a plant or animal. The fin on a shark’s back is an example of something that would be described as dorsal. A dorsal part, such as a fin. noun. Relating to or on the back or upper surface of an animal.
Is dorsal posterior?
Posterior or dorsal – back (example, the shoulder blades are located on the posterior side of the body). Medial – toward the midline of the body (example, the middle toe is located at the medial side of the foot).
What are the groups in the dorsal stream?
The Dorsal Stream The dorsal stream, or where pathway, describes a hierarchy of areas that support visually-guided behaviors and localizing objects in space. It involves two main groups of areas, which receive separate, strong projections from V1. The lateral group in the dorsal stream consists of areas MT, MTc, MST, and FST.
How is the dorsal stream involved in spatial awareness?
It is involved in spatial awareness: recognizing where objects are in space. The dorsal stream is one of two main pathways of the visual cortex, the other being the ventral stream .
How is FST involved in the dorsal stream?
This suggests that FST is involved in the integration of information analyzed by the dorsal and ventral streams of processing. Due to its small size, lesions of area MT typically also affect its satellite areas to some extent.
Where does the dorsal stream of the Brain Project?
The dorsal stream projects dorso-posteriorly involving a region in the posterior Sylvian fissure at the parietal-temporal boundary (area Spt), and ultimately projecting to frontal regions. This network provides a mechanism for the development and maintenance of “parity” between auditory and motor representations of speech.