Towards Detection of Brain Tumor in Electroencephalogram
... including a simple dot product of signal vectors, polynomial versions of the dot product, and a radial basis function. The radial basis function SVM appears to provide superior performance in classifying functional classes of EEG signal when compared to the other SVM similarity metrics. EEG records ...
... including a simple dot product of signal vectors, polynomial versions of the dot product, and a radial basis function. The radial basis function SVM appears to provide superior performance in classifying functional classes of EEG signal when compared to the other SVM similarity metrics. EEG records ...
Contextual modulation of primary visual cortex by auditory signals
... feedforward geniculate inputs activate classical receptive fields, whereas auditory signals activate the non-classical receptive field of V1 neurons, carried by cortical feedback. Top-down auditory signals to V1 may originate directly from auditory cortex, or indirectly via extrastriate cortex or mu ...
... feedforward geniculate inputs activate classical receptive fields, whereas auditory signals activate the non-classical receptive field of V1 neurons, carried by cortical feedback. Top-down auditory signals to V1 may originate directly from auditory cortex, or indirectly via extrastriate cortex or mu ...
Lecture 2: The Spinal Cord
... from somatic and visceral receptors to the brain, and conduct efferent impulses from brain to effectors. • Related to reflexes ...
... from somatic and visceral receptors to the brain, and conduct efferent impulses from brain to effectors. • Related to reflexes ...
Slide 1
... FIGURE 11.8 Dendritic excitability and synaptic plasticity. (A) Blocking backpropagating action potentials with dendritic application of TTX prevents the induction of LTP by pairing EPSPs with action potential firing. (a) CA1 pyramidal neuron filled with a Ca 2+-sensitive dye showing approximate lo ...
... FIGURE 11.8 Dendritic excitability and synaptic plasticity. (A) Blocking backpropagating action potentials with dendritic application of TTX prevents the induction of LTP by pairing EPSPs with action potential firing. (a) CA1 pyramidal neuron filled with a Ca 2+-sensitive dye showing approximate lo ...
Saccade-induced activity of dorsal lateral geniculate nucleus X
... Hess, 1991). Eye movements were measured relative to the stationary head, which was placed in the center of the magnetic field. Recording sessions typically lasted for 2.5 h or as long as no signs of discomfort for the cats were seen. Extracellular recordings were made from single units in the A-lam ...
... Hess, 1991). Eye movements were measured relative to the stationary head, which was placed in the center of the magnetic field. Recording sessions typically lasted for 2.5 h or as long as no signs of discomfort for the cats were seen. Extracellular recordings were made from single units in the A-lam ...
(2007) The most superficial sublamina of rat superior colluculus
... conditions throughout as well as very stable recordings. At the end of the experiment, the cannula was removed and the skin lesion was treated with antibiotic ointment. Because of the microscopic size of the damage area, no sutures were needed. The animal was allowed to recover from the anesthesia, ...
... conditions throughout as well as very stable recordings. At the end of the experiment, the cannula was removed and the skin lesion was treated with antibiotic ointment. Because of the microscopic size of the damage area, no sutures were needed. The animal was allowed to recover from the anesthesia, ...
Comparison of Sympathetic and Parasympathetic Divisions
... chemoreceptors, are distributed throughout the body. Mechanoreceptors sense pressure, stretch, or tension. Slow-adapting mechanoreceptors sense fullness in the bowel, bladder, and stomach. Fast-adapting mechanoreceptors sense the movement in the lungs and arteries. The second receptor type, chemorec ...
... chemoreceptors, are distributed throughout the body. Mechanoreceptors sense pressure, stretch, or tension. Slow-adapting mechanoreceptors sense fullness in the bowel, bladder, and stomach. Fast-adapting mechanoreceptors sense the movement in the lungs and arteries. The second receptor type, chemorec ...
Anatomical Changes in Human Motor Cortex and Motor Pathways
... These cerebellar changes are surprising given that unlike the primary motor and sensory cortices, which have direct connections with the injured region, that is, the spinal cord; the bulk of superior cerebellar cortex connections are with the brainstem and cerebral cortex. This indicates that second ...
... These cerebellar changes are surprising given that unlike the primary motor and sensory cortices, which have direct connections with the injured region, that is, the spinal cord; the bulk of superior cerebellar cortex connections are with the brainstem and cerebral cortex. This indicates that second ...
`off` responses in cat visual cortical receptive fields
... extracellular recordings. Electrodes which appeared to leak electrolyte under microscopic examination of their tip, or for which an increase in spontaneous activity was observed during preliminary phases of recording, were discarded. For each cell, the shape of the action potential (amplitude rangin ...
... extracellular recordings. Electrodes which appeared to leak electrolyte under microscopic examination of their tip, or for which an increase in spontaneous activity was observed during preliminary phases of recording, were discarded. For each cell, the shape of the action potential (amplitude rangin ...
The Differential Role of Motor Cortex in Stretch Reflex Modulation
... extent that the human motor cortex is deeply involved in reflex regulation and it is common to speak of “transcortical reflex loops.” Such loops appear to add flexibility to the human stretch reflex, once considered to be immutable, allowing it to adapt across a range of functional tasks. However, t ...
... extent that the human motor cortex is deeply involved in reflex regulation and it is common to speak of “transcortical reflex loops.” Such loops appear to add flexibility to the human stretch reflex, once considered to be immutable, allowing it to adapt across a range of functional tasks. However, t ...
ATTENTIONAL MODULATION OF VISUAL PROCESSING John H
... Both increases and decreases are observed, depending on the neuron’s selectivity for the two stimuli. When one of the two stimuli is placed in the receptive field and the other in the surround, attending to the extrareceptive field stimulus can reduce the firing rate. All these phenomena can be acco ...
... Both increases and decreases are observed, depending on the neuron’s selectivity for the two stimuli. When one of the two stimuli is placed in the receptive field and the other in the surround, attending to the extrareceptive field stimulus can reduce the firing rate. All these phenomena can be acco ...
Sten Grillner
... I interacted closely with Orlovsky, who performed elegant and technically demanding experiments on the fast-descending tracts modulated by cerebellum during each step cycle, and the pathways to cerebellum that conveyed information on the ongoing movements, as well as efference copy information about ...
... I interacted closely with Orlovsky, who performed elegant and technically demanding experiments on the fast-descending tracts modulated by cerebellum during each step cycle, and the pathways to cerebellum that conveyed information on the ongoing movements, as well as efference copy information about ...
A Feedback Model of Visual Attention
... The Reynolds and Desimone model, in common with others (e.g., Olshausen et al., 1993), uses top-down signals to multiplicatively modulate the synaptic strengths of inter-regional connections so that attended information can be selectively routed to higher cortical regions. Equivalent results can be ...
... The Reynolds and Desimone model, in common with others (e.g., Olshausen et al., 1993), uses top-down signals to multiplicatively modulate the synaptic strengths of inter-regional connections so that attended information can be selectively routed to higher cortical regions. Equivalent results can be ...
Experimental spinal cord transplantation as a mechanism of
... survive but send axons through peripheral nerves to innervate muscle.IS Stimulation of the peripheral nerve containing the regenerated axons of the grafted fetal neurons results in contraction of the innervated muscle. This is a significant and major accomplishment. As with the regeneration of perip ...
... survive but send axons through peripheral nerves to innervate muscle.IS Stimulation of the peripheral nerve containing the regenerated axons of the grafted fetal neurons results in contraction of the innervated muscle. This is a significant and major accomplishment. As with the regeneration of perip ...
High-frequency stimulation in Parkinson`s disease: more
... inhibition (12%) in half of the neurons recorded [26]. Shortcomings of the ‘less’ hypothesis The silencing hypothesis is based on extracellular recordings during very short periods of HFS (Table 2). One potential problem with studies relying on extracellular recordings is that large stimulus artifac ...
... inhibition (12%) in half of the neurons recorded [26]. Shortcomings of the ‘less’ hypothesis The silencing hypothesis is based on extracellular recordings during very short periods of HFS (Table 2). One potential problem with studies relying on extracellular recordings is that large stimulus artifac ...
Monkey Models of Recovery of Voluntary Hand
... macaque’s hand and forearm, causing profound and lasting impairment of voluntary manipulative movements (Mott and Sherrington 1895; Vierck 1982) and considerable neuronal reorganization at different levels of the neuraxis (Pons et al. 1991; Woods et al. 2000). This result is also true in humans, whe ...
... macaque’s hand and forearm, causing profound and lasting impairment of voluntary manipulative movements (Mott and Sherrington 1895; Vierck 1982) and considerable neuronal reorganization at different levels of the neuraxis (Pons et al. 1991; Woods et al. 2000). This result is also true in humans, whe ...
Chapter 15 - Houston Community College Learning Web
... • On third-order neurons in one of the ventral nuclei of the thalamus • Nuclei sort the arriving information according to: • The nature of the stimulus • The region of the body involved ...
... • On third-order neurons in one of the ventral nuclei of the thalamus • Nuclei sort the arriving information according to: • The nature of the stimulus • The region of the body involved ...
Attention induces synchronization-based response gain in steady
... (or activity) gain in terms of increased phase locking of population activity to stimulus flicker, SSVEP amplitudes might be sensitive enough to demonstrate response (or activity) gain. Indeed, some of the data reported in a prior SSVEP study2 are suggestive of multiplicative attention effects on SS ...
... (or activity) gain in terms of increased phase locking of population activity to stimulus flicker, SSVEP amplitudes might be sensitive enough to demonstrate response (or activity) gain. Indeed, some of the data reported in a prior SSVEP study2 are suggestive of multiplicative attention effects on SS ...
segregation of stimulus phase and intensity coding in the cochlear
... of discrimination which select some arbitrary cutoff level (along some quantitative measure of phase locking such as vector strength) and reject any responses which fall below that level. These methods are artificial because some assumption must be made about what does or does not represent a level ...
... of discrimination which select some arbitrary cutoff level (along some quantitative measure of phase locking such as vector strength) and reject any responses which fall below that level. These methods are artificial because some assumption must be made about what does or does not represent a level ...
Suppression of Neural Responses to Nonoptimal Stimuli Correlates
... (, ). We denote all gratings in the stimulus space by S(kmax). Each frame in the stimulus is drawn at random from S(kmax) with a uniform distribution. To visualize the data, we compare the probability attained by each grating in the stimulus space to a baseline. A natural choice for the baseline i ...
... (, ). We denote all gratings in the stimulus space by S(kmax). Each frame in the stimulus is drawn at random from S(kmax) with a uniform distribution. To visualize the data, we compare the probability attained by each grating in the stimulus space to a baseline. A natural choice for the baseline i ...
Behavioral Response and Transmitter Release During Atonia
... was identified with potassium ferrocyanide staining. ...
... was identified with potassium ferrocyanide staining. ...
The dual-pathway model of auditory signal
... neuroanatomically segregated based on task demands even when stimuli are identical across tasks. Nevertheless, studies in this line of dissociation of “where” and “what” processing have adopted working memory paradigms that require sound information to be perceived, temporarily stored, reorganized, ...
... neuroanatomically segregated based on task demands even when stimuli are identical across tasks. Nevertheless, studies in this line of dissociation of “where” and “what” processing have adopted working memory paradigms that require sound information to be perceived, temporarily stored, reorganized, ...
NMDA Receptors Contribute to Primary Visceral Afferent
... synaptic transmission in the NTS may be due to true differences in the glutamate receptor subtypes activated in these different autonomic reflex pathways or to limitations of the microinjection technique, which typically relies on relatively large volumes (10–100 nl) of highly concentrated agents th ...
... synaptic transmission in the NTS may be due to true differences in the glutamate receptor subtypes activated in these different autonomic reflex pathways or to limitations of the microinjection technique, which typically relies on relatively large volumes (10–100 nl) of highly concentrated agents th ...
Clinically oriented anatomy of the brainstem
... • Part of the auditory pathway from the inferior collicle to the medial geniculate body • Lateral lemniscus : part of the auditory pathway • Medial M di l longitudinal l it di l fascicle: f i l part of the vestibular system (contains descending fibers, too) ...
... • Part of the auditory pathway from the inferior collicle to the medial geniculate body • Lateral lemniscus : part of the auditory pathway • Medial M di l longitudinal l it di l fascicle: f i l part of the vestibular system (contains descending fibers, too) ...