8Neurotrophins PCD
... development of a pathway or set of connections (and after this period, it cannot be repaired). e.g., There was a critical period for the formation of ocular dominance columns, based on neuronal activity/input from both spontaneous firing and visual inputs from the eyes. ...
... development of a pathway or set of connections (and after this period, it cannot be repaired). e.g., There was a critical period for the formation of ocular dominance columns, based on neuronal activity/input from both spontaneous firing and visual inputs from the eyes. ...
Engines of the brain
... simulated superficial cells that initially respond to a particular input pattern become increasingly responsive not only to that input but also to a range of similar inputs (those that share many active lines; i.e., small Hamming distances from each other), such that similar but distinguishable inpu ...
... simulated superficial cells that initially respond to a particular input pattern become increasingly responsive not only to that input but also to a range of similar inputs (those that share many active lines; i.e., small Hamming distances from each other), such that similar but distinguishable inpu ...
What is meant by the term `dementia`?
... The brain sends signals to the body and to other parts of the brain in the form of electrical impulses. These signals travel along the neurons by jumping the gaps between them (synapses) with the help of neurotransmitters (chemical messengers). These chemical and electrical signals are necessary in ...
... The brain sends signals to the body and to other parts of the brain in the form of electrical impulses. These signals travel along the neurons by jumping the gaps between them (synapses) with the help of neurotransmitters (chemical messengers). These chemical and electrical signals are necessary in ...
Physiologic Changes in Pregnancy
... – Increased total T4 and T3 • free levels unchanged • HCG suppresses TSH ...
... – Increased total T4 and T3 • free levels unchanged • HCG suppresses TSH ...
From view cells and place cells to cognitive map learning
... from the frontal or hippocampal de®cits in that there is no additional memory de®cit after PPC lesions. From the anatomical data, it is not possible to say that complex object recognition cannot be used for navigation, but the ablation of the Te2 region does not perturbate navigation tasks like thos ...
... from the frontal or hippocampal de®cits in that there is no additional memory de®cit after PPC lesions. From the anatomical data, it is not possible to say that complex object recognition cannot be used for navigation, but the ablation of the Te2 region does not perturbate navigation tasks like thos ...
Monday, June 20, 2005
... electrophysiological methods. As examples, I introduce some of our applications of imaging techniques on evaluation of dynamics of neural functions modulated by intracellular Cl- as below. In individual neurons in brain slices in which Cl--sensitive fluorescent dye MEQ was injected from patch electr ...
... electrophysiological methods. As examples, I introduce some of our applications of imaging techniques on evaluation of dynamics of neural functions modulated by intracellular Cl- as below. In individual neurons in brain slices in which Cl--sensitive fluorescent dye MEQ was injected from patch electr ...
Ascending tracts
... • Segregated bundles of nerve fibres in the white matter of the spinal cord descending from the supraspinal centres referred to as upper motor neurons ( UMN ) • are concerned with somatic and visceral motor activity • cells of origin lie in cerebral cortex and brain stem • regulate the LMN activity ...
... • Segregated bundles of nerve fibres in the white matter of the spinal cord descending from the supraspinal centres referred to as upper motor neurons ( UMN ) • are concerned with somatic and visceral motor activity • cells of origin lie in cerebral cortex and brain stem • regulate the LMN activity ...
Are Bigger Brains Better?
... While some increases in brain size will affect cognitive capacity, many increases in certain brain areas — especially those involved in sensory and motor processing — produce only quantitative improvements: more detail, finer resolution, higher sensitivity, greater precision — in other words, more o ...
... While some increases in brain size will affect cognitive capacity, many increases in certain brain areas — especially those involved in sensory and motor processing — produce only quantitative improvements: more detail, finer resolution, higher sensitivity, greater precision — in other words, more o ...
Sacrificing America On The Altar Of Mediocrity
... The targets (recognition molecules) can attract or repel axons. Usually, the growing axons do reach the correct target without any problem. However, at times, they do not, resulting in mental retardation, attention disorder, and other maladies. As the brain develops, this axonal growth continues, ev ...
... The targets (recognition molecules) can attract or repel axons. Usually, the growing axons do reach the correct target without any problem. However, at times, they do not, resulting in mental retardation, attention disorder, and other maladies. As the brain develops, this axonal growth continues, ev ...
Age-related Increase in Astrocytes in the Visual Area V2 of the Cat
... old (12–13 years old) cats. An immunohistochemical method was applied to demonstrate glial fibrillary acidic protein (GFAP)-immunoreactive astrocytes. Under the microscope, the densities of the astrocytes and the diameters of the somata were calculated, and the processes of the astrocytes were also ...
... old (12–13 years old) cats. An immunohistochemical method was applied to demonstrate glial fibrillary acidic protein (GFAP)-immunoreactive astrocytes. Under the microscope, the densities of the astrocytes and the diameters of the somata were calculated, and the processes of the astrocytes were also ...
The biology of time across different scales
... the period varies by less than 2% (ref. 19). However, it is not particularly flexible—it cannot be rapidly reset to a new phase (thus the phenomenon of jet lag). In contrast, our ability to time durations on the order of milli-seconds, or anticipate the change of a traffic light, is generally less p ...
... the period varies by less than 2% (ref. 19). However, it is not particularly flexible—it cannot be rapidly reset to a new phase (thus the phenomenon of jet lag). In contrast, our ability to time durations on the order of milli-seconds, or anticipate the change of a traffic light, is generally less p ...
ppt - Brain Dynamics Laboratory
... Functional consequences of oscillatory driving input to the motoneurons that relate to breathing have also been shown in rats in vitro. First, similar to the effect of correlated presynaptic inputs on other neurons, the timing of action potentials in motor neurons is crucially affected by oscillato ...
... Functional consequences of oscillatory driving input to the motoneurons that relate to breathing have also been shown in rats in vitro. First, similar to the effect of correlated presynaptic inputs on other neurons, the timing of action potentials in motor neurons is crucially affected by oscillato ...
IT`S ALL IN YOUR MIND - Teacher Enrichment Initiatives
... communicate. The frontal lobes think and create (#1). The parietal lobes (#4) help us with directions and to recognize objects and their uses. At the back of the head are the occipital lobes (#5) where messages from the eyes are received and interpreted. The temporal lobes (#6 ) control our hearing, ...
... communicate. The frontal lobes think and create (#1). The parietal lobes (#4) help us with directions and to recognize objects and their uses. At the back of the head are the occipital lobes (#5) where messages from the eyes are received and interpreted. The temporal lobes (#6 ) control our hearing, ...
Nerve Impulse Transmission
... carry it toward the cell body, which contains the nucleus. • The axon carries the impulse from the cell body toward the synaptic knobs where it will be transferred to other neurons. ...
... carry it toward the cell body, which contains the nucleus. • The axon carries the impulse from the cell body toward the synaptic knobs where it will be transferred to other neurons. ...
Growing Pains for fMRI
... selectively to images of faces—do indeed respond preferentially to faces (Science, 3 February 2006, p. 670). But Tootell says that more recent human fMRI experiments his group has done suggest that neurons in an adjacent “place” region in the temporal cortex respond preferentially to edges, not plac ...
... selectively to images of faces—do indeed respond preferentially to faces (Science, 3 February 2006, p. 670). But Tootell says that more recent human fMRI experiments his group has done suggest that neurons in an adjacent “place” region in the temporal cortex respond preferentially to edges, not plac ...
Significant Mirrorings in the Process of Teaching and Learning
... external aid and the resources gained by the child at a certain time of his learning process; it is defined as the distance between the current level of development and the level of potential development that can be achieved with the help of other more skilled people, adults or peers) that, from the ...
... external aid and the resources gained by the child at a certain time of his learning process; it is defined as the distance between the current level of development and the level of potential development that can be achieved with the help of other more skilled people, adults or peers) that, from the ...
Brain, Tobacco. Marijuana
... responses to visual stimuli, increased tremulousness, and a high-pitched cry, which may indicate neurological problems in development. During infancy and preschool years, marijuana-exposed children have been observed to have more behavioral problems than unexposed children and poorer performance on ...
... responses to visual stimuli, increased tremulousness, and a high-pitched cry, which may indicate neurological problems in development. During infancy and preschool years, marijuana-exposed children have been observed to have more behavioral problems than unexposed children and poorer performance on ...
Supporting Information S1.
... MEA recording system with an inter-node spacing of 200 m. Consequently, here we show that neurites can extend significantly from the soma over multiple nodes, up to 800 m (4 nodes). (Right) The same culture was counterstained with an antibody against βTubIII to show the whole network development. ...
... MEA recording system with an inter-node spacing of 200 m. Consequently, here we show that neurites can extend significantly from the soma over multiple nodes, up to 800 m (4 nodes). (Right) The same culture was counterstained with an antibody against βTubIII to show the whole network development. ...
AUTONOMIC REFLEX - Semmelweis University
... sympathetic trunk and form the splanchnic nerves, these fibers travel to a prevertebral gaglion 4. some preganglionic axons in the splanchnic nerve innervate chromaffin cells of the adrenal medulla ...
... sympathetic trunk and form the splanchnic nerves, these fibers travel to a prevertebral gaglion 4. some preganglionic axons in the splanchnic nerve innervate chromaffin cells of the adrenal medulla ...
Researchers study tourism-poverty nexus in Central America
... said the study shows the notion "more tourism is hotels and vacation homes. better," does not apply in biodiverse environments. A study conducted by researchers at Penn State and partnering institutions, however, challenges the notion that this mass tourism model is better for resident well-being in ...
... said the study shows the notion "more tourism is hotels and vacation homes. better," does not apply in biodiverse environments. A study conducted by researchers at Penn State and partnering institutions, however, challenges the notion that this mass tourism model is better for resident well-being in ...
14-1 SENSATION FIGURE 14.1 1. The general senses provide
... axons of the primary neurons form the dorsal columns, also called the posterior columns or posterior funiculi. B. The secondary neuron is in a nucleus in the medulla oblongata. The primary neuron synapses with the secondary neuron, which crosses over in the medulla and ascends to the thalamus. The a ...
... axons of the primary neurons form the dorsal columns, also called the posterior columns or posterior funiculi. B. The secondary neuron is in a nucleus in the medulla oblongata. The primary neuron synapses with the secondary neuron, which crosses over in the medulla and ascends to the thalamus. The a ...
14-1 SENSATION 1. The general senses provide information about
... axons of the primary neurons form the dorsal columns, also called the posterior columns or posterior funiculi. B. The secondary neuron is in a nucleus in the medulla oblongata. The primary neuron synapses with the secondary neuron, which crosses over in the medulla and ascends to the thalamus. The a ...
... axons of the primary neurons form the dorsal columns, also called the posterior columns or posterior funiculi. B. The secondary neuron is in a nucleus in the medulla oblongata. The primary neuron synapses with the secondary neuron, which crosses over in the medulla and ascends to the thalamus. The a ...
Unimodal or Bimodal Distribution of Synaptic Weights?
... changes in synaptic weights, so that the neuron may specialise to ‘noise’ rather than to features of the outside world. Moreover, such a bimodal distribution seems to be difficult to reconcile with experiments in young rats where a unimodal distribution was found [1]. Other plasticity models, howeve ...
... changes in synaptic weights, so that the neuron may specialise to ‘noise’ rather than to features of the outside world. Moreover, such a bimodal distribution seems to be difficult to reconcile with experiments in young rats where a unimodal distribution was found [1]. Other plasticity models, howeve ...
BOLD signal - Department of Psychology
... Partial volume effects: The combination, within a single voxel, of signal contributions from two or more distinct tissue types or functional regions (Huettel, Song & McCarthy, 2004) This voxel contains mostly gray matter This voxel contains mostly white matter ...
... Partial volume effects: The combination, within a single voxel, of signal contributions from two or more distinct tissue types or functional regions (Huettel, Song & McCarthy, 2004) This voxel contains mostly gray matter This voxel contains mostly white matter ...