Canonical computations of cerebral cortex
... computation of selectivity; and a recurrent computation of gain in which, given sufficiently strong external input, perhaps from multiple sources, intracortical input largely, but not completely, cancels this external input. This operation leads to many characteristic cortical nonlinearities in inte ...
... computation of selectivity; and a recurrent computation of gain in which, given sufficiently strong external input, perhaps from multiple sources, intracortical input largely, but not completely, cancels this external input. This operation leads to many characteristic cortical nonlinearities in inte ...
Brain Day Volunteer Instructor Guide
... the movement of the eye. The eyelid protects the surface of the eye. Tears clean the eye’s surface. The surface of the eye, the cornea, acts like a filter. The iris and pupil adjust to the amount of light going into the eye. The lens focuses the image you are looking at. When light enters the eye th ...
... the movement of the eye. The eyelid protects the surface of the eye. Tears clean the eye’s surface. The surface of the eye, the cornea, acts like a filter. The iris and pupil adjust to the amount of light going into the eye. The lens focuses the image you are looking at. When light enters the eye th ...
This Week in The Journal - The Journal of Neuroscience
... SMAD1/5/8 and p38, two downstream mediators of BMPR signaling. This effect may have resulted from a redistribution of BMPR1b into lipid rafts, which are thought to facilitate receptor-mediated activation of downstream signaling complexes. Indeed, the amount of BMPR1b present in lipid raft fractions ...
... SMAD1/5/8 and p38, two downstream mediators of BMPR signaling. This effect may have resulted from a redistribution of BMPR1b into lipid rafts, which are thought to facilitate receptor-mediated activation of downstream signaling complexes. Indeed, the amount of BMPR1b present in lipid raft fractions ...
Click here to see an experiment showing what part
... slowing response time and impairing judgment, but there is evidence that there are LONG TERM AFFECTS!!!! Research shows that alcohol consumption before the brain has finished developing leads to less development. Remember the teen brain still has a lot of developing to go and that the brain hasn’t f ...
... slowing response time and impairing judgment, but there is evidence that there are LONG TERM AFFECTS!!!! Research shows that alcohol consumption before the brain has finished developing leads to less development. Remember the teen brain still has a lot of developing to go and that the brain hasn’t f ...
Pulmonary gas exchange in elderly subjects
... performed once a week and samples, the PO2 and PCO2 of which were unknown to the laboratory staff, were analysed. On 21 samples, the relationship between measured PO2 (y) and true PO2 (x) was y=1.009×+0.03 kPa (r=0.992). As a consequence, no correction factor was used for the measured values. It is ...
... performed once a week and samples, the PO2 and PCO2 of which were unknown to the laboratory staff, were analysed. On 21 samples, the relationship between measured PO2 (y) and true PO2 (x) was y=1.009×+0.03 kPa (r=0.992). As a consequence, no correction factor was used for the measured values. It is ...
The Ten-Percent Myth
... average, job advancement, or the pursuit of a cure for cancer or the Great American Novel. So, if the 10-percent myth is that implausible, how did it arise? My attempts to track down the origins of the 10-percent myth have not discovered any smoking guns, but some tantalizing clues have emerged (mor ...
... average, job advancement, or the pursuit of a cure for cancer or the Great American Novel. So, if the 10-percent myth is that implausible, how did it arise? My attempts to track down the origins of the 10-percent myth have not discovered any smoking guns, but some tantalizing clues have emerged (mor ...
Role of Basal Ganglia in the Regulation of Motor Activities by the
... The onset of voluntary motor activity takes place under the influence of cerebral cortex. The basal ganglia is capable of controlling these motor activities due to the presence of neuronal circuits between the basal ganglia and the motor cortex and supplementary motor area. This neuronal circuit inc ...
... The onset of voluntary motor activity takes place under the influence of cerebral cortex. The basal ganglia is capable of controlling these motor activities due to the presence of neuronal circuits between the basal ganglia and the motor cortex and supplementary motor area. This neuronal circuit inc ...
Some Analogies Between Visual Cortical and Genetic Maps
... the complementary stranQsof the DNA and sheared them into fragments of about 400 nucleotides in length. Then they measured the time required for the complementary strands to reassociate at different concentrations. They found that much of the DNA reassociated far more rapidly and at lower concentrat ...
... the complementary stranQsof the DNA and sheared them into fragments of about 400 nucleotides in length. Then they measured the time required for the complementary strands to reassociate at different concentrations. They found that much of the DNA reassociated far more rapidly and at lower concentrat ...
The Science of Psychology
... A newspaper-style web page that contains interesting articles, news reports, activities, and commentary on brain-related issues. Brain Function and Pathology: http://www.waiting.com/brainfunction.html Concise table of diagrams of brain structures, descriptions of brain functions, and descriptions of ...
... A newspaper-style web page that contains interesting articles, news reports, activities, and commentary on brain-related issues. Brain Function and Pathology: http://www.waiting.com/brainfunction.html Concise table of diagrams of brain structures, descriptions of brain functions, and descriptions of ...
Neural evidence for the interplay between language, gesture, and
... The finding of a lexical modulation of MEPs to words versus non-words with the same acoustic properties (Fadiga et al., 2002) for instance shows that speech sounds are not invariantly mapped onto motor representations, but are modulated by higher level processes (see also Wilson & Iacoboni, 2006). Al ...
... The finding of a lexical modulation of MEPs to words versus non-words with the same acoustic properties (Fadiga et al., 2002) for instance shows that speech sounds are not invariantly mapped onto motor representations, but are modulated by higher level processes (see also Wilson & Iacoboni, 2006). Al ...
Cerebral Glucose Metabolism in Obsessive
... anxiety activates the ventral prefrontal regions and the left amygdala, but the reason behind this is unknown. ...
... anxiety activates the ventral prefrontal regions and the left amygdala, but the reason behind this is unknown. ...
Neurophysiological Aspects of Song Pattern Recognition and Sound
... FIG. 5. Effect of pulse rise time on latency in auditory receptors of Locusta migraloria. (A) Scheme demonstrating, why slowly rising ramps in theory evoke larger latency differences between two given intensities than steep onsets. (B) shows that a steeper response function (see inserted 10 dB diffe ...
... FIG. 5. Effect of pulse rise time on latency in auditory receptors of Locusta migraloria. (A) Scheme demonstrating, why slowly rising ramps in theory evoke larger latency differences between two given intensities than steep onsets. (B) shows that a steeper response function (see inserted 10 dB diffe ...
The Physiology of the Senses Lecture 6 Visually Guided Actions
... corollary discharge. This corollary discharge originates in the SC and is directed to the FEF (and to PF and PEF). The corollary discharge shifts the activity to the group of neurons that would have been activated if A and B were still visible. In the normal world in which visual targets are continu ...
... corollary discharge. This corollary discharge originates in the SC and is directed to the FEF (and to PF and PEF). The corollary discharge shifts the activity to the group of neurons that would have been activated if A and B were still visible. In the normal world in which visual targets are continu ...
Dopamine control of pyramidal neuron activity in the primary motor
... Indeed, Gaspar et al. (1991) suggested the presence of such an innervation in the most superficial layers in human M1 using a tyrosine hydroxylase (TH) immunostaining to visualize monoaminergic fibers. In rats, Descarries et al. (1987) showed a dopaminergic innervation in cortical areas such as the ...
... Indeed, Gaspar et al. (1991) suggested the presence of such an innervation in the most superficial layers in human M1 using a tyrosine hydroxylase (TH) immunostaining to visualize monoaminergic fibers. In rats, Descarries et al. (1987) showed a dopaminergic innervation in cortical areas such as the ...
Chapter 2
... autonomic nervous systems – Autonomic nervous system subdivided into sympathetic and parasympathetic nervous systems ...
... autonomic nervous systems – Autonomic nervous system subdivided into sympathetic and parasympathetic nervous systems ...
Contributions of cortical feedback to sensory processing in primary
... long-range glutamatergic excitatory neurons, and synaptic physiology), but it remains theoretical to what extent or how V1 neurons implement prediction in their ion channels, membrane voltage, and synapses (see Fiorillo, 2008). Furthermore, (2) how does the abstract language spoken by higher areas t ...
... long-range glutamatergic excitatory neurons, and synaptic physiology), but it remains theoretical to what extent or how V1 neurons implement prediction in their ion channels, membrane voltage, and synapses (see Fiorillo, 2008). Furthermore, (2) how does the abstract language spoken by higher areas t ...
... affect. In the next study we want to add the verbal dimension and investigate how humans perceive the emotions transmitted by a talking face. In a face-to-face communication verbal and non-verbal features transmitting emotional meaning build a complex multidimensional stimulus construct. In our thir ...
Representation of Acoustic Communication Signals
... Information theory and systems analysis provide quantitative measures for the signal-processing capabilities of a neural system. In particular, the information contained in the spike trains of sensory afferents about an external stimulus can be estimated using stimulus reconstruction methods (Bialek ...
... Information theory and systems analysis provide quantitative measures for the signal-processing capabilities of a neural system. In particular, the information contained in the spike trains of sensory afferents about an external stimulus can be estimated using stimulus reconstruction methods (Bialek ...
Motor Cortex, Basal Ganglia, Cerebellum
... 2. Associated with assembling movements into coordinated actions. Lesions impair ability to develop appropriate sequences of muscle contractions 3. Participates in movements that involve several joints and/or are bilateral (i.e., complex sequential movements) ...
... 2. Associated with assembling movements into coordinated actions. Lesions impair ability to develop appropriate sequences of muscle contractions 3. Participates in movements that involve several joints and/or are bilateral (i.e., complex sequential movements) ...
Introduction to the Brain presenter notes
... Slide 19: Definition of tolerance When drugs such as heroin are used repeatedly over time, tolerance may develop. Tolerance occurs when the person no longer responds to the drug in the way that person initially responded. Stated another way, it takes a higher dose of the drug to achieve the same lev ...
... Slide 19: Definition of tolerance When drugs such as heroin are used repeatedly over time, tolerance may develop. Tolerance occurs when the person no longer responds to the drug in the way that person initially responded. Stated another way, it takes a higher dose of the drug to achieve the same lev ...
1 - U-System
... of temporal/parietal lobes (frontal eye fields may be involved) - vertical movements triggered bilaterally - unilateral cortical damage impairs horizontal pursuit movements in both directions, but impairment is greater when looking to ipsilateral side - pathway from cortex to abducens involves flocc ...
... of temporal/parietal lobes (frontal eye fields may be involved) - vertical movements triggered bilaterally - unilateral cortical damage impairs horizontal pursuit movements in both directions, but impairment is greater when looking to ipsilateral side - pathway from cortex to abducens involves flocc ...
Chapter 21: Attention
... What happens to attention under normal conditions? Assumption: Attention changes location prior to eye movement Wurtz, Goldberg, and Robinson Record neural activity from several brain regions Slide 14 Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright © 2007 Lippincott ...
... What happens to attention under normal conditions? Assumption: Attention changes location prior to eye movement Wurtz, Goldberg, and Robinson Record neural activity from several brain regions Slide 14 Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright © 2007 Lippincott ...
Time perception
Time perception is a field of study within psychology and neuroscience that refers to the subjective experience of time, which is measured by someone's own perception of the duration of the indefinite and continuous unfolding of events. The perceived time interval between two successive events is referred to as perceived duration. Another person's perception of time cannot be directly experienced or understood, but it can be objectively studied and inferred through a number of scientific experiments. Time perception is a construction of the brain that is manipulable and distortable under certain circumstances. These temporal illusions help to expose the underlying neural mechanisms of time perception.Pioneering work, emphasizing species-specific differences, was conducted by Karl Ernst von Baer. Experimental work began under the influence of the psycho-physical notions of Gustav Theodor Fechner with studies of the relationship between perceived and measured time.