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The Face as a Sensory Organ
The Face as a Sensory Organ

... The ascending pathways transmit the somatosensory information collected by the facial receptors, and conveyed by the peripheral axons of the trigeminal sensory neurons (along the peripheral pathways), to higher cortical centers for processing and integration.26 These primary sensory neurons reside i ...
A1 - 58 - University of Pittsburgh
A1 - 58 - University of Pittsburgh

... actin and myosin, the proteins that will subsequently generate a muscle contraction. Myosin is a thick protein strand (also called a filament) that when electrically stimulated, begins to pull thinner actin proteins together, a process deemed the Sliding Filament Theory of Muscle Contraction. Nature ...
Non-NMDA and NMDA receptors transmit area postrema input to
Non-NMDA and NMDA receptors transmit area postrema input to

... recorded on a computer with data acquisition analysis software (RC Electronics) with a sampling rate of 10 kHz. Action potentials were presumed to arise from postsynaptic neurons if they exhibited variable onset latencies at low stimulus intensity and shorter onset latencies as the stimulus intensit ...
Saccadic Eye Movements Modulate Visual Responses in the Lateral
Saccadic Eye Movements Modulate Visual Responses in the Lateral

... Origin of the Effect This saccade-related variation of the gain of the visual response is not predicted by our current understanding of geniculate processing. It reflects an effect of saccades on either retinal activity or retinogeniculate transmission. The stimulus was designed so that saccadic mod ...
1 Removing the Constraints on Our Choices: A Psychobiological
1 Removing the Constraints on Our Choices: A Psychobiological

... people are easily distracted by movements, sounds, or smells. They notice food textures, temperatures, and spices more rapidly than others and they often let things happen without moving away from them. These individuals will often score high on Sensory Profile Questionnaire items such as: “I startl ...
Retinotopic Organization and Functional Subdivisions of the Human
Retinotopic Organization and Functional Subdivisions of the Human

... activity. The contralateral visual hemifield was represented with the lower field in the medial-superior portion and the upper field in the lateral-inferior portion of each LGN. The horizontal meridian was significantly overrepresented relative to the vertical meridian. The fovea was represented in ...
The Origins of Two-State Spontaneous Membrane Potential
The Origins of Two-State Spontaneous Membrane Potential

... membrane potential from cell to cell was an artifact of microelectrode tip potentials. Many of the recordings were maintained over a period of hours, during which time the cell was subjected to a variety of tests and current injections, including the large (l-2 nA) current injections made to inject ...
BOLD fMRI study of ultrahigh frequency encoding in the
BOLD fMRI study of ultrahigh frequency encoding in the

... predators. The mechanisms underlying the neural encoding of such UHF sounds may provide important insights for understanding neural processing of other complex sounds (e.g. human speeches). In the auditory system, sound frequency is normally encoded topographically as tonotopy, which, however, conta ...
Nervous System PPT
Nervous System PPT

... motor stimulus to interneurons of the CNS in order to create a response to the stimulus through chemical synapse activity. White Matter: It contains nerve fibers. Many of these nerve fibers (axons) are surrounded by a type of fat called myelin. The myelin gives the white matter it's color. Myelin ac ...
Chapter 4 monkey
Chapter 4 monkey

... We obtained extracellular recordings from single neurons with tungsten microelectrodes which were lowered through the dura mater with a hydraulic microdrive (Narishige). Action potentials were amplified, filtered, discriminated and recorded on-line using spike-sorter software (Tucker Davis). Each si ...
Proprioceptive Eye Position Signals Are Still Missing a Sensory
Proprioceptive Eye Position Signals Are Still Missing a Sensory

... proprioceptive representation of eye position found in primary somatosensory cortex, what are the relevant pathways? The composite nature of cortical eye position signals provides a clue: signals from multiple EOMs appear to be combined through a multisynaptic ascending pathway, to generate a delaye ...
Neurophysiologic Testing - UnitedHealthcareOnline.com
Neurophysiologic Testing - UnitedHealthcareOnline.com

... that generates precision tremor frequency and amplitude information. TremReport TM is a utility for generating comprehensive reports from tremor records and written interpretations. The current standard in evaluating Parkinson's disease (PD) tremor is the Unified Parkinson's Disease Rating Scale (UP ...
studying the isolated central nervous system
studying the isolated central nervous system

... electrogenic sodium pump component of the membrane potential. Barbara York showed that the snail neuron was sensitive to the oxygen concentration around the neuron and that reducing the Po2 brought about a depolarization of the membrane potential, whilst increasing the Po2 hyperpolarized the neuron, ...
Immunohistochemical Study of Spinal Motor Neurons Following
Immunohistochemical Study of Spinal Motor Neurons Following

... Introduction: Epineural suture and autologous graft are two routine techniques in peripheral nerve surgery. However, their efficiency can be highly limited depending on the type of lesion and the gap between two nerve stumps and because of deficient proper nerve donors. So much interest has been foc ...
Chapter 5 Learning to attend in primary visual cortex
Chapter 5 Learning to attend in primary visual cortex

... different cues (combination of shapes, contour and filling colors etc.) so that the relevant icon was distinct from the irrelevant one and the pairs of icons differed across days. In order to promote learning, the stimuli of the three difficulty levels were interleaved so that the animals could use ...
Primate Frontal Eye Fields. II. Physiological and Anatomical
Primate Frontal Eye Fields. II. Physiological and Anatomical

... After analyzing the response properties of a single neuron, we studied the effect of electrical stimulapentobarbital and perfused with 0.85% NaCl foltion at the site of that neuron by microstimulation lowed by 10% formalin in 1% NaCl. Sections, taken to the arcuate sulthrough the recording microelec ...
The Development of Neural Synchrony and Large
The Development of Neural Synchrony and Large

... during an auditory oddball paradigm. In adult participants, phase locking of alpha oscillations was significantly increased while the amplitude was lower than in children. Together with the findings from SSRs, these data suggest that during the adolescent period, cortical circuits undergo a fine-tun ...
article in press - Neurobiology of Vocal Communication
article in press - Neurobiology of Vocal Communication

... sites at which processing of vocalization takes place. A more specific approach than electrical stimulation is pharmacological stimulation with glutamate agonists or GABA antagonists. In this case, only synaptic regions, not by-passing fibers, are activated. In the squirrel monkey, a systematic expl ...
Activity Regulates the Incidence of Heteronymous Sensory
Activity Regulates the Incidence of Heteronymous Sensory

... roots were cut and placed into suction electrodes for either stimulation or recording. Motor neurons (green) were visually identified following muscle-specific labeling by CTB-488 and recorded intracellularly using whole-cell patch clamp. (B) Image of PL motor neurons retrogradely labeled at p0 with ...
Zoology 242 Anatomy of Nervous systems Lecture 8
Zoology 242 Anatomy of Nervous systems Lecture 8

... Autonomic Nervous System • 3 major divisions described by John Langley (18521925). – Enteric – Parasympathetic – Sympathetic ...
[PDF]
[PDF]

... spaces are well known and easily defined. The mathematical problem is circumscribed. In other cortical areas, such as high-order visual areas or motor areas, the parameter spaces are less well known, difficult to define precisely, and much more highly dimensional. In a recent series of experiments, ...
The Nervous System
The Nervous System

... Highly complex system of two parts – Central nervous system (CNS) ...
The Spinal Interneurons and Properties of
The Spinal Interneurons and Properties of

... tadpole was repinned so that skin and muscles over the right side of the spinal cord could be removed. A dorsal cut was then made along the midline of the spinal cord to open the neurocoel and expose neuronal cell bodies. Additional small cuts were made to expose more ventral neurons. In experiments ...
University of Groningen The hearing brain in males and
University of Groningen The hearing brain in males and

... local brain activity. The most direct, but also invasive, way of studying brain activity in the living brain is direct single cell recording, i.e. an electrode is inserted directly into the brain. This technique is restricted to animal studies because of the invasiveness. This technique gives detail ...
Saccadic Suppression of Retinotopically Localized Blood Oxygen
Saccadic Suppression of Retinotopically Localized Blood Oxygen

... of scripts written in Matlab (MathWorks, Natick, MA) that contained a more sensitive algorithm that included information about the slope of the main sequence obtained from each run. For purposes of quality control, all detected saccadic onsets from all trials were visually inspected by plotting them ...
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Evoked potential

An evoked potential or evoked response is an electrical potential recorded from the nervous system of a human or other animal following presentation of a stimulus, as distinct from spontaneous potentials as detected by electroencephalography (EEG), electromyography (EMG), or other electrophysiological recording method.Evoked potential amplitudes tend to be low, ranging from less than a microvolt to several microvolts, compared to tens of microvolts for EEG, millivolts for EMG, and often close to a volt for ECG. To resolve these low-amplitude potentials against the background of ongoing EEG, ECG, EMG, and other biological signals and ambient noise, signal averaging is usually required. The signal is time-locked to the stimulus and most of the noise occurs randomly, allowing the noise to be averaged out with averaging of repeated responses.Signals can be recorded from cerebral cortex, brain stem, spinal cord and peripheral nerves. Usually the term ""evoked potential"" is reserved for responses involving either recording from, or stimulation of, central nervous system structures. Thus evoked compound motor action potentials (CMAP) or sensory nerve action potentials (SNAP) as used in nerve conduction studies (NCS) are generally not thought of as evoked potentials, though they do meet the above definition.
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