48_lecture_presentation - Course
... • An action potential can travel long distances by regenerating itself along the axon. • At the site where the action potential is generated, usually the axon hillock, an electrical current depolarizes the neighboring region of the axon membrane. • Inactivated Na+ channels behind the zone of depolar ...
... • An action potential can travel long distances by regenerating itself along the axon. • At the site where the action potential is generated, usually the axon hillock, an electrical current depolarizes the neighboring region of the axon membrane. • Inactivated Na+ channels behind the zone of depolar ...
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... glia cells is described. On the basis of this information, the principles of the generation of extracellular field potentials are outlined and the various types of field potentials are characterized. ...
... glia cells is described. On the basis of this information, the principles of the generation of extracellular field potentials are outlined and the various types of field potentials are characterized. ...
Critical Time Window of Neuronal Cholesterol Synthesis during
... normal as assessed by histological stainings (Gallyas for myelinated fiber tracts; Golgi for random labeling of individual neurons) and marker expression (NeuN for differentiated neurons; Ctip2 for layer 5/6 projection neurons) (Fig. 1a– d). Neither microglia activation nor astrogliosis was observed ...
... normal as assessed by histological stainings (Gallyas for myelinated fiber tracts; Golgi for random labeling of individual neurons) and marker expression (NeuN for differentiated neurons; Ctip2 for layer 5/6 projection neurons) (Fig. 1a– d). Neither microglia activation nor astrogliosis was observed ...
Activity of Ventral Medial Thalamic Neurons during
... Bruno et al., 2003; Paz et al., 2005a). To obtain long-lasting stable intracellular recordings, rats were immobilized with gallamine triethiodide (40 mg, i.m., every 2 h; Specia, Paris, France) and artificially ventilated. The degree of anesthesia was assessed by continuously monitoring the EEG and ...
... Bruno et al., 2003; Paz et al., 2005a). To obtain long-lasting stable intracellular recordings, rats were immobilized with gallamine triethiodide (40 mg, i.m., every 2 h; Specia, Paris, France) and artificially ventilated. The degree of anesthesia was assessed by continuously monitoring the EEG and ...
XVI. COMMUNICATIONS BIOPHYSICS W. Dr. Ursula
... obstacle to its interpretation as the result of a primary discharge. It is interesting to compare, for a given subject, the psychophysical threshold with the click intensity at which a physiological respon ...
... obstacle to its interpretation as the result of a primary discharge. It is interesting to compare, for a given subject, the psychophysical threshold with the click intensity at which a physiological respon ...
State-dependent and cell type-specific temporal processing in
... in spike count variability at stimulus onset during the desynchronized state while cortical narrow spiking cells show increased spike rate. Importantly, AC shows distinct response dynamics, with quicker rebound firing during the desynchronized state. This temporal profile was further associated with ...
... in spike count variability at stimulus onset during the desynchronized state while cortical narrow spiking cells show increased spike rate. Importantly, AC shows distinct response dynamics, with quicker rebound firing during the desynchronized state. This temporal profile was further associated with ...
Cortico–basal ganglia circuit mechanism for a decision threshold in
... Growing evidence from primate neurophysiology and modeling indicates that in reaction time tasks, a perceptual choice is made when the firing rate of a selective cortical neural population reaches a threshold. This raises two questions: what is the neural substrate of the threshold and how can it be ...
... Growing evidence from primate neurophysiology and modeling indicates that in reaction time tasks, a perceptual choice is made when the firing rate of a selective cortical neural population reaches a threshold. This raises two questions: what is the neural substrate of the threshold and how can it be ...
Glucocorticoids Enhance the Excitability of Principal Basolateral
... Figure 1. Experimental approach and identification of principal BLA neurons. A, Scheme showing the position of the recording the BLA as shown in Figure 1 A. The positions (pipette, Rec.) and stimulation (dots, Stim.) sites on a coronal section of the rat amygdala. The stimulation electrodes were of ...
... Figure 1. Experimental approach and identification of principal BLA neurons. A, Scheme showing the position of the recording the BLA as shown in Figure 1 A. The positions (pipette, Rec.) and stimulation (dots, Stim.) sites on a coronal section of the rat amygdala. The stimulation electrodes were of ...
Sensorimotor cortical influences on cuneate nucleus
... to avoid spread of current to the corona radiata. Rectangular pulses were applied between both terminals of each bipolar electrode. Electrical stimuli were isolated from the ground providing constant current to the preparation by using a transistorized optically coupled unit (Grass PSIU6, Quincy, MA ...
... to avoid spread of current to the corona radiata. Rectangular pulses were applied between both terminals of each bipolar electrode. Electrical stimuli were isolated from the ground providing constant current to the preparation by using a transistorized optically coupled unit (Grass PSIU6, Quincy, MA ...
Response characteristics in the lateral geniculate nucleus (LGN
... The RF-composition described above is called the "linear summation eld" of the RF. Linearity of spatial contrast integration is usually tested by ashing or counter-phasing (contrast reversal) a grating of optimal spatial frequency at di erent positions (spatial phases) with respect to the center o ...
... The RF-composition described above is called the "linear summation eld" of the RF. Linearity of spatial contrast integration is usually tested by ashing or counter-phasing (contrast reversal) a grating of optimal spatial frequency at di erent positions (spatial phases) with respect to the center o ...
ARTICLES - Test Page
... increase in neuronal number in the dentate gyrus in adult rats11–15. Furthermore, it has been shown that newly formed neurons are incorporated into the functional networks of both the olfactory bulb and the dentate gyrus, suggesting important roles for adult neurogenesis in brain functions16–18. Des ...
... increase in neuronal number in the dentate gyrus in adult rats11–15. Furthermore, it has been shown that newly formed neurons are incorporated into the functional networks of both the olfactory bulb and the dentate gyrus, suggesting important roles for adult neurogenesis in brain functions16–18. Des ...
Synaptic inhibition is caused by:
... a. synaptic cleft (gap) b. post-synaptic receptors c. synaptic vesicles d. endoplasmic reticulum of the neuron's soma e. dendritic endings ...
... a. synaptic cleft (gap) b. post-synaptic receptors c. synaptic vesicles d. endoplasmic reticulum of the neuron's soma e. dendritic endings ...
Activity of Bipolar Potential Generation in Paramecium
... system controlled by stable timing clock established in neural group [1-4]. A single neuron operates as an active device for amplification of reception potentials (signals) and/or generation of positive potential pulses [5,6]. Principle of operations in living neural system still remains unknown exc ...
... system controlled by stable timing clock established in neural group [1-4]. A single neuron operates as an active device for amplification of reception potentials (signals) and/or generation of positive potential pulses [5,6]. Principle of operations in living neural system still remains unknown exc ...
Neurons of human nucleus accumbens
... We found four major types of neurons in human nucleus accumbens. Fusiform and multipolar types of neurons which we found in human nucleus accumbens correspond to the spiny I type of neurons in monkey striatum described by Di Figlia et al. 12. Our fusiform neuron (type I) could correspond to the spin ...
... We found four major types of neurons in human nucleus accumbens. Fusiform and multipolar types of neurons which we found in human nucleus accumbens correspond to the spiny I type of neurons in monkey striatum described by Di Figlia et al. 12. Our fusiform neuron (type I) could correspond to the spin ...
The functional role of GABA and glycine in monaural and binaural
... The IC of bats has been studied extensively in neurophysiological and neuroanatomical research (review: Pollak and Casseday 1989). Single unit recordings in the IC have shown that the excitatory tuning curves are flanked by lateral inhibitory sidebands (M611er 1978; Suga 1969; Suga and Schlegel 1973 ...
... The IC of bats has been studied extensively in neurophysiological and neuroanatomical research (review: Pollak and Casseday 1989). Single unit recordings in the IC have shown that the excitatory tuning curves are flanked by lateral inhibitory sidebands (M611er 1978; Suga 1969; Suga and Schlegel 1973 ...
Stochastic dynamics as a principle of brain function
... spiking noise. We show that the spiking noise is a significant contribution to the outcome that is reached, in that this noise is a factor in a network with a finite (i.e., limited) number of neurons. The spiking noise can be described as introducing statistical fluctuations into the finite-size system. ...
... spiking noise. We show that the spiking noise is a significant contribution to the outcome that is reached, in that this noise is a factor in a network with a finite (i.e., limited) number of neurons. The spiking noise can be described as introducing statistical fluctuations into the finite-size system. ...
Evidence for implication of primate area V1 in neural 3
... eccentricities larger than 10°, show that horizontal disparity is encoded at least up to 20° around both the horizontal and vertical meridians. At these large retinal eccentricities we found that vertical disparity is also encoded with tuning profiles similar to those of horizontal disparity coding. ...
... eccentricities larger than 10°, show that horizontal disparity is encoded at least up to 20° around both the horizontal and vertical meridians. At these large retinal eccentricities we found that vertical disparity is also encoded with tuning profiles similar to those of horizontal disparity coding. ...
the spinal cord and the influence of its damage on
... In spinal cord injury, the destruction of nerve fibres that carry motor signals from the brain to the torso and limbs leads to muscle paralysis. Destruction of sensory nerve fibres can lead to loss of sensations such as touch, pressure and temperature. Largely unknown is that the spinal cord control ...
... In spinal cord injury, the destruction of nerve fibres that carry motor signals from the brain to the torso and limbs leads to muscle paralysis. Destruction of sensory nerve fibres can lead to loss of sensations such as touch, pressure and temperature. Largely unknown is that the spinal cord control ...
189084_189084 - espace@Curtin
... Dopamine neurons have been a focus of scientific attention ever since the discovery of dopamine as an important neurotransmitter in its own right (Carlsson et al. 1962), and the observation that it was significantly depleted in the brains of patients with Parkinson‟s disease (Davie 2008; Hornykiewic ...
... Dopamine neurons have been a focus of scientific attention ever since the discovery of dopamine as an important neurotransmitter in its own right (Carlsson et al. 1962), and the observation that it was significantly depleted in the brains of patients with Parkinson‟s disease (Davie 2008; Hornykiewic ...
Auditory Cortical Neurons are Sensitive to Static and Continuously
... neurons in the primary auditory (AI) cortex of the anesthetized cat was studied at stimulus frequencies ranging from 120 to 2,500 Hz. Best frequencies of the 43 AI cells sensitive to IPD ranged from 190 to 2,400 Hz. 2. A static IPD was produced when a pair of low-frequency tone bursts, differing fro ...
... neurons in the primary auditory (AI) cortex of the anesthetized cat was studied at stimulus frequencies ranging from 120 to 2,500 Hz. Best frequencies of the 43 AI cells sensitive to IPD ranged from 190 to 2,400 Hz. 2. A static IPD was produced when a pair of low-frequency tone bursts, differing fro ...
Serotonin release from the neuronal cell body and its long
... which have provided most of our direct knowledge about serotonergic synaptic transmission (for review, see [19]). ...
... which have provided most of our direct knowledge about serotonergic synaptic transmission (for review, see [19]). ...
Slide 1
... the thalamus is blocked. For additional details on these modes of firing in thalamic relay neurons, as well as the membrane currents that underlie the rhythmic bursting mode, please see Chapter 5, Figure 5.14. From Weyand et al. (2001), J. Neurophysiology 85:1107–18). Copyright © 2014 Elsevier Inc. ...
... the thalamus is blocked. For additional details on these modes of firing in thalamic relay neurons, as well as the membrane currents that underlie the rhythmic bursting mode, please see Chapter 5, Figure 5.14. From Weyand et al. (2001), J. Neurophysiology 85:1107–18). Copyright © 2014 Elsevier Inc. ...
The Beautiful Brain - Weisman Art Museum
... He sometimes made a pencil drawing and then went over the pencil in black ink. He did not erase the pencil lines so they are often visible. He used cross-hatching, small dots, ink washes, and occasionally watercolor, to emphasize certain kinds of cells or to distinguish parts of an individual cell. ...
... He sometimes made a pencil drawing and then went over the pencil in black ink. He did not erase the pencil lines so they are often visible. He used cross-hatching, small dots, ink washes, and occasionally watercolor, to emphasize certain kinds of cells or to distinguish parts of an individual cell. ...
FREE Sample Here
... Study Objective 1: SO 12.3 Describe the types of electrical signals that permit communication among neurons. Study Objective 2: SO 12.3.3 Describe the factors that maintain a resting membrane potential. Section Reference 1: Sec 12.3 Electrical Signals in Neurons 12) Na+/K+–ATPase is considered to be ...
... Study Objective 1: SO 12.3 Describe the types of electrical signals that permit communication among neurons. Study Objective 2: SO 12.3.3 Describe the factors that maintain a resting membrane potential. Section Reference 1: Sec 12.3 Electrical Signals in Neurons 12) Na+/K+–ATPase is considered to be ...