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Chapter 8 The Nervous System
Chapter 8 The Nervous System

The effect of spinal cord injury on the neurochemical properties of
The effect of spinal cord injury on the neurochemical properties of

... projections that supply most visceral organs, including the bladder. Due to its non-spinal ...
Columnar Organization of Dendrites and Axons of Single and
Columnar Organization of Dendrites and Axons of Single and

... Germany) fitted with 2.5⫻ plan /0.075 NA and 40⫻-W/0.80 objectives) with the pial surface pointing to the front and the hippocampus to the right. The barrel field was visualized at low magnification under bright-field illumination and can be identified in layer 4 as evenly spaced dark structures. Ba ...
Decision Making in Recurrent Neuronal Circuits
Decision Making in Recurrent Neuronal Circuits

... What are the properties of a local cortical area (e.g., in the prefrontal or posterior parietal cortex) that enable it to subserve decision computations, in contrast to early processing in primary sensory areas? How can one establish the chain of causation linking molecules, circuits to decision beh ...
Contextual modulation and stimulus selectivity in extrastriate cortex
Contextual modulation and stimulus selectivity in extrastriate cortex

... mechanisms in the early visual system. These circuits are thought to generate feature selectivity in part by repeatedly filtering and pooling feedforward inputs. For example, a V1 neuron could develop orientation tuning by selectively pooling the outputs of several circular LGN receptive fields (Hubel ...
17. Pathways and Integrative Functions
17. Pathways and Integrative Functions

... topos = place). For example, recall the homunculus map in chapter 15 (see figure 15.12), which depicted the surface of the precentral gyrus and showed the parts of the primary motor cortex that control specific body regions. The pathways that connect these parts of the primary motor cortex to a spec ...
Simulating Populations of Neurons - Leeds VLE
Simulating Populations of Neurons - Leeds VLE

... Figure 2 Brodmann areas of the brain (Gazzaniga, 1998) ...................................................................... 9 Figure 3 Types of biological neurons in the nervous system (Gazzaniga, 1998) .................................. 10 Figure 4 Anatomy and Functional areas of the brain (http: ...
Production and Survival of Projection Neurons in a Forebrain Vocal
Production and Survival of Projection Neurons in a Forebrain Vocal

... completely scanned for 3H-labeled neurons. The number of such cells that were also retrogradely labeled with beads was divided by the volume sampled to generate double-labeled cell densities. )H-bead cell density data were used for comparing the efficacy of beads and fluorogold. Ventricular zone ana ...
Orcokinin peptides in developing and adult crustacean
Orcokinin peptides in developing and adult crustacean

... characterization of the peptides in different tissues and species allows us to determine unambiguously which of the peptides are found in the stomatogastric nervous system of each crustacean studied. Despite the extensive biochemical characterization of the orcokinins, relatively little is known of ...
Cortico–basal ganglia circuit mechanism for a decision threshold in
Cortico–basal ganglia circuit mechanism for a decision threshold in

... when the SNr receives increased inhibitory inputs from caudate nucleus (CD, part of the striatum), which is driven by excitatory inputs from many cortical areas including the LIP and frontal eye field25,29. Thus, the cortico–basal ganglia pathway has a modulatory role in the generation of saccadic e ...
Impaired Cl Extrusion in Layer V Pyramidal Neurons of Chronically
Impaired Cl Extrusion in Layer V Pyramidal Neurons of Chronically

Title - HAL
Title - HAL

... Neuronal dendrites display an astonishing diversity in shape. This part of the nerve cells is important for several reasons. Firstly, it strongly influences the information processing performed by the cell, though how this influence is exercised is still debated. Secondly, the shape of dendritic arb ...
From/To LTM - Ohio University
From/To LTM - Ohio University

... The layered uniform structure of identical processing units, postulated by Mountcastle as a minicolumn organization [1][3], supports the biological intelligence building in human neocortex.  Neurons on different layers of minicolumns are proposed to have specific function in the interaction between ...
judasMRT99
judasMRT99

... cells in the layer I. In the visual cortex of the adult rhesus monkey, Sandell (1986) described few NADPH-d cells that send most of their processes down in layers II and III instead of branching within the layer I. According to Fischer and Kuljis (1994), layer I of the adult human cortex does not co ...
Short title: Thalamocortical computations during tactile sensation
Short title: Thalamocortical computations during tactile sensation

... Diego A. Gutnisky1, Jianing Yu1, S. Andrew Hires1,2, Minh-Son To3, Michael Bale4,5, Karel ...
Neuronal Calcium Signaling Review
Neuronal Calcium Signaling Review

... 1996). Calcium release in cardiac cells is mediated by the type 2 RYR, which is the predominant isoform found in the brain. In cardiac cells, these RYR2 channels are closely apposed to the Ca21 channels in the plasma membrane across the 15 nm junctional gap that separates the sarcolemma from the sar ...
Neuronal calcium-binding proteins 1/2 localize to dorsal root ganglia
Neuronal calcium-binding proteins 1/2 localize to dorsal root ganglia

... Thus, the NECAB1+ cell bodies and processes, “embraced” the dorsal column, forming a horseshoe structure (34) with a palisade-like pattern. The bundles of NECAB1+ structures extended from the dorsal commissural region along the medial surface of the dorsal horn, separated by gaps in the longitudinal ...
Selective Loss of Catecholaminergic Wake–Active Neurons in a
Selective Loss of Catecholaminergic Wake–Active Neurons in a

... Image-Pro Plus software (Media Cybernetics, Silver Spring, MD) to measure fluorescence intensity relative to background (adjacent non-TH region). For each group of wake-active neurons, the total number of nucleated wake neurons on all relevant sections were counted, and the percentage of these neuro ...
View PDF - MRC BNDU - University of Oxford
View PDF - MRC BNDU - University of Oxford

... Neurons in the pedunculopontine nucleus (PPN) are highly heterogeneous in their discharge properties, their neurochemical markers, their pattern of connectivity and the behavioural processes in which they participate. Three main transmitter phenotypes have been described, cholinergic, GABAergic and ...
A Self-Organizing Neural Network for Contour Integration through Synchronized Firing
A Self-Organizing Neural Network for Contour Integration through Synchronized Firing

... Pettet, McKee, & Grzywacz, 1998; Geisler & Super, 2000) and computational models (Yen & Finkel, 1997; Li, 1998; Yen & Finkel, 1998; Geisler & Super, 2000) suggest that contour integration in the visual cortex may be due to interaction of neurons with similar orientation tuning. The models perform in ...
Target-specific differences in somatodendritic morphology of layer V
Target-specific differences in somatodendritic morphology of layer V

... cortex. Marked differences in the distribution of soma, somal size, and dendritic profiles were found among the three groups of pyramidal neurons. Corticospinal neurons were large, were located in deep layer V, and had the most expansive dendritic fields. The apical dendrites of corticospinal pyramida ...
Chronic multiunit recordings in behaving animals: advantages and
Chronic multiunit recordings in behaving animals: advantages and

Morphology and Physiology of the Cerebellar Vestibulolateral Lobe
Morphology and Physiology of the Cerebellar Vestibulolateral Lobe

... including axonal projections to the octaval nuclei (Highstein et al. 1992; McCormick and Braford 1994). The major objective of this study was to identify the brain stem sources providing afferent input to cerebellar vestibulolateral lobe granule cells, in particular neuronal subgroups related to ves ...
Functional Properties of Corticotectal Neurons in the Monkey`s
Functional Properties of Corticotectal Neurons in the Monkey`s

Pontine respiratory activity involved in inspiratory/expiratory phase
Pontine respiratory activity involved in inspiratory/expiratory phase

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Mirror neuron

A mirror neuron is a neuron that fires both when an animal acts and when the animal observes the same action performed by another. Thus, the neuron ""mirrors"" the behavior of the other, as though the observer were itself acting. Such neurons have been directly observed in primate species. Birds have been shown to have imitative resonance behaviors and neurological evidence suggests the presence of some form of mirroring system. In humans, brain activity consistent with that of mirror neurons has been found in the premotor cortex, the supplementary motor area, the primary somatosensory cortex and the inferior parietal cortex.The function of the mirror system is a subject of much speculation. Many researchers in cognitive neuroscience and cognitive psychology consider that this system provides the physiological mechanism for the perception/action coupling (see the common coding theory). They argue that mirror neurons may be important for understanding the actions of other people, and for learning new skills by imitation. Some researchers also speculate that mirror systems may simulate observed actions, and thus contribute to theory of mind skills, while others relate mirror neurons to language abilities. Neuroscientists such as Marco Iacoboni (UCLA) have argued that mirror neuron systems in the human brain help us understand the actions and intentions of other people. In a study published in March 2005 Iacoboni and his colleagues reported that mirror neurons could discern if another person who was picking up a cup of tea planned to drink from it or clear it from the table. In addition, Iacoboni has argued that mirror neurons are the neural basis of the human capacity for emotions such as empathy.It has also been proposed that problems with the mirror neuron system may underlie cognitive disorders, particularly autism. However the connection between mirror neuron dysfunction and autism is tentative and it remains to be seen how mirror neurons may be related to many of the important characteristics of autism.Despite the excitement generated by these findings, to date, no widely accepted neural or computational models have been put forward to describe how mirror neuron activity supports cognitive functions such as imitation. There are neuroscientists who caution that the claims being made for the role of mirror neurons are not supported by adequate research.
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