Life: The Science of Biology, 8e
... The telencephalon consists of two cerebral hemispheres and is also called the cerebrum. An evolutionary trend in which the telencephalon increases in size and complexity in vertebrates is telencephalization. ...
... The telencephalon consists of two cerebral hemispheres and is also called the cerebrum. An evolutionary trend in which the telencephalon increases in size and complexity in vertebrates is telencephalization. ...
Time-delay-induced phase-transition to synchrony in coupled
... to have significant effects in the ensemble activity of neurons. Thus, in modeling studies of neurons and networks, the influence of time delays on the ensemble activity has received a great deal of attention recently.4–16 In networks of coupled neurons, time delays have been shown to affect not onl ...
... to have significant effects in the ensemble activity of neurons. Thus, in modeling studies of neurons and networks, the influence of time delays on the ensemble activity has received a great deal of attention recently.4–16 In networks of coupled neurons, time delays have been shown to affect not onl ...
Astrocyte-Neuron Interactions during Learning May Occur by Lactate
... in humans are hypothesized to have evolved from faculties originally developed for other purposes (Pinker, 2010). The same mechanisms were likely involved in the evolutive selection (or exploitation) of glutamate as the principal excitatory neurotransmitter of mammalian brain (reviewed by Mangia et ...
... in humans are hypothesized to have evolved from faculties originally developed for other purposes (Pinker, 2010). The same mechanisms were likely involved in the evolutive selection (or exploitation) of glutamate as the principal excitatory neurotransmitter of mammalian brain (reviewed by Mangia et ...
HYPOTHALAMUS
... Plate 29 shows the relationship of troph-hormone producing cells to fenestrated capillaries in the anterior pituitary. The magno- and parvocellular cell groups producing the hypothalamic hormones receive a variety of stimuli from different parts of the brain, primarily within the hypothalamus, but ...
... Plate 29 shows the relationship of troph-hormone producing cells to fenestrated capillaries in the anterior pituitary. The magno- and parvocellular cell groups producing the hypothalamic hormones receive a variety of stimuli from different parts of the brain, primarily within the hypothalamus, but ...
Zebrafish and motor control over the last decade
... motor output at higher swimming speeds (Kimura et al., 2006). We might predict that Chx-10 positive excitatory neurons in mammals play similar roles in driving motor output and that they would be a good place to search for excitatory elements in the mammalian central pattern generator. The ability t ...
... motor output at higher swimming speeds (Kimura et al., 2006). We might predict that Chx-10 positive excitatory neurons in mammals play similar roles in driving motor output and that they would be a good place to search for excitatory elements in the mammalian central pattern generator. The ability t ...
empathize with fictional characters
... typically associated with language disorders, and brain imaging studies using language activation tasks invariably activate this brain region. There is also a functional argument linking mirror neurons to language. Indeed, well before mirror neurons were discovered, some linguists proposed that for ...
... typically associated with language disorders, and brain imaging studies using language activation tasks invariably activate this brain region. There is also a functional argument linking mirror neurons to language. Indeed, well before mirror neurons were discovered, some linguists proposed that for ...
Zoology 242 Anatomy of Nervous systems Lecture 8
... • Has a synapse between neurons that is peripherally located (i.e. outside the CNS). • Synapses occur in autonomic ganglia. • The sympathetic ganglia segmentally arranged are called paravertebral ganglia (next to the vertebrae), also called sympathetic chain ganglia. • Parasympathetic ganglia are lo ...
... • Has a synapse between neurons that is peripherally located (i.e. outside the CNS). • Synapses occur in autonomic ganglia. • The sympathetic ganglia segmentally arranged are called paravertebral ganglia (next to the vertebrae), also called sympathetic chain ganglia. • Parasympathetic ganglia are lo ...
Intracellular study of rat substantia nigra pars reticulata neurons in
... The electrical membrane properties of 5tl135tattlsa n.~,~ap~!rSreiiculata (SNR) neurons and the,r postsynapuc responses to si~.mulation of the subthalamic nucleus (STH) were studied in an m vitro slice preparation. SNR neurons were divided into two types based on their electrical membrane properties ...
... The electrical membrane properties of 5tl135tattlsa n.~,~ap~!rSreiiculata (SNR) neurons and the,r postsynapuc responses to si~.mulation of the subthalamic nucleus (STH) were studied in an m vitro slice preparation. SNR neurons were divided into two types based on their electrical membrane properties ...
A comparison of the distribution and morphology of ChAT
... ABSTRACT: Present knowledge concerning the organization of cholinergic structures of the spinal cord has been derived primarily from studies on small laboratory animals, while there is a complete lack of information concerning its structure in the pig. In the present study we employed choline acetyl ...
... ABSTRACT: Present knowledge concerning the organization of cholinergic structures of the spinal cord has been derived primarily from studies on small laboratory animals, while there is a complete lack of information concerning its structure in the pig. In the present study we employed choline acetyl ...
Modulation of Cortical Activation and Behavioral Arousal by
... FIGURE 1. Cholinergic, orexinergic, and other neurons involved in sleep–wake state control. Sagittal schematic view of the rat brain depicting neurons with their chemical neurotransmitters and pathways by which they influence cortical activity or behavior across the sleep–wake cycle. Wake (W) is cha ...
... FIGURE 1. Cholinergic, orexinergic, and other neurons involved in sleep–wake state control. Sagittal schematic view of the rat brain depicting neurons with their chemical neurotransmitters and pathways by which they influence cortical activity or behavior across the sleep–wake cycle. Wake (W) is cha ...
Unique features of the human brainstem and cerebellum
... 2001; Hoover and Strick, 1999; Dum and Strick, 2003; Kelly and Strick, 2003; Akkal et al., 2007). In addition to its contribution to cortical function, the cerebellum also can influence motor control by projections to brainstem structures like the vestibular nuclei that in turn affect movement (Lang ...
... 2001; Hoover and Strick, 1999; Dum and Strick, 2003; Kelly and Strick, 2003; Akkal et al., 2007). In addition to its contribution to cortical function, the cerebellum also can influence motor control by projections to brainstem structures like the vestibular nuclei that in turn affect movement (Lang ...
Histamine neurons in the tuberomamillary nucleus: a whole center
... However, perfusion of the posterior hypothalamus with mAEA did not change significantly histamine release from the perirhinal cortex (Passani et al., 2007; Table 1) despite the profuse histaminergic innervation of this region (Panula et al., 1989) and the presence of histaminergic receptors (Pillot ...
... However, perfusion of the posterior hypothalamus with mAEA did not change significantly histamine release from the perirhinal cortex (Passani et al., 2007; Table 1) despite the profuse histaminergic innervation of this region (Panula et al., 1989) and the presence of histaminergic receptors (Pillot ...
The fate of Nissl-stained dark neurons following
... TUNEL staining APOPTOSIS in situ Detection Kit (WAKO, Osaka, Japan) was used for TUNEL staining, according to the manufacturer’s instruction. After deparaVinization and hydration, sections were incubated with protein digestion enzyme solution for 5 min at 37°C, The sections were treated with TdT sol ...
... TUNEL staining APOPTOSIS in situ Detection Kit (WAKO, Osaka, Japan) was used for TUNEL staining, according to the manufacturer’s instruction. After deparaVinization and hydration, sections were incubated with protein digestion enzyme solution for 5 min at 37°C, The sections were treated with TdT sol ...
Neurobiology of injury to the developing brain.
... Abstract We tested the hypothesis that vascular remodeling in the cortex, hippocampus, and thalamus is associated with long-term functional recovery after traumatic brain injury (TBI). We ...
... Abstract We tested the hypothesis that vascular remodeling in the cortex, hippocampus, and thalamus is associated with long-term functional recovery after traumatic brain injury (TBI). We ...
Full version (PDF file)
... and primates. The density of CR+ neurons decreases with increasing depth in neocortex and therefore they are quite rare in infragranular layers, when compared to the supragranular ones. The CR+ neurons most commonly possess bipolar or bitufted (two tufts of dendrites originating from the opposite ce ...
... and primates. The density of CR+ neurons decreases with increasing depth in neocortex and therefore they are quite rare in infragranular layers, when compared to the supragranular ones. The CR+ neurons most commonly possess bipolar or bitufted (two tufts of dendrites originating from the opposite ce ...
Central nervous System Lesions Leading to Disability
... afferent fibers bifurcate and travel in rostral and caudal directions, sending off terminals at various segmental levels. The motor neurons lie in the ventral horn. Those innervating a single muscle are collectively called a motor neuron pool. The motor neuron pools are segregated into longitudinal ...
... afferent fibers bifurcate and travel in rostral and caudal directions, sending off terminals at various segmental levels. The motor neurons lie in the ventral horn. Those innervating a single muscle are collectively called a motor neuron pool. The motor neuron pools are segregated into longitudinal ...
Radiologic-Pathologic Correlation Polymicrogyria
... ular layer under the pia. Although this feature disappears by 27 to 30 weeks of gestation, areas of retained superficial granular layers can normally be found in the cortex of the temporal lobes and basal cortex of the frontal lobes throughout life. All cortical layers undergo special organization, ...
... ular layer under the pia. Although this feature disappears by 27 to 30 weeks of gestation, areas of retained superficial granular layers can normally be found in the cortex of the temporal lobes and basal cortex of the frontal lobes throughout life. All cortical layers undergo special organization, ...
How the prefrontal executive got its stripes
... and relationship to connections Systematic structural variation refers to the gradual changes seen in laminar structure in all cortical systems, whether they are sensory, motor/premotor or prefrontal. Each cortical system, regardless of its placement on the cortical mantle, is composed of areas that ...
... and relationship to connections Systematic structural variation refers to the gradual changes seen in laminar structure in all cortical systems, whether they are sensory, motor/premotor or prefrontal. Each cortical system, regardless of its placement on the cortical mantle, is composed of areas that ...
A quantitative description of the mouse piriform cortex
... olfaction: the number of glomeruli, the number of neurons, and the strength of synaptic connection between any glomerulus ‘i’ and neuron ‘j’, i.e. the entry (i,j) in the connection matrix. The number of glomeruli is already known, and the number of neurons is available from this report. To complete ...
... olfaction: the number of glomeruli, the number of neurons, and the strength of synaptic connection between any glomerulus ‘i’ and neuron ‘j’, i.e. the entry (i,j) in the connection matrix. The number of glomeruli is already known, and the number of neurons is available from this report. To complete ...
Physiological Psychology - II Sem
... communication. (In fact, the types of neurons called amacrine cells have no axons, and communicate only via their dendrites.) Neural signals propagate along an axon in the form of electrochemical waves called action potentials, which produce cell-to-cell signals at points where axon terminals make s ...
... communication. (In fact, the types of neurons called amacrine cells have no axons, and communicate only via their dendrites.) Neural signals propagate along an axon in the form of electrochemical waves called action potentials, which produce cell-to-cell signals at points where axon terminals make s ...
autonomic nervous system
... • Myelin does not cover the entire length of any axon; it is interrupted by what are called nodes of Ranvier. • A nerve impulse “jumps” successively from one node of Ranvier to the next, resulting in transmission that is up to 100 times faster than neural impulses on unmeylinated axons. Copyright © ...
... • Myelin does not cover the entire length of any axon; it is interrupted by what are called nodes of Ranvier. • A nerve impulse “jumps” successively from one node of Ranvier to the next, resulting in transmission that is up to 100 times faster than neural impulses on unmeylinated axons. Copyright © ...
Presumed Apoptosis and Reduced Arcuate Nucleus
... of hypoglycemia, but the 30-min increases were significantly depressed to 5.5 and 5.2 times those at baseline during the second and third bouts, respectively. Plasma norepinephrine levels (baseline 167 ± 29 pg/ml) rose to 2.5 and 2.3 times those at baseline at 30 and 60 min during the first bout of ...
... of hypoglycemia, but the 30-min increases were significantly depressed to 5.5 and 5.2 times those at baseline during the second and third bouts, respectively. Plasma norepinephrine levels (baseline 167 ± 29 pg/ml) rose to 2.5 and 2.3 times those at baseline at 30 and 60 min during the first bout of ...
Brain
The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. Only a few invertebrates such as sponges, jellyfish, adult sea squirts and starfish do not have a brain; diffuse or localised nerve nets are present instead. The brain is located in the head, usually close to the primary sensory organs for such senses as vision, hearing, balance, taste, and smell. The brain is the most complex organ in a vertebrate's body. In a typical human, the cerebral cortex (the largest part) is estimated to contain 15–33 billion neurons, each connected by synapses to several thousand other neurons. These neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells.Physiologically, the function of the brain is to exert centralized control over the other organs of the body. The brain acts on the rest of the body both by generating patterns of muscle activity and by driving the secretion of chemicals called hormones. This centralized control allows rapid and coordinated responses to changes in the environment. Some basic types of responsiveness such as reflexes can be mediated by the spinal cord or peripheral ganglia, but sophisticated purposeful control of behavior based on complex sensory input requires the information integrating capabilities of a centralized brain.The operations of individual brain cells are now understood in considerable detail but the way they cooperate in ensembles of millions is yet to be solved. Recent models in modern neuroscience treat the brain as a biological computer, very different in mechanism from an electronic computer, but similar in the sense that it acquires information from the surrounding world, stores it, and processes it in a variety of ways, analogous to the central processing unit (CPU) in a computer.This article compares the properties of brains across the entire range of animal species, with the greatest attention to vertebrates. It deals with the human brain insofar as it shares the properties of other brains. The ways in which the human brain differs from other brains are covered in the human brain article. Several topics that might be covered here are instead covered there because much more can be said about them in a human context. The most important is brain disease and the effects of brain damage, covered in the human brain article because the most common diseases of the human brain either do not show up in other species, or else manifest themselves in different ways.