neurons that transmit messages from sensory receptors
... a method of brain imaging that places a person in a magnetic field and uses radio waves to cause the brain to emit signals that reveal shifts in the flow of blood which, in turn, indicate brain activity ...
... a method of brain imaging that places a person in a magnetic field and uses radio waves to cause the brain to emit signals that reveal shifts in the flow of blood which, in turn, indicate brain activity ...
Synapse formation in developing neural circuits.
... than NMJs, in closed apposition to one another and packed at very high densities. This made their visualization with the methods used during nineteenth century downright impossible and triggered the postulation of the ‘‘reticular theory’’: the idea that the nervous system lacked functional separatio ...
... than NMJs, in closed apposition to one another and packed at very high densities. This made their visualization with the methods used during nineteenth century downright impossible and triggered the postulation of the ‘‘reticular theory’’: the idea that the nervous system lacked functional separatio ...
Anatomy - Nervous System Test Chpt 9
... 1. What is the function of the nervous system? a. sensory input b. integration c. motor output d. all of the above 2. What is the smallest structural and functional unit of the nervous system? a. nerve b. neuron c. brain d. spinal cord 3. What begins when a neuron is stimulated by another neuron in ...
... 1. What is the function of the nervous system? a. sensory input b. integration c. motor output d. all of the above 2. What is the smallest structural and functional unit of the nervous system? a. nerve b. neuron c. brain d. spinal cord 3. What begins when a neuron is stimulated by another neuron in ...
Nothing can be coincidence: synaptic inhibition and plasticity in the
... Figure 1. Spontaneous firing, depolarization block and inhibition in cerebellar nuclear cells. (a) Spontaneous firing in a cerebellar nuclear cell isolated from the mouse cerebellum, in quasi-physiological extracellular and intracellular solutions (control). With voltage-gated Na+ channels blocked b ...
... Figure 1. Spontaneous firing, depolarization block and inhibition in cerebellar nuclear cells. (a) Spontaneous firing in a cerebellar nuclear cell isolated from the mouse cerebellum, in quasi-physiological extracellular and intracellular solutions (control). With voltage-gated Na+ channels blocked b ...
Spike-Wave Complexes and Fast Components of Cortically
... Timofeev, Igor, François Grenier, and Mircea Steriade. Spikewave complexes and fast components of cortically generated seizures. IV. Paroxysmal fast runs in cortical and thalamic neurons. J. Neurophysiol. 80: 1495–1513, 1998. In the preceding papers of this series, we have analyzed the cellular pat ...
... Timofeev, Igor, François Grenier, and Mircea Steriade. Spikewave complexes and fast components of cortically generated seizures. IV. Paroxysmal fast runs in cortical and thalamic neurons. J. Neurophysiol. 80: 1495–1513, 1998. In the preceding papers of this series, we have analyzed the cellular pat ...
Medical Image Segmentation Using Artificial Neural Networks
... neuron in the PCNN. The values of outputs are all set to zero. A neuron that has an external stimulus will fire in the first iteration. In this situation, the threshold values are high and it will take several iterations in which neurons are allowed to fire again. This iterative process will continu ...
... neuron in the PCNN. The values of outputs are all set to zero. A neuron that has an external stimulus will fire in the first iteration. In this situation, the threshold values are high and it will take several iterations in which neurons are allowed to fire again. This iterative process will continu ...
An ontology-based search engine for digital
... The Author(s) 2017. This article is an open access publication ...
... The Author(s) 2017. This article is an open access publication ...
- Stem-cell and Brain Research Institute
... A central issue in cognitive neuroscience today concerns how distributed neural networks in the brain that are used in language learning and processing can be involved in non-linguistic cognitive sequence learning. This issue is informed by a wealth of functional neurophysiology studies of sentence ...
... A central issue in cognitive neuroscience today concerns how distributed neural networks in the brain that are used in language learning and processing can be involved in non-linguistic cognitive sequence learning. This issue is informed by a wealth of functional neurophysiology studies of sentence ...
PDF
... or ‘pioneer’ neuron, blocks the migration of follower FBMNs into r5. This demonstrates that the pioneer neuron and its axon are crucial to the early migration of FBMNs. Later migration from r5 to r6 is not dependent on pioneer neurons but on the medial longitudinal fasciculus (MLF), a bundle of axon ...
... or ‘pioneer’ neuron, blocks the migration of follower FBMNs into r5. This demonstrates that the pioneer neuron and its axon are crucial to the early migration of FBMNs. Later migration from r5 to r6 is not dependent on pioneer neurons but on the medial longitudinal fasciculus (MLF), a bundle of axon ...
J. Comp. Physiol. A
... Stumpner 1998). The ascending neuron 1 (AN1) receives frequency-dependent inhibitions at low (<10 kHz) and high (>20 kHz) frequencies, which are seen as clear inhibitory postsynaptic potentials (IPSPs) (Stumpner 1997) and are eliminated following application of picrotoxin (PTX, Stumpner 1998), a com ...
... Stumpner 1998). The ascending neuron 1 (AN1) receives frequency-dependent inhibitions at low (<10 kHz) and high (>20 kHz) frequencies, which are seen as clear inhibitory postsynaptic potentials (IPSPs) (Stumpner 1997) and are eliminated following application of picrotoxin (PTX, Stumpner 1998), a com ...
MOTION DETECTION MECHANISMS
... The physical phenomenon ‘motion’ can easily be defined as an object’s change in position over time. An animal that can detect moving predators, prey, and mates, has a clear survival advantage and this evolutionary pressure has presumably led to the development of neural mechanisms sensitive to motio ...
... The physical phenomenon ‘motion’ can easily be defined as an object’s change in position over time. An animal that can detect moving predators, prey, and mates, has a clear survival advantage and this evolutionary pressure has presumably led to the development of neural mechanisms sensitive to motio ...
The Central Nervous System
... • Rapid opening of voltage-gated Na+ channels • Na+ entry causes rapid depolarization ...
... • Rapid opening of voltage-gated Na+ channels • Na+ entry causes rapid depolarization ...
Scene perception: inferior temporal cortex neurons encode the
... enabling defined stimuli to be presented simultaneously in defined positions in a well-controlled way, and for the response of a neuron to be measured to each stimulus when presented alone. Moreover, the stimuli were chosen such that only one of the stimuli activated the particular neuron from which r ...
... enabling defined stimuli to be presented simultaneously in defined positions in a well-controlled way, and for the response of a neuron to be measured to each stimulus when presented alone. Moreover, the stimuli were chosen such that only one of the stimuli activated the particular neuron from which r ...
Hearing in a diurnal, mute butterfly, Morpho peleides
... that had been previously injected with C&C (Chauthani and Callahan, 1966) fixative (n ⫽ 8). The thoracic nervous system was exposed using the dorsal dissection approach previously described in Yack and Fullard (1990). Nerve IIN1c was followed from the pterothoracic ganglion to the VO. As the dissecti ...
... that had been previously injected with C&C (Chauthani and Callahan, 1966) fixative (n ⫽ 8). The thoracic nervous system was exposed using the dorsal dissection approach previously described in Yack and Fullard (1990). Nerve IIN1c was followed from the pterothoracic ganglion to the VO. As the dissecti ...
KISHORE Aswathy - School of Computing
... a scene where everything is either black or white, an object in a colour such as bright yellow would draw our attention to it. Similarly, suppose we are shown a scene in which an object each is present for each of the seven colours. If we are instructed to look at the yellow object in the scene, our ...
... a scene where everything is either black or white, an object in a colour such as bright yellow would draw our attention to it. Similarly, suppose we are shown a scene in which an object each is present for each of the seven colours. If we are instructed to look at the yellow object in the scene, our ...
9 Propagated Signaling: The Action Potential
... conductance is directly proportional to the number of open Na+ and K+ channels, we can gain insight into how membrane voltage controls channel opening by calculating the amplitudes and time courses of the Na+ and K+ conductance changes in response to voltage-clamp depolarizations (Box 9-2). Measurem ...
... conductance is directly proportional to the number of open Na+ and K+ channels, we can gain insight into how membrane voltage controls channel opening by calculating the amplitudes and time courses of the Na+ and K+ conductance changes in response to voltage-clamp depolarizations (Box 9-2). Measurem ...
Integrated model of visual processing
... and 2D analysis of luminance borders. The next level is the 2 1 / 2 D sketch that encodes the position and orientation in depth of small surface elements in 3D and the final stage is the 3D representation that corresponds to the representation of objects in three dimensions. Thus, it is a model base ...
... and 2D analysis of luminance borders. The next level is the 2 1 / 2 D sketch that encodes the position and orientation in depth of small surface elements in 3D and the final stage is the 3D representation that corresponds to the representation of objects in three dimensions. Thus, it is a model base ...
invariant face and object recognition in the visual system
... the visual field (Tovee et al., 1994; cf earlier work by Gross, 1973, Gross et al., 1985). Some of these neurons even have relatively view-invariant responses, responding to different views of the same face but not of other faces (Hasselmo et al., 1989a). It is clearly important that invariance in t ...
... the visual field (Tovee et al., 1994; cf earlier work by Gross, 1973, Gross et al., 1985). Some of these neurons even have relatively view-invariant responses, responding to different views of the same face but not of other faces (Hasselmo et al., 1989a). It is clearly important that invariance in t ...
Feedforward and feedback inhibition in neostriatal GABAergic spiny
... neurons of about 1 mV or IPSCs over 100 pA, and short bursts of action potentials in FS interneurons led to compound IPSPs that could summate up to 7 mV or several hundred pA in spiny neurons (Koós and Tepper, 1999; Koós et al., 2004). The IPSP is functionally strong enough to delay or completely su ...
... neurons of about 1 mV or IPSCs over 100 pA, and short bursts of action potentials in FS interneurons led to compound IPSPs that could summate up to 7 mV or several hundred pA in spiny neurons (Koós and Tepper, 1999; Koós et al., 2004). The IPSP is functionally strong enough to delay or completely su ...
Neuroscience Newsletter, May 2015 - MSc/PhD/MD
... croissant” and the “Ofiomosaic model”, based on light microscopy imaging implied a growth from the outer surface of the myelin sheath and the involvement of the axon membrane rotation as an active force driving the myelination (Sobottka et al., 2011, Ioannidou et al., 2012). However, due to the phys ...
... croissant” and the “Ofiomosaic model”, based on light microscopy imaging implied a growth from the outer surface of the myelin sheath and the involvement of the axon membrane rotation as an active force driving the myelination (Sobottka et al., 2011, Ioannidou et al., 2012). However, due to the phys ...
rEvIEW - McLoon Lab
... to mature further. It is important to point out that astrocyte processes do not fully insulate a synapse from the surrounding environment but, instead, allow some flow into and out of the synaptic cleft. For example, at hippocampal synapses, regardless of their size, there are astrocyte-free perimet ...
... to mature further. It is important to point out that astrocyte processes do not fully insulate a synapse from the surrounding environment but, instead, allow some flow into and out of the synaptic cleft. For example, at hippocampal synapses, regardless of their size, there are astrocyte-free perimet ...
Chapter 3 - University of South Alabama
... unusual body odor. 6-OH-DA may be converted into a hallucinogen (2-hydroxy 4,5 dimethoxyphenethanolamine). Revision 2006 PSB ...
... unusual body odor. 6-OH-DA may be converted into a hallucinogen (2-hydroxy 4,5 dimethoxyphenethanolamine). Revision 2006 PSB ...
Exam II Questions / Answers
... plasma membrane in the direction of their electro-chemical gradient, creating electrical currents and voltage changes across the membrane according to Ohm’s law: V= I x R ...
... plasma membrane in the direction of their electro-chemical gradient, creating electrical currents and voltage changes across the membrane according to Ohm’s law: V= I x R ...