Nonlinear Population Codes - Department of Nonlinear Dynamics
... 1999). Recently Sompolinsky, Yoon, Kang, and Shamir (2001) studied the effect of correlations on the accuracy of population coding. They showed that long-range positive correlations that vary smoothly with the functional distance between the neurons lead to saturation of the accuracy by which the st ...
... 1999). Recently Sompolinsky, Yoon, Kang, and Shamir (2001) studied the effect of correlations on the accuracy of population coding. They showed that long-range positive correlations that vary smoothly with the functional distance between the neurons lead to saturation of the accuracy by which the st ...
Chapter 49 and 50 Presentations-Sensory and Motor Mechanisms
... this information must be relayed quickly so that an appropriate response can occur. This relay of information is accomplished via an action potential which synapses with a series of other neurons along the way—sometimes up to 100,000! ...
... this information must be relayed quickly so that an appropriate response can occur. This relay of information is accomplished via an action potential which synapses with a series of other neurons along the way—sometimes up to 100,000! ...
Neural network
... • Massive parallelism allows for computational efficiency. • Help understand “distributed” nature of neural representations (rather than “localist” representation) that allow robustness and graceful degradation. • Intelligent behavior as an “emergent” property of large number of simple units rather ...
... • Massive parallelism allows for computational efficiency. • Help understand “distributed” nature of neural representations (rather than “localist” representation) that allow robustness and graceful degradation. • Intelligent behavior as an “emergent” property of large number of simple units rather ...
Motor Cortical Networks for Skilled Movements Have Reaching
... was used to separate periods of neural activity occurring during task performance from periods of continuous raw data acquisition. Analogue trigger signals occurred when the animal’s reaching forelimb deformed a laser beam and were used to isolate a 3-second epoch of neural data: starting 1.5 second ...
... was used to separate periods of neural activity occurring during task performance from periods of continuous raw data acquisition. Analogue trigger signals occurred when the animal’s reaching forelimb deformed a laser beam and were used to isolate a 3-second epoch of neural data: starting 1.5 second ...
house symposium 2015 - Instituto do Cérebro
... head approach and withdrawal (or extension and retraction), and (d) rapid expiration and inspiration (polypnea)”. During sniffing, all of these can synchronize at rates of 5--11 Hz, resulting in a global motor rhythm. Neuronal activity across the brain is synchronous to this behavior: it emerges fro ...
... head approach and withdrawal (or extension and retraction), and (d) rapid expiration and inspiration (polypnea)”. During sniffing, all of these can synchronize at rates of 5--11 Hz, resulting in a global motor rhythm. Neuronal activity across the brain is synchronous to this behavior: it emerges fro ...
Role of the Preoptic-Anterior Hypothalamus in
... responses can be evoked. Thus, the nervous system can select the behavioral or physiological response most appropriate and most efficient for a particular thermal stress [11–13]. The strongest evidence of the importance of the preoptic region in thermoregulation comes from studies involving direct t ...
... responses can be evoked. Thus, the nervous system can select the behavioral or physiological response most appropriate and most efficient for a particular thermal stress [11–13]. The strongest evidence of the importance of the preoptic region in thermoregulation comes from studies involving direct t ...
PDF file
... architecture that integrates three types of neurotransmitters, 5-HT, DA and Ach with Ach for increased attention efforts. Dealing with time in frame precision, that is at the rate that the simulation updates, is an unsolved problem. For example, in their Darwin V simulation [1], [22], behaviors are ...
... architecture that integrates three types of neurotransmitters, 5-HT, DA and Ach with Ach for increased attention efforts. Dealing with time in frame precision, that is at the rate that the simulation updates, is an unsolved problem. For example, in their Darwin V simulation [1], [22], behaviors are ...
simple cyclic movements as a distinct autism
... 478Krzysztof Dobosz, Dariusz Mikołajewski, Grzegorz M. Wójcik, Włodzisław Duch using the language of dynamical systems, a relatively high symbolic level of description that is linked to both neural functions and behavioral observations. Similar dysfunctions of the ion channels in association cortex ...
... 478Krzysztof Dobosz, Dariusz Mikołajewski, Grzegorz M. Wójcik, Włodzisław Duch using the language of dynamical systems, a relatively high symbolic level of description that is linked to both neural functions and behavioral observations. Similar dysfunctions of the ion channels in association cortex ...
Synaptic Integration in Rat Frontal Cortex Shaped by Network Activity
... inputs from about 10,000 neurons (Larkman 1991), each of which fires action potentials at an average rate between 1 and 10 per second in vivo (Abeles et al. 1990). As a result, there is a considerable amount of ongoing activity in the network, which is known to influence the response characteristics ...
... inputs from about 10,000 neurons (Larkman 1991), each of which fires action potentials at an average rate between 1 and 10 per second in vivo (Abeles et al. 1990). As a result, there is a considerable amount of ongoing activity in the network, which is known to influence the response characteristics ...
(B) rosiglitazone
... prevents loss of glucose sensing in POMC neurons as a result of obesity induced by a high-fat diet. ...
... prevents loss of glucose sensing in POMC neurons as a result of obesity induced by a high-fat diet. ...
Spinal Reflexes
... • Importance first recognized Sherrington • Believed that simple reflexes activated by receptors in the skin and muscles were the basic units of movement. • Also, complex sequences of movement were the combinations of simple reflexes. ...
... • Importance first recognized Sherrington • Believed that simple reflexes activated by receptors in the skin and muscles were the basic units of movement. • Also, complex sequences of movement were the combinations of simple reflexes. ...
Electrical membrane properties of rat subthalamic neurons in an in
... Direct activation by mtracellular stimulation Injections of depolarizing current pulses to STH neurons produced either repetitive or burst discharges. The duration of action potentials was about 1 ms. When neurons with a membrane potential of 40-65 mV were activated by the rejection of current pulse ...
... Direct activation by mtracellular stimulation Injections of depolarizing current pulses to STH neurons produced either repetitive or burst discharges. The duration of action potentials was about 1 ms. When neurons with a membrane potential of 40-65 mV were activated by the rejection of current pulse ...
What is C. elegans? What are its navigational strategies?
... Plasticity on two different scales: on what scale is information processed? ...
... Plasticity on two different scales: on what scale is information processed? ...
Solving the Problem of Negative Synaptic Weights in Cortical Models
... methods can be employed. Instead of finding decoders φ to decode an estimate of x (i.e., computing the identity function), the same linear leastsquares method can be used to provide decoders φ g(x) for some arbitrary function g(x). These new decoders, placed into equation 2.3, then provide the synap ...
... methods can be employed. Instead of finding decoders φ to decode an estimate of x (i.e., computing the identity function), the same linear leastsquares method can be used to provide decoders φ g(x) for some arbitrary function g(x). These new decoders, placed into equation 2.3, then provide the synap ...
PAX: A mixed hardware/software simulation platform for
... For such systems, designers generally consider simplified neuron models and balance imprecision by a higher number of neurons in the network (Indiveri, Chicca & Douglas, 2006, Fieres, Schemmel & Meier, 2006) An other approach is to reduce the number of the parameters in the system (Farquhar & Hasler ...
... For such systems, designers generally consider simplified neuron models and balance imprecision by a higher number of neurons in the network (Indiveri, Chicca & Douglas, 2006, Fieres, Schemmel & Meier, 2006) An other approach is to reduce the number of the parameters in the system (Farquhar & Hasler ...
Single-Neuron Responses in Humans during Execution and
... temporal lobe (MTL). Connections such as the uncinate fasciculus and other cortico-cortical white matter tracts between the MTL and motor regions in the frontal lobe exist [27–31]. Although there is some evidence for responses in the hippocampus during voluntary actions [32], unlike SMA, lesions in ...
... temporal lobe (MTL). Connections such as the uncinate fasciculus and other cortico-cortical white matter tracts between the MTL and motor regions in the frontal lobe exist [27–31]. Although there is some evidence for responses in the hippocampus during voluntary actions [32], unlike SMA, lesions in ...
Bursting Neurons Signal Input Slope
... slopes (dark red) always precede bursts. Note, that at ⬎10 Hz there is a frequency-dependent delay of bursts up to ⬃20 msec. This frequency-dependent delay could degrade the temporal precision of slope signaling. The frequency dependence of delay comes about because of the slow membrane properties a ...
... slopes (dark red) always precede bursts. Note, that at ⬎10 Hz there is a frequency-dependent delay of bursts up to ⬃20 msec. This frequency-dependent delay could degrade the temporal precision of slope signaling. The frequency dependence of delay comes about because of the slow membrane properties a ...
On the Significance of Neuronal Giantism in Gastropods
... The gastropods crept into the fossil record around 580 million years ago as minute animals l-2 mm in shell diameter, and today most are still smaller than 5 mm. The larger modern gastropods are thus truly somatomorphic giants; their greater body size demands enhanced innervation of the periphery. In ...
... The gastropods crept into the fossil record around 580 million years ago as minute animals l-2 mm in shell diameter, and today most are still smaller than 5 mm. The larger modern gastropods are thus truly somatomorphic giants; their greater body size demands enhanced innervation of the periphery. In ...
View PDF - Laboratory of Brain, Hearing and Behavior
... representation of those priorities [1!,3,9]. This represwww.sciencedirect.com ...
... representation of those priorities [1!,3,9]. This represwww.sciencedirect.com ...
