ATP-Sensitive K+ Channels in the Brain: Sensors of
... During seizure, the cerebral metabolic rates of O2 and glucose uptake increase more than under any other circumstance (2). This massive energy demand causes a rapid fall in ATP that, if prolonged, leads ultimately to irreversible cell damage (5) due to intracellular ionic derangements such as Na+ an ...
... During seizure, the cerebral metabolic rates of O2 and glucose uptake increase more than under any other circumstance (2). This massive energy demand causes a rapid fall in ATP that, if prolonged, leads ultimately to irreversible cell damage (5) due to intracellular ionic derangements such as Na+ an ...
Nerve Fiber Classification Nerve fibers are classified according to:
... Occurs when one or more presynaptic neurons transmit impulses in high frequency. ...
... Occurs when one or more presynaptic neurons transmit impulses in high frequency. ...
Chapter 5 Development
... Synaptic Pruning • Reduces the number of functional synapses • Influenced by neutrophins and functionality of the synapse ...
... Synaptic Pruning • Reduces the number of functional synapses • Influenced by neutrophins and functionality of the synapse ...
Quantitative morphological changes in neurons from the dorsal
... between both parameters, which does not disappear in the older animals. In 63.97%, 75.04%, 71.12%, and 53.35% of cases, modifications in somata size were accompanied by a similar change in nuclear size, and vice-versa. These data corroborate that found by de Lacalle et al. (1991) during the same per ...
... between both parameters, which does not disappear in the older animals. In 63.97%, 75.04%, 71.12%, and 53.35% of cases, modifications in somata size were accompanied by a similar change in nuclear size, and vice-versa. These data corroborate that found by de Lacalle et al. (1991) during the same per ...
Chapter 27 - Fullfrontalanatomy.com
... • Neurological disorders can also affect brain function. – Major depression is extreme and persistent sadness and loss of interest in pleasurable activities. – Bipolar disorder involves extreme mood swings. – Alzheimer’s disease causes mental deterioration. ...
... • Neurological disorders can also affect brain function. – Major depression is extreme and persistent sadness and loss of interest in pleasurable activities. – Bipolar disorder involves extreme mood swings. – Alzheimer’s disease causes mental deterioration. ...
"Touch". In: Encyclopedia of Life Sciences (ELS)
... locations in the papillary ridges that form the fingerprint patterns. The anatomical arrangement of these receptors in the fingertip skin provides a precise grid for detection of spatial features such as Braille dots. The hairy skin of the hand dorsum and the other parts of the body senses touch with ...
... locations in the papillary ridges that form the fingerprint patterns. The anatomical arrangement of these receptors in the fingertip skin provides a precise grid for detection of spatial features such as Braille dots. The hairy skin of the hand dorsum and the other parts of the body senses touch with ...
fluctuations in somatosensory responsiveness and baseline firing
... administered in the second group of experiments (N⫽30 neurons). In the third group, injection manipulations with the empty device on the rat’s head were simulated (N⫽24 neurons). The latter two groups did not statistically differ from each other in any parameter, which made it possible to combine th ...
... administered in the second group of experiments (N⫽30 neurons). In the third group, injection manipulations with the empty device on the rat’s head were simulated (N⫽24 neurons). The latter two groups did not statistically differ from each other in any parameter, which made it possible to combine th ...
View Article
... fire, and the weight of the arm is enough to change the firing pattern. That could put it outside the envelope of what works.” And if Lehman tells the arm to do something it doesn’t understand? To make a fluid move instead of one built out of its vocabulary of bends, swivels, and pinches? “The arm w ...
... fire, and the weight of the arm is enough to change the firing pattern. That could put it outside the envelope of what works.” And if Lehman tells the arm to do something it doesn’t understand? To make a fluid move instead of one built out of its vocabulary of bends, swivels, and pinches? “The arm w ...
A Beginner`s Guide to the Mathematics of Neural Networks
... which determine the e ect communicating neurons will have on one another's membrane potential and ring state). Right: close-up of a typical synapse. decrease. In the rst case the arriving signal will increase the probability of the receiving neuron to start ring itself, therefore such a synapse i ...
... which determine the e ect communicating neurons will have on one another's membrane potential and ring state). Right: close-up of a typical synapse. decrease. In the rst case the arriving signal will increase the probability of the receiving neuron to start ring itself, therefore such a synapse i ...
A cellular mechanism for cortical associations: an organizing
... red) causes no dendritic spike (red) and has virtually no impact at the cell body (blue). (Right, middle) A somatic action potential evoked with somatic current injection (Istim, blue) invades the dendritic tree but still causes no dendritic spike. (Right, bottom) Combined injection of the same dend ...
... red) causes no dendritic spike (red) and has virtually no impact at the cell body (blue). (Right, middle) A somatic action potential evoked with somatic current injection (Istim, blue) invades the dendritic tree but still causes no dendritic spike. (Right, bottom) Combined injection of the same dend ...
Integrator or coincidence detector? The role of the cortical neuron
... and the coincidence-detection schemes. (A) The upper trace shows the membrane potential and action potentials of u simulated neuron performing temporal integration of postsynaptic potentials (PSPs). The input is simulated on average as a balanced distribution of excitatory ond inhibitov PSPs(uniform ...
... and the coincidence-detection schemes. (A) The upper trace shows the membrane potential and action potentials of u simulated neuron performing temporal integration of postsynaptic potentials (PSPs). The input is simulated on average as a balanced distribution of excitatory ond inhibitov PSPs(uniform ...
Neurons, Neural Networks, and Learning
... Threshold Boolean Functions and Threshold Neurons • Threshold (linearly separable) functions can be learned by a single threshold neuron • Non-threshold (nonlinearly separable) functions can not be learned by a single neuron. For learning of these functions a neural network created from threshold n ...
... Threshold Boolean Functions and Threshold Neurons • Threshold (linearly separable) functions can be learned by a single threshold neuron • Non-threshold (nonlinearly separable) functions can not be learned by a single neuron. For learning of these functions a neural network created from threshold n ...
Get PDF - Wiley Online Library
... ‘coincident detectors’ that require input from more than one OR to become active. Supporting this idea about the synthetic capacity of the olfactory cortex, Buck and Zhihua Zou have shown that binary odorant EMBO reports VOL 8 | NO 7 | 2007 629 ...
... ‘coincident detectors’ that require input from more than one OR to become active. Supporting this idea about the synthetic capacity of the olfactory cortex, Buck and Zhihua Zou have shown that binary odorant EMBO reports VOL 8 | NO 7 | 2007 629 ...
- Wiley Online Library
... neuropathological conditions, as irregular cellular proteolysis of physiologically important neuronal proteins has severe consequences for the integrity of neuronal structure and function. The disorder or breakdown of the endosomal/lysosomal proteolytic system has also been suggested to be of pathol ...
... neuropathological conditions, as irregular cellular proteolysis of physiologically important neuronal proteins has severe consequences for the integrity of neuronal structure and function. The disorder or breakdown of the endosomal/lysosomal proteolytic system has also been suggested to be of pathol ...
Powerpoint Slides
... • MRI is becoming very common; PET is specialized • MRI can obtain anatomical and functional images within same session • PET can resolve some areas of the brain better • in PET, isotopes can tagged to many possible tracers (e.g., glucose or dopamine) • PET can provide more direct measures about met ...
... • MRI is becoming very common; PET is specialized • MRI can obtain anatomical and functional images within same session • PET can resolve some areas of the brain better • in PET, isotopes can tagged to many possible tracers (e.g., glucose or dopamine) • PET can provide more direct measures about met ...
Autonomic Nervous System
... depending on the cell that bears the receptors. B. Adrenergic Neurons and Adrenergic Receptors 1. The adrenergic neurons release norepinephrine (Figure 15.7) and include most sympathetic postganglionic neurons. 2. The main types of adrenergic receptors are alpha and beta receptors. a. These receptor ...
... depending on the cell that bears the receptors. B. Adrenergic Neurons and Adrenergic Receptors 1. The adrenergic neurons release norepinephrine (Figure 15.7) and include most sympathetic postganglionic neurons. 2. The main types of adrenergic receptors are alpha and beta receptors. a. These receptor ...
Neuronal oscillations and brain wave dynamics in a LIF model
... we can see how his trembling hand instantly relaxes. It’s astounding that technology has come this far. But what strikes me the most, is what the neurologist in the studio tells us about the procedure: they have no idea how it works. One might expect that stimulating an already overactive region wou ...
... we can see how his trembling hand instantly relaxes. It’s astounding that technology has come this far. But what strikes me the most, is what the neurologist in the studio tells us about the procedure: they have no idea how it works. One might expect that stimulating an already overactive region wou ...
Neuronal mechanisms for the perception of ambiguous stimuli
... spatial luminance profile is formed by the multiplication of a sinusoidal waveform with a Gaussian envelope.) Orientation jitter breaks up any pattern, therefore favouring eye-rivalry rather than percept-rivalry. There is a gradual shift from eye-rivalry to percept-rivalry as pattern coherence is in ...
... spatial luminance profile is formed by the multiplication of a sinusoidal waveform with a Gaussian envelope.) Orientation jitter breaks up any pattern, therefore favouring eye-rivalry rather than percept-rivalry. There is a gradual shift from eye-rivalry to percept-rivalry as pattern coherence is in ...
The Art and Science of Research Grant Writing
... pituitary origin is secreted by lactotrophs (28). Lactotrophs have spontaneously high secretory activity, which is controlled primarily by tonic inhibitory input of hypothalamic origin (29), though they receive stimulatory input, as well (29-31). The physiological PRL inhibiting factor is dopamine ( ...
... pituitary origin is secreted by lactotrophs (28). Lactotrophs have spontaneously high secretory activity, which is controlled primarily by tonic inhibitory input of hypothalamic origin (29), though they receive stimulatory input, as well (29-31). The physiological PRL inhibiting factor is dopamine ( ...
Assisted morphogenesis: glial control of dendrite
... that these same glia-derived axon guidance cues can also act on dendrites [25]. For example, the extracellular matrix (ECM) protein Slit is expressed by specialized midline glia of the Drosophila central nervous system [26,27], and acts to repel axon growth cones that express the Slit receptor Robo ...
... that these same glia-derived axon guidance cues can also act on dendrites [25]. For example, the extracellular matrix (ECM) protein Slit is expressed by specialized midline glia of the Drosophila central nervous system [26,27], and acts to repel axon growth cones that express the Slit receptor Robo ...
Some Speculative Hypotheses about the Nature
... light hitting the eye or an arm, or a wall, is that inside the eye are light-sensitive receptors that transform the energy carried by the light into electrical signals. After some pre-processing these electrical signals are relayed along separate pathways to various specialized areas in the brain, w ...
... light hitting the eye or an arm, or a wall, is that inside the eye are light-sensitive receptors that transform the energy carried by the light into electrical signals. After some pre-processing these electrical signals are relayed along separate pathways to various specialized areas in the brain, w ...
LiuPoster - Department of Mathematics
... • How well the trajectory can follow the fixed point is determined by Ti and Te in equations 1 and 2). In my model, Ti is set larger than Te (Ti=5, Te=2), so the trajectory follows the fixed point better in the E direction •At high synchronies, the movement of the fixed point is very rapid, and the ...
... • How well the trajectory can follow the fixed point is determined by Ti and Te in equations 1 and 2). In my model, Ti is set larger than Te (Ti=5, Te=2), so the trajectory follows the fixed point better in the E direction •At high synchronies, the movement of the fixed point is very rapid, and the ...
and “Wanting” Linked to Reward Deficiency
... attributed greater incentive salience (wanting) to a sweet reward in the runway test. But sucrose taste failed to elicit higher orofacial hedonic liking reactions from mutant mice in an affective taste reactivity test. These results indicated that chronically elevated extracellular DA facilitated wa ...
... attributed greater incentive salience (wanting) to a sweet reward in the runway test. But sucrose taste failed to elicit higher orofacial hedonic liking reactions from mutant mice in an affective taste reactivity test. These results indicated that chronically elevated extracellular DA facilitated wa ...
PDF 2
... The available anatomical and physiological studies strongly suggest that parkinsonism results from dopamine loss in the basal ganglia, which induces neuronal discharge abnormalities within the entire motor circuit. At the cortical level, this manifests itself in abnormalities in cortical activation ...
... The available anatomical and physiological studies strongly suggest that parkinsonism results from dopamine loss in the basal ganglia, which induces neuronal discharge abnormalities within the entire motor circuit. At the cortical level, this manifests itself in abnormalities in cortical activation ...
Ectopic sensory neurons in mutant cockroaches
... cuticle of the hair shaft, the third cell differentiates into a neuron and the fourth cell differentiates into the accessory cell (Bate, 1978). The sensory neuron axon navigates into the CNS where it forms specific synaptic connections with first order interneurons (Bacon and Murphey, 1984) and moto ...
... cuticle of the hair shaft, the third cell differentiates into a neuron and the fourth cell differentiates into the accessory cell (Bate, 1978). The sensory neuron axon navigates into the CNS where it forms specific synaptic connections with first order interneurons (Bacon and Murphey, 1984) and moto ...