Slide ()
... Afferent pathways from the two eyes project to discrete columns of neurons in the visual cortex. Retinal ganglion neurons from each eye send axons to separate layers of the lateral geniculate nucleus. The axons of neurons in the lateral geniculate nucleus project to neurons in layer IVC of the prima ...
... Afferent pathways from the two eyes project to discrete columns of neurons in the visual cortex. Retinal ganglion neurons from each eye send axons to separate layers of the lateral geniculate nucleus. The axons of neurons in the lateral geniculate nucleus project to neurons in layer IVC of the prima ...
Roger Sperry`s Classic Experiment (1940`s)
... Frog behavior: Dangle a lure frog will grab it with its tongue. ...
... Frog behavior: Dangle a lure frog will grab it with its tongue. ...
MCB 163: Mammalian Neuroanatomy
... columns) and head (via trigeminal) inputs. 19. SUPERIOR COLLICULUS The optic tectum in nonmammalian vertebrates, this structure consists of three layers: the dorsal third receives retinal input from Y- and W-ganglion cells, the intermediate part is polysensory, and the deep one-third is the source o ...
... columns) and head (via trigeminal) inputs. 19. SUPERIOR COLLICULUS The optic tectum in nonmammalian vertebrates, this structure consists of three layers: the dorsal third receives retinal input from Y- and W-ganglion cells, the intermediate part is polysensory, and the deep one-third is the source o ...
Visual pathways cortical and sub
... electrophysiological recordings from dorsal stream neurons neurons that fire during reaching neurons firing during saccades towards stationary objects neurons responding to moving objects if followed by gaze ...
... electrophysiological recordings from dorsal stream neurons neurons that fire during reaching neurons firing during saccades towards stationary objects neurons responding to moving objects if followed by gaze ...
CS 160 * Comparative Cognition * Spring 02
... - e.g. “Blindsight” Human w/damage to higher visual areas is “blind” but can point to moving stim. - Inferior Colliculus = Processes auditory info (esp location), & integrate with motor output - Together, Colliculi coord their “maps” of motion in vis & auditory world, so thing seen = thing heard - N ...
... - e.g. “Blindsight” Human w/damage to higher visual areas is “blind” but can point to moving stim. - Inferior Colliculus = Processes auditory info (esp location), & integrate with motor output - Together, Colliculi coord their “maps” of motion in vis & auditory world, so thing seen = thing heard - N ...
Eye Structure - WordPress.com
... Prevents Containing sebaceous glands to prevent tear overflow and lids sticking together ...
... Prevents Containing sebaceous glands to prevent tear overflow and lids sticking together ...
Slide ()
... Responses of neurons in the primary visual cortex of a monkey to visual stimuli. (Adapted, with permission, from Hubel and Wiesel 1977.) A. A diagonal bar of light is moved leftward across the visual field, traversing the receptive fields of a binocularly responsive cell in area 17 of visual cortex. ...
... Responses of neurons in the primary visual cortex of a monkey to visual stimuli. (Adapted, with permission, from Hubel and Wiesel 1977.) A. A diagonal bar of light is moved leftward across the visual field, traversing the receptive fields of a binocularly responsive cell in area 17 of visual cortex. ...
Anatomy and Physiology
... Temporal Occipital In general they have function but remember this is in general ...
... Temporal Occipital In general they have function but remember this is in general ...
Brain Organization or, why everyone should have some
... Temporal Occipital In general they have function but remember this is in general ...
... Temporal Occipital In general they have function but remember this is in general ...
Slide ()
... Pathways for visual processing, pupillary reflex and accommodation, and control of eye position. A. Visual processing. The eye sends information first to thalamic nuclei, including the lateral geniculate nucleus and pulvinar, and from there to cortical areas. Cortical projections go forward from the ...
... Pathways for visual processing, pupillary reflex and accommodation, and control of eye position. A. Visual processing. The eye sends information first to thalamic nuclei, including the lateral geniculate nucleus and pulvinar, and from there to cortical areas. Cortical projections go forward from the ...
Superior colliculus
The superior colliculus, (Latin, upper hill) is a paired structure of the mammalian midbrain. In other vertebrates this is known as the optic tectum or simply tectum, and the adjective tectal may also be used. The superior colliculus forms a major component of the midbrain. The tectum is a layered structure, with a number of layers that varies by species. The superficial layers are sensory-related, and receive input from the eyes as well as other sensory systems. The deep layers are motor-related, capable of activating eye movements as well as other responses. There are also intermediate layers, with multi-sensory cells and motor properties.The general function of the tectal system is to direct behavioral responses toward specific points in egocentric (""body-centered"") space. Each layer of the tectum contains a topographic map of the surrounding world in retinotopic coordinates, and activation of neurons at a particular point in the map evokes a response directed toward the corresponding point in space. In primates, the superior colliculus has been studied mainly with respect to its role in directing eye movements. Visual input from the retina, or ""command"" input from the cerebral cortex, create a ""bump"" of activity in the tectal map, which, if strong enough, induces a saccadic eye movement. Even in primates, however, the tectum is also involved in generating spatially directed head turns, arm-reaching movements, and shifts in attention that do not involve any overt movements. In other species, the tectum is involved in a wide range of responses, including whole-body turns in walking rats, swimming fishes, or flying birds; tongue-strikes toward prey in frogs; fang-strikes in snakes; etc.In some vertebrates, including fish and birds, the tectum is one of the largest components of the brain. In mammals, and especially primates, the massive expansion of the cerebral cortex reduces the tectum (""superior colliculus"") to a much smaller fraction of the whole brain. It remains nonetheless important in terms of function as the primary integrating center for eye movements.Note on terminology: This article follows terminology established in the literature for the analogous structure in mammals/non-mammals (see above), using the term ""superior colliculus"" when discussing mammals and ""optic tectum"" when discussing either specific non-mammalian species or vertebrates in general.