Hafiz Noordin Term Paper - Engineering Computing Facility
... In order to understand models of the visual cortex, it is important that the reader has some background on the physiology of the visual system, since the terminology utilized in this field tends to reflect the complex nature of the visual cortex itself. It is assumed, however, that the reader has ba ...
... In order to understand models of the visual cortex, it is important that the reader has some background on the physiology of the visual system, since the terminology utilized in this field tends to reflect the complex nature of the visual cortex itself. It is assumed, however, that the reader has ba ...
HST:583 fMRI Acquisition Lab1 Susan Whitfield
... The task consists of a block design with alternating on/off blocks of 16-second periods of breath holding and normal breathing. During the off-block, the subject sees a green screen during which they are to breathe normally. During the last 2s of the off-block, the screen becomes yellow, signifying ...
... The task consists of a block design with alternating on/off blocks of 16-second periods of breath holding and normal breathing. During the off-block, the subject sees a green screen during which they are to breathe normally. During the last 2s of the off-block, the screen becomes yellow, signifying ...
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 ...
The ABCs of VEPs and ERGs Visual Testing Systems Clinical
... Three equally spaced sinusoidal-like peaks are not present in either eye Magnitude of the pERG response is low in both eyes (below 1.20 uV) Magnitude D value is less than half the value of Magnitude in both eyes ...
... Three equally spaced sinusoidal-like peaks are not present in either eye Magnitude of the pERG response is low in both eyes (below 1.20 uV) Magnitude D value is less than half the value of Magnitude in both eyes ...
The Lateral Geniculate Nucleus of the Thalamus (A model for all
... Each LGN layer receives input from one eye only, parallel pathways to cortex ...
... Each LGN layer receives input from one eye only, parallel pathways to cortex ...
Outer layer
... made as slit to obtain an optical cross section of the transparent parts of the eye (cornea and the lens). Direct and Indirect ophthalmoscope for examination of the posterior segment of the eye Intra-ocular pressure(IOP); normal range between 10-21mmHg. IOP measured by tonometry, e.g. Goldman tono ...
... made as slit to obtain an optical cross section of the transparent parts of the eye (cornea and the lens). Direct and Indirect ophthalmoscope for examination of the posterior segment of the eye Intra-ocular pressure(IOP); normal range between 10-21mmHg. IOP measured by tonometry, e.g. Goldman tono ...
Overview of the Seven Perceptual Styles
... Interactive - refers to verbalization. Visual - refers to seeing visual depictions such as pictures and graphs. Haptic - refers to the sense of touch or grasp. Kinesthetic - refers to whole body movement. Olfactory - refers to sense of smell and taste. ...
... Interactive - refers to verbalization. Visual - refers to seeing visual depictions such as pictures and graphs. Haptic - refers to the sense of touch or grasp. Kinesthetic - refers to whole body movement. Olfactory - refers to sense of smell and taste. ...
lecture9
... 6. Visuo-motor coordination is a computationally difficult problem for the brain. Need flexibility to correct errors. ...
... 6. Visuo-motor coordination is a computationally difficult problem for the brain. Need flexibility to correct errors. ...
EXAM 1 Study Guide
... 2) specific stimuli: habituation is stimulus-specific; that is, it occurs for specific stimuli. If the stimulus is changed, habituation slows down or does not occur. 3) chemical changes: is believed to be associated with a chemical change in the interneurons rather than previously thought change in ...
... 2) specific stimuli: habituation is stimulus-specific; that is, it occurs for specific stimuli. If the stimulus is changed, habituation slows down or does not occur. 3) chemical changes: is believed to be associated with a chemical change in the interneurons rather than previously thought change in ...
Computational modeling of responses in human visual
... lower vertical meridian (green in the pseudocolor map) to the upper vertical meridian (red). The angle representation reverses at the vertical meridians, and this marks the boundary with V2. The V1 map is surrounded by a dorsal and ventral section of V2, which represent the lower (green-cyan) and up ...
... lower vertical meridian (green in the pseudocolor map) to the upper vertical meridian (red). The angle representation reverses at the vertical meridians, and this marks the boundary with V2. The V1 map is surrounded by a dorsal and ventral section of V2, which represent the lower (green-cyan) and up ...
Pattern Vision and Natural Scenes
... The behavioral contrast sensitivity function reflects the combined neural contrast sensitivity of many cortical neurons, each tuned to a particular range of frequencies. Similarly (but not shown), behavioral contrast sensitivity as a function of orientation reflects the combined neural contrast sen ...
... The behavioral contrast sensitivity function reflects the combined neural contrast sensitivity of many cortical neurons, each tuned to a particular range of frequencies. Similarly (but not shown), behavioral contrast sensitivity as a function of orientation reflects the combined neural contrast sen ...
Neural Basis of Emotion - Caltech Division of Humanities and Social
... (e) Emotions elicited by different secondary reinforcing stimuli will be different from each other (even if the primary reinforcer is similar). (f ) The emotion elicited can depend on whether an active or passive behavioral response is possible. For example, if an active behavioral response can occu ...
... (e) Emotions elicited by different secondary reinforcing stimuli will be different from each other (even if the primary reinforcer is similar). (f ) The emotion elicited can depend on whether an active or passive behavioral response is possible. For example, if an active behavioral response can occu ...
(2006) Changes in visual receptive fields with microstimulation of
... responses uniformly across the RF, then its effects should be the same when single stimuli are presented at either location. However, if instead microstimulation drives the selection of stimuli located at the saccade endpoint, then it should only enhance responses in the aligned condition. Furthermo ...
... responses uniformly across the RF, then its effects should be the same when single stimuli are presented at either location. However, if instead microstimulation drives the selection of stimuli located at the saccade endpoint, then it should only enhance responses in the aligned condition. Furthermo ...
Towards natural stimulation in fMRI—Issues of data analysis
... boxcar functions (convolved with HRF), one for each stimulus type. The fMRI time series were high-pass filtered with cut-off at 1/342 s, and serial correlations were handled with an AR(1) model. Contrast images obtained from each subject (average responses either for visual, auditory or tactile stim ...
... boxcar functions (convolved with HRF), one for each stimulus type. The fMRI time series were high-pass filtered with cut-off at 1/342 s, and serial correlations were handled with an AR(1) model. Contrast images obtained from each subject (average responses either for visual, auditory or tactile stim ...
Neural coding of behavioral relevance in parietal cortex
... Other studies have examined the link between neuronal and behavioral modulation less directly. For example, it has been known for a long time that a difficult task could increase the responses of neurons, presumably by demanding more attention to relevant stimuli [28]. Other experiments suggest that ...
... Other studies have examined the link between neuronal and behavioral modulation less directly. For example, it has been known for a long time that a difficult task could increase the responses of neurons, presumably by demanding more attention to relevant stimuli [28]. Other experiments suggest that ...
face-specific responses from the human inferior occipito
... The field pattern drawn at the same latency for the 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 differ ...
... The field pattern drawn at the same latency for the 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 differ ...
On-center off surround ganglion cells
... Intermediate station – all sensory signals (except olfactory) go through different nuclei of the thalamus. Dynamic information processing: steering attention and fast largecelled pathway reacting to motion. Retroactive projections V1=>LGN are an order of magnitude more numerous than LGN=>V1 (r ...
... Intermediate station – all sensory signals (except olfactory) go through different nuclei of the thalamus. Dynamic information processing: steering attention and fast largecelled pathway reacting to motion. Retroactive projections V1=>LGN are an order of magnitude more numerous than LGN=>V1 (r ...
Selective visual attention and perceptual coherence
... humans – there is a coarse representation of spatial topography, and feature selectivity is somewhat diminished [41–43]. LIP has been shown to represent both voluntary and stimulus-driven contributions to attentional priority. A rapid ‘on-response’ is observed when a stimulus is flashed within the R ...
... humans – there is a coarse representation of spatial topography, and feature selectivity is somewhat diminished [41–43]. LIP has been shown to represent both voluntary and stimulus-driven contributions to attentional priority. A rapid ‘on-response’ is observed when a stimulus is flashed within the R ...
Neurophysiology: Sensing and categorizing
... under standard notions of M1 physiology. Salinas and Romo [8] present two arguments against the latter interpretation, both of which are strongly suggestive, but neither of which is completely compelling. Firstly, they performed control experiments on a number of identified ‘categorical’ neurons, in ...
... under standard notions of M1 physiology. Salinas and Romo [8] present two arguments against the latter interpretation, both of which are strongly suggestive, but neither of which is completely compelling. Firstly, they performed control experiments on a number of identified ‘categorical’ neurons, in ...
What and Where Pathways
... have receptive fields located at positions A’, B’, and C’ on the retina. This mapping can be determined by recording from neurons encountered along an oblique electrode track. Also, neurons along a perpendicular electrode track all have their receptive fields on about the same place on the retina. ...
... have receptive fields located at positions A’, B’, and C’ on the retina. This mapping can be determined by recording from neurons encountered along an oblique electrode track. Also, neurons along a perpendicular electrode track all have their receptive fields on about the same place on the retina. ...
The Physiology of the Senses Lecture 6 Visually Guided Actions
... onto strips behind the central sulcus. ...
... onto strips behind the central sulcus. ...
The Neural Fate of Consciously Perceived and Missed Events in the
... by the subjects (Miss) still activated the PPA more than when no scenes were presented (CR) [Miss ⬎ CR, t(18) ⫽ 2.19, p ⬍ 0.05], suggesting that the PPA responds to scenes even when they are not consciously perceived. Moreover, this subliminal PPA activation was enhanced when subjects consciously pe ...
... by the subjects (Miss) still activated the PPA more than when no scenes were presented (CR) [Miss ⬎ CR, t(18) ⫽ 2.19, p ⬍ 0.05], suggesting that the PPA responds to scenes even when they are not consciously perceived. Moreover, this subliminal PPA activation was enhanced when subjects consciously pe ...
day2-morning2
... of a stimulus or message- both the auditory and visual message. • The hearing process is based on a complex set of physical interactions between the ear and the brain. • Besides using the hearing mechanism, we listen through our visual system. We observe a person’s facial expression, posture, moveme ...
... of a stimulus or message- both the auditory and visual message. • The hearing process is based on a complex set of physical interactions between the ear and the brain. • Besides using the hearing mechanism, we listen through our visual system. We observe a person’s facial expression, posture, moveme ...
T2 - Center for Neural Basis of Cognition
... Remapping in humans produces activity in the hemisphere ipsilateral to the stimulus. Remapped activity is present in human parietal, extrastriate and striate cortex. Remapped visual signals are more prevalent at higher levels of the visual system hierarchy. Remapping occurs in parietal and visual co ...
... Remapping in humans produces activity in the hemisphere ipsilateral to the stimulus. Remapped activity is present in human parietal, extrastriate and striate cortex. Remapped visual signals are more prevalent at higher levels of the visual system hierarchy. Remapping occurs in parietal and visual co ...