the nervous system
... Messages are in the form of electronic signals called impulses. A neuron relays impulses in only one direction. Messages are relayed from one neuron to another at the synapse. The axon terminals of one neuron are very close to the dendrite of another, allowing messages to jump from one neuron to the ...
... Messages are in the form of electronic signals called impulses. A neuron relays impulses in only one direction. Messages are relayed from one neuron to another at the synapse. The axon terminals of one neuron are very close to the dendrite of another, allowing messages to jump from one neuron to the ...
Document
... • Structural units of the nervous system • Composed of a body, axon, and dendrites • Long-lived, amitotic, and have a high metabolic rate ...
... • Structural units of the nervous system • Composed of a body, axon, and dendrites • Long-lived, amitotic, and have a high metabolic rate ...
Role of the neural crest in development of the trabeculae and
... control and normal control embryos was accomplished in full-strength Holtfreter's solution in the dark, at 21 °C for 14 days. By this time, the embryos had reached stage 17 (the larval burrowing stage; Piavis, 1961, 1971) during which normal embryos display extensive development of the head skeleton ...
... control and normal control embryos was accomplished in full-strength Holtfreter's solution in the dark, at 21 °C for 14 days. By this time, the embryos had reached stage 17 (the larval burrowing stage; Piavis, 1961, 1971) during which normal embryos display extensive development of the head skeleton ...
Neural Network Dynamics
... implies that the phase relationship between the different periodic patterns changes on every cycle forever. Finally, chaotic activity is nonrepeating and is characterized by extreme sensitivity to initial conditions. Stable fixed, oscillatory, or chaotic states are often called attractors because nea ...
... implies that the phase relationship between the different periodic patterns changes on every cycle forever. Finally, chaotic activity is nonrepeating and is characterized by extreme sensitivity to initial conditions. Stable fixed, oscillatory, or chaotic states are often called attractors because nea ...
Neural correlates of consciousness: A definition of the dorsal and
... theory states that each organism–object interaction can be described by the two quantitative measures of torque and change in joint position served by the basal ganglia and cerebellum, respectively. This leads to a component theory of motor efference copy providing a fundamental tool for categorizin ...
... theory states that each organism–object interaction can be described by the two quantitative measures of torque and change in joint position served by the basal ganglia and cerebellum, respectively. This leads to a component theory of motor efference copy providing a fundamental tool for categorizin ...
Eagleman Ch 8. Attention and Consciousness
... If the cue correctly predicts the stimulus, there is a reaction time benefit. If the cue incorrectly predicts the stimulus, there is a reaction time cost. Top-down mechanisms focus voluntary (endogenous) attention. Bottom-up mechanisms focus involuntary (exogenous) attention. ...
... If the cue correctly predicts the stimulus, there is a reaction time benefit. If the cue incorrectly predicts the stimulus, there is a reaction time cost. Top-down mechanisms focus voluntary (endogenous) attention. Bottom-up mechanisms focus involuntary (exogenous) attention. ...
Midterm 1 from 2014 key
... complex 5. Nanos -localized inhibitor of maternal Hb translation in posterior regions of early fly embryo. 6. Cactus- IKB. Cytoplasmic inhibitor of Dorsal. Depleted by Toll signaling 7. Ring canal- Connection between germ cells in ovary due to incomplete cell ...
... complex 5. Nanos -localized inhibitor of maternal Hb translation in posterior regions of early fly embryo. 6. Cactus- IKB. Cytoplasmic inhibitor of Dorsal. Depleted by Toll signaling 7. Ring canal- Connection between germ cells in ovary due to incomplete cell ...
An Introduction to the Nervous System
... • Ion Movements and Electrical Signals • All plasma (cell) membranes produce electrical signals by ion ...
... • Ion Movements and Electrical Signals • All plasma (cell) membranes produce electrical signals by ion ...
Harris KD. Neural signatures of cell assembly organization. Nat Rev
... computational network models. One of the most prominent of these is the auto-associative or ‘Hopfield’ network92–95. In learning mode, these networks store externally presented patterns through the modification of recurrent excitatory synapses, according to a Hebbian rule. In recall mode, the state ...
... computational network models. One of the most prominent of these is the auto-associative or ‘Hopfield’ network92–95. In learning mode, these networks store externally presented patterns through the modification of recurrent excitatory synapses, according to a Hebbian rule. In recall mode, the state ...
Memory from the dynamics of intrinsic membrane currents
... Sustained neuronal activity in response to a brief stimulus has been proposed to underlie some short-term memory tasks (see other papers in this colloquium). For many years, the assumption was made that such sustained activity resulted from reverberating activity through excitatory feedback loops. H ...
... Sustained neuronal activity in response to a brief stimulus has been proposed to underlie some short-term memory tasks (see other papers in this colloquium). For many years, the assumption was made that such sustained activity resulted from reverberating activity through excitatory feedback loops. H ...
Slide 1
... fibers. Type II neurons have similar excitatory areas and are inferred to have inhibitory flanking areas because they have little response to broadband signals like noise. Type III neurons have similar excitatory areas and definite inhibitory areas on either side. Type IV neurons have a small excita ...
... fibers. Type II neurons have similar excitatory areas and are inferred to have inhibitory flanking areas because they have little response to broadband signals like noise. Type III neurons have similar excitatory areas and definite inhibitory areas on either side. Type IV neurons have a small excita ...
초록리스트
... Glutamate is a major excitatory neurotransmitter in the midbrain dopamine neurons which activates AMPA- and NMDA-type glutamate receptors. Dendrites of midbrain dopamine neurons have rare spines and thus do not possess a clear morphological basis for synapse-specific compartmentalization. Therefore, ...
... Glutamate is a major excitatory neurotransmitter in the midbrain dopamine neurons which activates AMPA- and NMDA-type glutamate receptors. Dendrites of midbrain dopamine neurons have rare spines and thus do not possess a clear morphological basis for synapse-specific compartmentalization. Therefore, ...
Full Text
... gastrula halves of the same side, for instance two right ones, were fused together. As a result, the half blastoporal lips completed themselves from adjacent material of the fused other half, and in this way, whole neural plates were formed (Spemann 1918). Thus, the concept of the organization cente ...
... gastrula halves of the same side, for instance two right ones, were fused together. As a result, the half blastoporal lips completed themselves from adjacent material of the fused other half, and in this way, whole neural plates were formed (Spemann 1918). Thus, the concept of the organization cente ...
Presentation 5: The Role of the Nervous System
... Synapse: Area between the synaptic knob of one neuron and the membrane of another neuron ...
... Synapse: Area between the synaptic knob of one neuron and the membrane of another neuron ...
Chapter 48
... Synaptic terminals Axon – takes signal away from cell body Axon hillock – cell body region where impulse is generated & axon begins Myelin – sheath that insulates axons made of supporting cells - PNS – Schwann cells secrete myelin - CNS – oligodendrocytes secrete myelin Synapse – junction between ne ...
... Synaptic terminals Axon – takes signal away from cell body Axon hillock – cell body region where impulse is generated & axon begins Myelin – sheath that insulates axons made of supporting cells - PNS – Schwann cells secrete myelin - CNS – oligodendrocytes secrete myelin Synapse – junction between ne ...
1 Neural Affective Decision Theory: Choices, Brains, and Emotions
... by theories disconnected from the study of cognitive, emotional and socially motivated phenomena, such as a common hypersensitivity to losses over equivalent gains (Kahneman & Tversky, 1979) and the affective influence of prior expectations and counterfactual comparisons on preference judgments (Mel ...
... by theories disconnected from the study of cognitive, emotional and socially motivated phenomena, such as a common hypersensitivity to losses over equivalent gains (Kahneman & Tversky, 1979) and the affective influence of prior expectations and counterfactual comparisons on preference judgments (Mel ...
Developmental Patterns
... • Cleavage subdivides the mass of zygote until a cluster of cells called a blastula is formed (looks like a hollow mass of cells). • In most animals, the cells are arranged around a central fluid-filled cavity called a blastocoel. • Formation of a blastula stage, with its one layer of germ cells, oc ...
... • Cleavage subdivides the mass of zygote until a cluster of cells called a blastula is formed (looks like a hollow mass of cells). • In most animals, the cells are arranged around a central fluid-filled cavity called a blastocoel. • Formation of a blastula stage, with its one layer of germ cells, oc ...
Perception - U
... • Individuals with damage to primary visual cortex have scotomas or areas of blindness in corresponding areas of the visual field • Amazingly, when forced to guess, some brain-damaged patients can respond to stimuli in their scotomas (e.g., can grab a moving object or guess the direction of its move ...
... • Individuals with damage to primary visual cortex have scotomas or areas of blindness in corresponding areas of the visual field • Amazingly, when forced to guess, some brain-damaged patients can respond to stimuli in their scotomas (e.g., can grab a moving object or guess the direction of its move ...
Target-cell-specific concentration of a metabotropic glutamate
... have at least a ten· fold higher level of presynaptic mGluR7 than terminals making synapses with pyramidal cells and other types of interneuron. Distinct levels of mGluR7 are fo und at different synapses made by individual pyramidal axons or even single boutons. These results raise the possibility t ...
... have at least a ten· fold higher level of presynaptic mGluR7 than terminals making synapses with pyramidal cells and other types of interneuron. Distinct levels of mGluR7 are fo und at different synapses made by individual pyramidal axons or even single boutons. These results raise the possibility t ...
Central Nervous System
... The cerebral cortex is the executive suite of the nervous system The cortex refers to the upper outer layer of the cerebrum and contains mostly neuron cell bodies, dendrites and unmyelinated axons (the gray matter). This cortex gray matter governs all aspects and qualities of our conscious behavior. ...
... The cerebral cortex is the executive suite of the nervous system The cortex refers to the upper outer layer of the cerebrum and contains mostly neuron cell bodies, dendrites and unmyelinated axons (the gray matter). This cortex gray matter governs all aspects and qualities of our conscious behavior. ...
10. The Nervous System: Making Sense
... Neurotransmitters are chemicals that control how nerve cells communicate with each other to process information and send messages to the rest of the body. They can stimulate or reduce the nerve impulse that is travelling along a certain nerve path. Neurotransmitters are central to memory, learning, ...
... Neurotransmitters are chemicals that control how nerve cells communicate with each other to process information and send messages to the rest of the body. They can stimulate or reduce the nerve impulse that is travelling along a certain nerve path. Neurotransmitters are central to memory, learning, ...
Sensation and Perception
... What is sensation? Sensation allows us to receive information from the world ...
... What is sensation? Sensation allows us to receive information from the world ...
