Limitations of Neural Map Topography for Decoding Spatial
... points in the brain. It is often assumed that this “topography” of wiring is essential for decoding sensory stimuli. However, here we show in the developing zebrafish that topographic decoding performs very poorly compared with methods that do not rely on topography. This suggests that, although wir ...
... points in the brain. It is often assumed that this “topography” of wiring is essential for decoding sensory stimuli. However, here we show in the developing zebrafish that topographic decoding performs very poorly compared with methods that do not rely on topography. This suggests that, although wir ...
Role of the Nervous System in the Control of Vascular
... blocked, there remains in many tissues a marked vascular tone that we can call basal tone. For instanee, in resting skeletal muscles blood is normally around 3 to 5 ml. per 100 ml. of tissue per minute, inereasing to roughly twice the value on regional vasoconstrictor fiber block. It can, however, b ...
... blocked, there remains in many tissues a marked vascular tone that we can call basal tone. For instanee, in resting skeletal muscles blood is normally around 3 to 5 ml. per 100 ml. of tissue per minute, inereasing to roughly twice the value on regional vasoconstrictor fiber block. It can, however, b ...
Fast and slow neurons in the nucleus of the
... Spatio-temporal contour plots for both the preferred and anti-preferred directions were obtained for all neurons. Because, for most neurons, large®eld motion in the preferred direction elicits excitation and motion in the anti-preferred direction inhibits the spontaneous activity, we refer to these ...
... Spatio-temporal contour plots for both the preferred and anti-preferred directions were obtained for all neurons. Because, for most neurons, large®eld motion in the preferred direction elicits excitation and motion in the anti-preferred direction inhibits the spontaneous activity, we refer to these ...
A Circuit for Detection of Interaural Time Differences in the Brain
... Figure 1. Transverse section through barn owl brain stem stained with monoclonal antibody that recognizes calretinen. This photomicrograph shows both the cochlear nuclei (NA, NM) and the nucleus laminaris (NL). The medial vestibular nucleus (*) forms the medial border and the cerebellar peduncle (CB ...
... Figure 1. Transverse section through barn owl brain stem stained with monoclonal antibody that recognizes calretinen. This photomicrograph shows both the cochlear nuclei (NA, NM) and the nucleus laminaris (NL). The medial vestibular nucleus (*) forms the medial border and the cerebellar peduncle (CB ...
Suppression of Neural Responses to Nonoptimal Stimuli Correlates
... one hand, some studies suggest that inhibition has no role in sharpening tuning selectivity. This claim appears to be supported by the following findings: the tuning of excitation and inhibition, recorded in layer 4 cortical neurons intracellularly, appear to be very similar (Carandini and Ferster 2 ...
... one hand, some studies suggest that inhibition has no role in sharpening tuning selectivity. This claim appears to be supported by the following findings: the tuning of excitation and inhibition, recorded in layer 4 cortical neurons intracellularly, appear to be very similar (Carandini and Ferster 2 ...
C ontribution of the anterior cingulate cortex to laser
... allowed the laser beam to be directed to their left paw. The pre-CS random activity was minimal throughout the trials (Fig. 3A). Some random movements could be recorded during the presentation of CS alone. Occasionally, a small orienting response occurred immediately after the CS. The rats did not s ...
... allowed the laser beam to be directed to their left paw. The pre-CS random activity was minimal throughout the trials (Fig. 3A). Some random movements could be recorded during the presentation of CS alone. Occasionally, a small orienting response occurred immediately after the CS. The rats did not s ...
Slide 1
... Two-point discrimination • Two-point discrimination – Min distance as which 2 stimuli can be resolved as distinct – Determine if one or more points are stimulated ...
... Two-point discrimination • Two-point discrimination – Min distance as which 2 stimuli can be resolved as distinct – Determine if one or more points are stimulated ...
Printable Activities
... that extend across their body. Mollusks have five cerebral ganglia and two nervous cords glands. Arthropods have a pair of dorsal root ganglia in the head, connected to a pair of nerve fibers, and a ganglion per segment and sensory cells. Vertebrates have a ventral nervous system, as in chordates, w ...
... that extend across their body. Mollusks have five cerebral ganglia and two nervous cords glands. Arthropods have a pair of dorsal root ganglia in the head, connected to a pair of nerve fibers, and a ganglion per segment and sensory cells. Vertebrates have a ventral nervous system, as in chordates, w ...
Auditory Nerve Stochasticity Impedes Category Learning: the Role
... time jitter obscure the similarities between the AN spike rasters in response to different ...
... time jitter obscure the similarities between the AN spike rasters in response to different ...
Temporal Firing Patterns of Purkinje Cells in the Cerebellar Ventral
... consideration. If the firing patterns can be well reconstructed by an inverse dynamics representation, we can understand not only what information is encoded in that neural activity but also which portion of the motor command is still lacking. This might allow us to suggest what downstream neural st ...
... consideration. If the firing patterns can be well reconstructed by an inverse dynamics representation, we can understand not only what information is encoded in that neural activity but also which portion of the motor command is still lacking. This might allow us to suggest what downstream neural st ...
Nervous System and Behavior Lab BACKGROUND
... communicate with one another by sending chemicals across gaps (synapses) between neighboring nerve cells, similar to “higher” animals, but hydra nerve cells send signals in all directions at once. This is an inefficient kind of nervous system and impulses travel very much more slowly than in higher ...
... communicate with one another by sending chemicals across gaps (synapses) between neighboring nerve cells, similar to “higher” animals, but hydra nerve cells send signals in all directions at once. This is an inefficient kind of nervous system and impulses travel very much more slowly than in higher ...
SENSE AND THE SINGLE NEURON: Probing the Physiology of
... in principle, open to experimental test, but for some criteria, no experimental test may be immediately available, owing to current technical limitations. To the extent that these criteria are fulfilled, we would feel increasingly certain about a proposed link between neural activity and perception. ...
... in principle, open to experimental test, but for some criteria, no experimental test may be immediately available, owing to current technical limitations. To the extent that these criteria are fulfilled, we would feel increasingly certain about a proposed link between neural activity and perception. ...
CLASSICAL AND INSTRUMENTAL CONDITIONING: THE
... findings was obtained by Soltysik, who has shown that the "indirect" connections of Wyrwicka were mediated by the drive or emotional tenter - fear center in defensive reflexes and hunger center in alimentary reflexes (Fig. 4, right). My present concept concerning instrumental conditioning is basical ...
... findings was obtained by Soltysik, who has shown that the "indirect" connections of Wyrwicka were mediated by the drive or emotional tenter - fear center in defensive reflexes and hunger center in alimentary reflexes (Fig. 4, right). My present concept concerning instrumental conditioning is basical ...
GENERAL CONCLUSIONS
... How do local circuits of the honeybee AL transform the RN responses into temporal complex and contrast-enhanced representations of odors at the output level? Using pharmacological tools such as the chloride channel blocker picrotoxin (PTX), the inhibitory interactions within the AL could be investig ...
... How do local circuits of the honeybee AL transform the RN responses into temporal complex and contrast-enhanced representations of odors at the output level? Using pharmacological tools such as the chloride channel blocker picrotoxin (PTX), the inhibitory interactions within the AL could be investig ...
Repetition and the brain: neural models of stimulus
... usually recorded above the scalp. These effects reflect changes in the amplitude and/or synchrony of local field potentials (LFPs) caused by transmembrane currents in large numbers of neurons. Most EEG studies examine event-related potentials (ERPs), which reflect changes in electrical potential dur ...
... usually recorded above the scalp. These effects reflect changes in the amplitude and/or synchrony of local field potentials (LFPs) caused by transmembrane currents in large numbers of neurons. Most EEG studies examine event-related potentials (ERPs), which reflect changes in electrical potential dur ...
Repetition and the brain: neural models of stimulus
... usually recorded above the scalp. These effects reflect changes in the amplitude and/or synchrony of local field potentials (LFPs) caused by transmembrane currents in large numbers of neurons. Most EEG studies examine event-related potentials (ERPs), which reflect changes in electrical potential dur ...
... usually recorded above the scalp. These effects reflect changes in the amplitude and/or synchrony of local field potentials (LFPs) caused by transmembrane currents in large numbers of neurons. Most EEG studies examine event-related potentials (ERPs), which reflect changes in electrical potential dur ...
... In this study we found that in electrophysiologically identified EC layer V principal cells17, bath application of the cholinergic agent carbachol (CCh) (5 mM, n ¼ 38; 10 mM, n ¼ 49) blocked the slow afterhyperpolarization that follows a train of action potentials and, in most cases (84% and 98% in ...
excitation and inhibition of the reflex eye withdrawal of the crab
... (2) the interval between the spikes in the train bears little or no relation to the response time, and (3) two consecutive stimuli reveal a short period of supernormality lasting from about 2 until about 10 msec, after the impulse. Stimulation at the 'excitatory' point during the spontaneous dischar ...
... (2) the interval between the spikes in the train bears little or no relation to the response time, and (3) two consecutive stimuli reveal a short period of supernormality lasting from about 2 until about 10 msec, after the impulse. Stimulation at the 'excitatory' point during the spontaneous dischar ...
Spatial and temporal frequency selectivity of neurons in
... laminar distribution of the recorded units was also determined, based on cytoarchitectural criteria illustrated by Bourne & Rosa (2006). ...
... laminar distribution of the recorded units was also determined, based on cytoarchitectural criteria illustrated by Bourne & Rosa (2006). ...
The functional role of GABA and glycine in monaural and binaural
... N = 107) and glycine (92%; N = 118). Both neurotransmitters appear involved in several functional contexts, but to different degrees. Bicuculline-induced increases of discharge activity (99% of cells; N = 191) were accompanied by changes of temporal response patterns in 35 % of neurons distributed t ...
... N = 107) and glycine (92%; N = 118). Both neurotransmitters appear involved in several functional contexts, but to different degrees. Bicuculline-induced increases of discharge activity (99% of cells; N = 191) were accompanied by changes of temporal response patterns in 35 % of neurons distributed t ...