Finding a face in the crowd: parallel and serial neural mechanisms
... compared on trials during which the cue was of the preferred or nonpreferred color for the neuron (Fig. 2A). When a stimulus of the preferred color was in the RF, neurons gave enhanced responses when it matched the cue color. Responses to a RF stimulus of the nonpreferred color, on the other hand, w ...
... compared on trials during which the cue was of the preferred or nonpreferred color for the neuron (Fig. 2A). When a stimulus of the preferred color was in the RF, neurons gave enhanced responses when it matched the cue color. Responses to a RF stimulus of the nonpreferred color, on the other hand, w ...
Perception - U
... • Individuals with damage to primary visual cortex have scotomas or areas of blindness in corresponding areas of the visual field • Amazingly, when forced to guess, some brain-damaged patients can respond to stimuli in their scotomas (e.g., can grab a moving object or guess the direction of its move ...
... • Individuals with damage to primary visual cortex have scotomas or areas of blindness in corresponding areas of the visual field • Amazingly, when forced to guess, some brain-damaged patients can respond to stimuli in their scotomas (e.g., can grab a moving object or guess the direction of its move ...
PSYC550 Sense or Senseless
... – Deficits in visual perception in the absence of blindness; caused by brain damage. • apperceptive visual agnosia – Failure to perceive objects, even though visual acuity is relatively normal. • associative visual agnosia – Inability to identify objects that are perceived visually, even though the ...
... – Deficits in visual perception in the absence of blindness; caused by brain damage. • apperceptive visual agnosia – Failure to perceive objects, even though visual acuity is relatively normal. • associative visual agnosia – Inability to identify objects that are perceived visually, even though the ...
Towards natural stimulation in fMRI—Issues of data analysis
... with a hemodynamic response function (HRF), is used as a predictor to determine the activated brain areas. In addition to these hypothesis-driven methods, the analysis of fMRI signals recorded during presentation of natural stimulation could benefit from data-driven approaches, such as independent c ...
... with a hemodynamic response function (HRF), is used as a predictor to determine the activated brain areas. In addition to these hypothesis-driven methods, the analysis of fMRI signals recorded during presentation of natural stimulation could benefit from data-driven approaches, such as independent c ...
article
... Nevertheless, there are individual differences in the location of cognitive functions in the cerebral cortex. For example, about 30% of left-handers have right-hemisphere dominance for language or bilateral (in both hemispheres) dominance. And, in a case noted by Gazzaniga (1998), the speech of a le ...
... Nevertheless, there are individual differences in the location of cognitive functions in the cerebral cortex. For example, about 30% of left-handers have right-hemisphere dominance for language or bilateral (in both hemispheres) dominance. And, in a case noted by Gazzaniga (1998), the speech of a le ...
III
... and tract, from the retina to the pretectal region of the midbrain. The efferent pathway is in the oculomotor nerve: parasympathetic fibers from the accessory oculomotor nucleus (E-W nucleus), synapsing in the ciliary ganglion, and supplying the sphincter pupillae. Because of contralateral connectio ...
... and tract, from the retina to the pretectal region of the midbrain. The efferent pathway is in the oculomotor nerve: parasympathetic fibers from the accessory oculomotor nucleus (E-W nucleus), synapsing in the ciliary ganglion, and supplying the sphincter pupillae. Because of contralateral connectio ...
PowerPoint Presentation on Ecosystems
... • Evolution necessarily ignores events that don’t actually happen, even if they are catastrophic. (So do we.) • Thus tails may be extra heavy. • Specialization consistently correlates with extinction risk in large extinctions. • For example, body size increases over time on average (both within and ...
... • Evolution necessarily ignores events that don’t actually happen, even if they are catastrophic. (So do we.) • Thus tails may be extra heavy. • Specialization consistently correlates with extinction risk in large extinctions. • For example, body size increases over time on average (both within and ...
Chapter 16: Consciousness
... It is unlikely that recurrent processing is always associated with conscious awareness. Recurrent processing can occur without conscious awareness (Scholte et al., 2006). Most research on conscious experience has focused on visual consciousness. Visual consciousness has typically been assessed u ...
... It is unlikely that recurrent processing is always associated with conscious awareness. Recurrent processing can occur without conscious awareness (Scholte et al., 2006). Most research on conscious experience has focused on visual consciousness. Visual consciousness has typically been assessed u ...
TalkHumaine_grandjean
... modulate attentional processes and could thus orient the ressources of organism (or ECAs …) on specific events or objects. ...
... modulate attentional processes and could thus orient the ressources of organism (or ECAs …) on specific events or objects. ...
The Integrative Role of Posterior Parietal Cortex and related Clinical S
... by neurons of the LIP area- lateral intraparietal area). 3. Touch In case of touch, the sensorial information is integrated in the right parietal cortex in order to allow the person to recognize an object by its “form”. The capacity is called stereognosia. It is possible to test this ability on the ...
... by neurons of the LIP area- lateral intraparietal area). 3. Touch In case of touch, the sensorial information is integrated in the right parietal cortex in order to allow the person to recognize an object by its “form”. The capacity is called stereognosia. It is possible to test this ability on the ...
face-specific responses from the human inferior occipito
... pointillized faces (lower part of the inset) suggested very weak activity over the occipital cortex. Responses to the two stimulus categories also differed at the posterior channels (Fig. 2). It is suggested that this difference reflects the differential processing of simple visual features. Respons ...
... pointillized faces (lower part of the inset) suggested very weak activity over the occipital cortex. Responses to the two stimulus categories also differed at the posterior channels (Fig. 2). It is suggested that this difference reflects the differential processing of simple visual features. Respons ...
Document
... controversial operations ever performed Yet it can succeed, when all else fails, in relieving violent, drug-resistant epileptic seizures This surgery is becoming more and more rare – Instead, neurosurgeons are using a variety of neuroscience techniques to reduce the amount of tissue removed in brain ...
... controversial operations ever performed Yet it can succeed, when all else fails, in relieving violent, drug-resistant epileptic seizures This surgery is becoming more and more rare – Instead, neurosurgeons are using a variety of neuroscience techniques to reduce the amount of tissue removed in brain ...
The misunderstood misophonia - American Academy of Audiology
... pre-attention, N1 with early attention, and P2 with early allocation of attention and initial conscious awareness (Hall, 1992). The ALR was evoked with regularly presented 1000 Hz stimuli plus oddball stimuli at 250 and 4000 Hz while subjects watched a silent movie. There was no difference in the AL ...
... pre-attention, N1 with early attention, and P2 with early allocation of attention and initial conscious awareness (Hall, 1992). The ALR was evoked with regularly presented 1000 Hz stimuli plus oddball stimuli at 250 and 4000 Hz while subjects watched a silent movie. There was no difference in the AL ...
- Neuro-Optometric Rehabilitation Association
... and emotional systems. Dysfunctional processing or linkages can cause a distortion in spatial or temporal orientation and an overall diminution in the patient’s ability to perform even simple everyday tasks. More than 30% of the human cortex is devoted to vision and visual processing connections wit ...
... and emotional systems. Dysfunctional processing or linkages can cause a distortion in spatial or temporal orientation and an overall diminution in the patient’s ability to perform even simple everyday tasks. More than 30% of the human cortex is devoted to vision and visual processing connections wit ...
Posterior Parietal Cortex: Space…and Beyond
... rule that monkey was instructed (by the task cue) to use on the upcoming trial. The majority of rule-selective neurons in this study were found in the lateral bank of the intraparietal sulcus, within the PPC. Interestingly, rule selectivity was strongest during the delay period, approximately 400–60 ...
... rule that monkey was instructed (by the task cue) to use on the upcoming trial. The majority of rule-selective neurons in this study were found in the lateral bank of the intraparietal sulcus, within the PPC. Interestingly, rule selectivity was strongest during the delay period, approximately 400–60 ...
Visual7
... area for motion vision). Parvocellular – input from P cells (ganglionic cells with small dendritic arbours) – for discriminative aspects of visual form and colour. These systems project to distinct parts of the 1° visual cortex. ...
... area for motion vision). Parvocellular – input from P cells (ganglionic cells with small dendritic arbours) – for discriminative aspects of visual form and colour. These systems project to distinct parts of the 1° visual cortex. ...
Document
... Analysis of Visual Information: Role of the Association Cortex Two Streams of Visual Analysis • The outputs of the striate cortex (area V1) are sent to area V2, a region of the extrastriate cortex just adjacent to V1. As we saw in Figure 6.28, a dye for cytochrome oxidase reveals blobs in V1 and th ...
... Analysis of Visual Information: Role of the Association Cortex Two Streams of Visual Analysis • The outputs of the striate cortex (area V1) are sent to area V2, a region of the extrastriate cortex just adjacent to V1. As we saw in Figure 6.28, a dye for cytochrome oxidase reveals blobs in V1 and th ...
Science - Princeton University
... visual receptive fielcls which were very large (greclter than 10 by 10 degrees) and alnzost alwciys iizcluded the fovea. Some extended well into both halves o f the visual fielcl, while others were coizfiized to the ipsilateral or coiztralateral side. These nezrrolis were diflerentially seizsitive t ...
... visual receptive fielcls which were very large (greclter than 10 by 10 degrees) and alnzost alwciys iizcluded the fovea. Some extended well into both halves o f the visual fielcl, while others were coizfiized to the ipsilateral or coiztralateral side. These nezrrolis were diflerentially seizsitive t ...
Neural Basis of Emotion - Caltech Division of Humanities and Social
... stimuli only if they were associated with reward, and these neurons showed one trial stimulus-reinforcement association reversal. Another class of neuron conveyed information about whether a reward had been given, responding, for example, to the taste of sucrose, or for other neurons of saline. Thes ...
... stimuli only if they were associated with reward, and these neurons showed one trial stimulus-reinforcement association reversal. Another class of neuron conveyed information about whether a reward had been given, responding, for example, to the taste of sucrose, or for other neurons of saline. Thes ...
Brain Areas and Topography
... • Neuroimager’s definition of an area: Some blob vaguely in the vicinity (+/- ~3 cm) of where I think it ought to be that lights up for something I think it ought to light up for • Neuroanatomist’s definition of an area: A circumscribed region of the cerebral cortex in which neurons together serve a ...
... • Neuroimager’s definition of an area: Some blob vaguely in the vicinity (+/- ~3 cm) of where I think it ought to be that lights up for something I think it ought to light up for • Neuroanatomist’s definition of an area: A circumscribed region of the cerebral cortex in which neurons together serve a ...
On-center off surround ganglion cells
... hierarchical fashion with increasingly higher visual areas being more closely related to our internal conscious experience. But if this is the case how to explain awareness of all details in the observed image? The interactive theory of visual consciousness emphasizes interactions between lower an ...
... hierarchical fashion with increasingly higher visual areas being more closely related to our internal conscious experience. But if this is the case how to explain awareness of all details in the observed image? The interactive theory of visual consciousness emphasizes interactions between lower an ...
Sparse coding in the primate cortex
... record a set of neurons simultaneously across which sparseness could be measured. Techniques, such as optical recording and multiple electrode recording, may eventually yield data on the density of coding, but there are presently formidable technical difficulties to overcome. We have more informatio ...
... record a set of neurons simultaneously across which sparseness could be measured. Techniques, such as optical recording and multiple electrode recording, may eventually yield data on the density of coding, but there are presently formidable technical difficulties to overcome. We have more informatio ...
Why light
... Note that layer 3 receives input from the left eye and layer 4 receives input from the right eye. Registration refers to the fact that the projections of activity in layers 3 and 4 are at the same place in their respective layers, even though the stimulation is from different eyes. That is, the acti ...
... Note that layer 3 receives input from the left eye and layer 4 receives input from the right eye. Registration refers to the fact that the projections of activity in layers 3 and 4 are at the same place in their respective layers, even though the stimulation is from different eyes. That is, the acti ...
lgn - cinpla
... The lateral geniculate nucleus (LGN) is placed in a prominent position in the early visual pathway. It sits between the retina and the visual cortex, acting as a relay between the two. Inserting a microelectrode into the LGN reveals that the receptive fields are very similar to those in the retina. ...
... The lateral geniculate nucleus (LGN) is placed in a prominent position in the early visual pathway. It sits between the retina and the visual cortex, acting as a relay between the two. Inserting a microelectrode into the LGN reveals that the receptive fields are very similar to those in the retina. ...
Visual extinction
Visual extinction is a neurological disorder which occurs following damage to the parietal lobe of the brain. It is similar to, but distinct from, hemispatial neglect. Visual extinction has the characteristic symptom of difficulty to perceive contralesional stimuli when presented simultaneously with an ipsilesional stimulus, but the ability to correctly identify them when not presented simultaneously. Under simultaneous presentation, the contralesional stimulus is apparently ignored by the patient, or extinguished. This deficiency may lead to difficulty on behalf of the patient with processing the stimuli’s 3D position.