Vestibular System
... between the near and far ear. (Also, the pinna may modify sound coming from different directions, and the animal can move its ears and head to assist in sound localization.) ...
... between the near and far ear. (Also, the pinna may modify sound coming from different directions, and the animal can move its ears and head to assist in sound localization.) ...
PDF
... level, information is encoded in the spiking of neurons and there is much debate about the level of precision that is important [1,2]. At the cellular level important processes have been hypothesized to be dependent on the timing of input and output such as spike-timing dependent plasticity ‘‘STDP’’ ...
... level, information is encoded in the spiking of neurons and there is much debate about the level of precision that is important [1,2]. At the cellular level important processes have been hypothesized to be dependent on the timing of input and output such as spike-timing dependent plasticity ‘‘STDP’’ ...
The Constructive Nature of Visual Processing
... geniculate nucleus of the thalamus. The lateral geniculate nucleus in primates consists of six layers, each of which receives input from either the ipsilateral or the contralateral eye. Because each layer contains a map of the contralateral hemifield, six concordant maps are stacked atop one another ...
... geniculate nucleus of the thalamus. The lateral geniculate nucleus in primates consists of six layers, each of which receives input from either the ipsilateral or the contralateral eye. Because each layer contains a map of the contralateral hemifield, six concordant maps are stacked atop one another ...
Projections From the Ventral Cochlear Nucleus to the Dorsal
... cells exhibit characteristically smooth, round-to-oval somata of 6–8 µm in diameter, and give rise to two to four primary dendrites of varying lengths and branching frequency. Each dendritic branch ends in a distinctive claw-like structure, but the claw can vary in form from a relatively simple thre ...
... cells exhibit characteristically smooth, round-to-oval somata of 6–8 µm in diameter, and give rise to two to four primary dendrites of varying lengths and branching frequency. Each dendritic branch ends in a distinctive claw-like structure, but the claw can vary in form from a relatively simple thre ...
The organization of the cortical motor system: new concepts
... al., 1996). That is, regardless of where the gaze is directed, the visual RF remains in the same location with respect to the body. The main target of area VIP in the frontal lobe is area F4 (Fig. 2B; Matelli et al., 1994). Microstimulation experiments have shown that in F4, arm, neck, face and mout ...
... al., 1996). That is, regardless of where the gaze is directed, the visual RF remains in the same location with respect to the body. The main target of area VIP in the frontal lobe is area F4 (Fig. 2B; Matelli et al., 1994). Microstimulation experiments have shown that in F4, arm, neck, face and mout ...
Word Definition 12 Cranial Nerve innervation of
... The very large layer 5 pyramidal cells of the motor cortex (Brodmann’s area 4). The Betz cell axons project to the spinal cord. (Vladimir Betz described them in a paper published in 1874.) Transection, by a surgical knife cut, of the pyramidal tract on both sides of the hindbrain. Neurons that can b ...
... The very large layer 5 pyramidal cells of the motor cortex (Brodmann’s area 4). The Betz cell axons project to the spinal cord. (Vladimir Betz described them in a paper published in 1874.) Transection, by a surgical knife cut, of the pyramidal tract on both sides of the hindbrain. Neurons that can b ...
Crocodilian Forebrain: Evolution and Development
... nucleus in mammals. First, the thalamic reticular nucleus projects to all dorsal thalamic nuclei. Second, its neurons are located within the internal capsule, the fiber bundle interconnecting the dorsal thalamus and cerebral cortex. Third, the thalamic reticular nucleus is composed of a homogeneous ...
... nucleus in mammals. First, the thalamic reticular nucleus projects to all dorsal thalamic nuclei. Second, its neurons are located within the internal capsule, the fiber bundle interconnecting the dorsal thalamus and cerebral cortex. Third, the thalamic reticular nucleus is composed of a homogeneous ...
Lineage origins of GABAergic versus glutamatergic neurons in the
... hindbrain and spinal cord. By contrast, layer IV spiny stellate neurons receive most of the inputs from the thalamus and project locally within the neocortex, while layer II and III projection neurons form connections within the cortical hemispheres and between them (Figure 1). It is worth noting, h ...
... hindbrain and spinal cord. By contrast, layer IV spiny stellate neurons receive most of the inputs from the thalamus and project locally within the neocortex, while layer II and III projection neurons form connections within the cortical hemispheres and between them (Figure 1). It is worth noting, h ...
A Double-labeling Investigation of the Afferent Connectivity to
... the region of overlap of the two populations of single-labeled neurons. We concluded from this observation that the two branches of a bifurcating axon terminate in cortical regions representing the same portion of the visual field. Since then, several experimental results have led us to revise this ...
... the region of overlap of the two populations of single-labeled neurons. We concluded from this observation that the two branches of a bifurcating axon terminate in cortical regions representing the same portion of the visual field. Since then, several experimental results have led us to revise this ...
the superior Olivary complex
... because anatomically it is in a superior position relative to the inferior olivary complex. The term olivary is based on the olive-shaped protuberance on the ventral lateral surface of the medulla created by the underlying inferior olivary complex. The SOC extends from the rostral medulla to the cau ...
... because anatomically it is in a superior position relative to the inferior olivary complex. The term olivary is based on the olive-shaped protuberance on the ventral lateral surface of the medulla created by the underlying inferior olivary complex. The SOC extends from the rostral medulla to the cau ...
- D-Scholarship@Pitt
... transported tracers into the SC in order to label neurons in cortex.14–18 Studies based on injections in the SC allow the magnitudes and visuotopic pattern of projections of different cortical areas to be directly compared, as corticotectal neurons in a number of areas are labeled by each injection ...
... transported tracers into the SC in order to label neurons in cortex.14–18 Studies based on injections in the SC allow the magnitudes and visuotopic pattern of projections of different cortical areas to be directly compared, as corticotectal neurons in a number of areas are labeled by each injection ...
Neuronal DNA Content Variation (DCV) With Regional
... Neural aneuploidy occurs to a similar extent in both neurons and glia (Rehen et al., 2005), is found phylogenetically from fish through humans (Rehen et al., 2001, 2005; Yurov et al., 2005; Kingsbury et al., 2006; Rajendran et al., 2007; Peterson et al., 2008), and is present throughout the neuraxis ...
... Neural aneuploidy occurs to a similar extent in both neurons and glia (Rehen et al., 2005), is found phylogenetically from fish through humans (Rehen et al., 2001, 2005; Yurov et al., 2005; Kingsbury et al., 2006; Rajendran et al., 2007; Peterson et al., 2008), and is present throughout the neuraxis ...
Synaptic Specificity in Frog Sympathetic Ganglia During
... preganglionic roots was checked by means of a collision test. Only the nicotinic fast excitatory postsynaptic potentials (Kuba and Koketsu, 1978) were examined in this study. Ganglionic neurons were classified from the latency of antidromic action potential invasion in the cell body, which proved to ...
... preganglionic roots was checked by means of a collision test. Only the nicotinic fast excitatory postsynaptic potentials (Kuba and Koketsu, 1978) were examined in this study. Ganglionic neurons were classified from the latency of antidromic action potential invasion in the cell body, which proved to ...
CNS – composed of the brain and spinal cord Cephalization
... superolateral walls of the third ventricle ...
... superolateral walls of the third ventricle ...
a needle into the sub- and the dorsal funiculi. Preganglionic
... ing dorsal root axons, together with descending fibers, many of which come from the reticular formation of the medulla, The unmvelinated axons of the gelatinosa cells ascend or descend for up to four segments of the cord in the doradjacent white matter Their many branches n the other laminae of the ...
... ing dorsal root axons, together with descending fibers, many of which come from the reticular formation of the medulla, The unmvelinated axons of the gelatinosa cells ascend or descend for up to four segments of the cord in the doradjacent white matter Their many branches n the other laminae of the ...
Horizontal Interactions in Cat Striate Cortex: 1. Anatomical Substrate
... except layer I and they are organized in register. The distances spanned are largest in supragranular, intermediate in infragranular and shortest in granular layers. In BD and DR cats older than 10 weeks, the length of intracortical tangential fibres becomes reduced to the same extent as in NR anima ...
... except layer I and they are organized in register. The distances spanned are largest in supragranular, intermediate in infragranular and shortest in granular layers. In BD and DR cats older than 10 weeks, the length of intracortical tangential fibres becomes reduced to the same extent as in NR anima ...
Oriented Axon Projections in Primary Visual Cortex of the Monkey
... At each site, the orientation preference and the range of orientations that elicited responses were judged by sound and recorded separately for each eye. We also mapped by hand the minimum response fields (Hubel and Wiesel, 1962). The borders and preferred orientation of the receptive field were det ...
... At each site, the orientation preference and the range of orientations that elicited responses were judged by sound and recorded separately for each eye. We also mapped by hand the minimum response fields (Hubel and Wiesel, 1962). The borders and preferred orientation of the receptive field were det ...
Sample Chapter 8 from the Textbook
... specialized sheaths, called myelin sheaths, wrapped around them (figure 8.6). Each oligodendrocyte process or Schwann cell repeatedly wraps around a segment of an axon to form a series of tightly wrapped cell membranes. A typical small nerve, which consists of axons of multiple neurons, usually cont ...
... specialized sheaths, called myelin sheaths, wrapped around them (figure 8.6). Each oligodendrocyte process or Schwann cell repeatedly wraps around a segment of an axon to form a series of tightly wrapped cell membranes. A typical small nerve, which consists of axons of multiple neurons, usually cont ...
CORTICAL AFFERENT INPUT TO THE PRINCIPALS REGION OF THE RHESUS MONKEY H.
... temporal cortex (areas 20, 21 or TE) have been implicated in visual function on the basis of behavioral, anatomic and electrophysiologic experiments (for reviews see Refs 88, 89, 95 and 98). In the present experiment labeled neurons were found in areas OA and TE. Labeled neurons within peristriate a ...
... temporal cortex (areas 20, 21 or TE) have been implicated in visual function on the basis of behavioral, anatomic and electrophysiologic experiments (for reviews see Refs 88, 89, 95 and 98). In the present experiment labeled neurons were found in areas OA and TE. Labeled neurons within peristriate a ...
Finally, the peak firing rate within any one place field of a single cell
... patterns they can store and retrieve reliably, has been determined (Treves & Rolls, 1992), and was found to depend substantially on the properties of the set of input patterns that we attempt to store. Capacity is roughly inversely proportional to the sparsity of individual patterns (i.e., the propo ...
... patterns they can store and retrieve reliably, has been determined (Treves & Rolls, 1992), and was found to depend substantially on the properties of the set of input patterns that we attempt to store. Capacity is roughly inversely proportional to the sparsity of individual patterns (i.e., the propo ...
Number and Laminar Distribution of Neurons in a
... previously estimated by extrapolations based on measurements of neuron density (sampled using Sterio’s disector method; Sterio 1984). However, the estimates for neuron density in rat somatosensory cortex varied by almost a factor of 2: between 48 000 per cubic millimeter (Beaulieu 1993) and 77 000 p ...
... previously estimated by extrapolations based on measurements of neuron density (sampled using Sterio’s disector method; Sterio 1984). However, the estimates for neuron density in rat somatosensory cortex varied by almost a factor of 2: between 48 000 per cubic millimeter (Beaulieu 1993) and 77 000 p ...
Branched thalamic afferents - the Sherman Lab
... The role of branched axons in defining what exactly is happening in the brain during a sensory experience forms the subject of this essay. It is an important problem because essentially all of the axons that carry messages to the thalamus for relay to the cortex come from branched axons comparable t ...
... The role of branched axons in defining what exactly is happening in the brain during a sensory experience forms the subject of this essay. It is an important problem because essentially all of the axons that carry messages to the thalamus for relay to the cortex come from branched axons comparable t ...
Presentation - Neuropathology
... bradykinesia, rigidity, postural instability, and a postural/action tremor rather than the classic pill-rolling tremor seen in Parkinson's disease. These symptoms are usually poorly responsive to long-term levodopa therapy. In MSA-C, typical findings are gait and limb ataxia, cerebellar dysarthria, ...
... bradykinesia, rigidity, postural instability, and a postural/action tremor rather than the classic pill-rolling tremor seen in Parkinson's disease. These symptoms are usually poorly responsive to long-term levodopa therapy. In MSA-C, typical findings are gait and limb ataxia, cerebellar dysarthria, ...
Canonical Microcircuits for Predictive Coding
... in another (see Thomson and Bannister, 2003 for a review). While many studies have focused on excitatory connections, a few have examined inhibitory connections. These are more difficult to study, because inhibitory cells are less common than excitatory cells, and because there are at least seven di ...
... in another (see Thomson and Bannister, 2003 for a review). While many studies have focused on excitatory connections, a few have examined inhibitory connections. These are more difficult to study, because inhibitory cells are less common than excitatory cells, and because there are at least seven di ...
Specific synapses develop preferentially among sister excitatory
... the progeny of different progenitor cells. Furthermore, the morphology and biophysical properties of these control neurons confirmed that they were excitatory neurons (Fig. 3d–g). Hence they served as adjacent nonsibling controls. Once all four recordings were established, action potentials were seq ...
... the progeny of different progenitor cells. Furthermore, the morphology and biophysical properties of these control neurons confirmed that they were excitatory neurons (Fig. 3d–g). Hence they served as adjacent nonsibling controls. Once all four recordings were established, action potentials were seq ...
Anatomy of the cerebellum
The anatomy of the cerebellum can be viewed at three levels. At the level of large-scale anatomy, the cerebellum consists of a tightly folded and crumpled layer of cortex, with white matter underneath, several deep nuclei embedded in the white matter, and a fluid-filled ventricle in the middle. At the intermediate level, the cerebellum and its auxiliary structures can be decomposed into several hundred or thousand independently functioning modules or ""microzones"". At the microscopic level, each module consists of the same small set of neuronal elements, laid out with a highly stereotyped geometry.