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Control of Movement
Control of Movement

... The neuromuscular junction is the synapse formed between an alpha motor neuron axon and a muscle fiber ...
High-Resolution Labeling and Functional Manipulation of Specific
High-Resolution Labeling and Functional Manipulation of Specific

... Because different cell types often display distinct gene expression profiles [8–10], transcriptional promoters provide genetic access to visualize and manipulate different cell types. Gene knockin and transgenesis using bacterial artificial chromosomes (BAC; [11]) are two useful techniques to introd ...
Neurobiology of Addiction - The University of Sydney
Neurobiology of Addiction - The University of Sydney

... • A 35 year old man comes into your practice. He states that he has been from drug-to-drug and asks you, “Dr, do I have a disease?” • What do you tell the patient? – Addiction is considered to be a brain disease in that drug exposure has likely induced some brain changes. Your brain is now in a stat ...
Outline15 Spinal Cord
Outline15 Spinal Cord

... 7. What type of information is carried by the dorsal (posterior) roots of spinal nerves? What type of information is carried by the ventral (anterior) roots of spinal nerves? 8. What effectors are innervated by somatic motor neurons? What effectors are innervated by autonomic motor neurons? 9. What ...
PowerPoint to accompany Hole`s Human Anatomy and Physiology
PowerPoint to accompany Hole`s Human Anatomy and Physiology

... • The electrolytes of greatest importance to cellular functions release sodium, potassium, calcium, magnesium, chloride, sulfate, phosphate, bicarbonate, and hydrogen ions • These ions are primarily obtained from foods, but some are from water and other beverages •Ordinarily, a person obtains suffic ...
Odorant Category Profile Selectivity of Olfactory Cortex Neurons
Odorant Category Profile Selectivity of Olfactory Cortex Neurons

... machi Kikai, Tokyo, Japan). Respiration was acids, lactones, and phenols. The eight categories examined in the present study are indicated by the columns with color. Note that continuously monitored by measuring the individual foods show distinct odorant-category profiles. The names of the odorants ...
Anterior nuclei
Anterior nuclei

... relayed to the reticular formation. The fibers of this tract mediate the exchange of autonomic information between the hypothalamus, cranial nerve nuclei, and spinal cord The mamillothalamic fasciculus connects to cingulate gyrus Hypothalamic - hypophyseal tract communicates with pituitary gland ...
PDF file
PDF file

... For example, in Fig. 3(b), the “young” object makes the pixels 2 and 4 bright and all other green pixels dark. However, such an image from the “young” object is not known during the programming time for the DP. In principle, the X area can model any sensory modality (e.g., vision, audition, and touc ...
Do distinct populations of dorsal root ganglion neurons account for
Do distinct populations of dorsal root ganglion neurons account for

... Male Sprague-Dawley rats (Ivanovas, Kisslegg, Germany) weighing 250 –300 g were maintained in cages at 24 ⫾ 2°C. They were fed a standard rat diet (no. C-1000, Altromin, Lage, Germany) containing 0.2% sodium by weight and were allowed free access to tap water. All procedures performed in animals wer ...
Two dimensional synaptically generated traveling waves in a theta
Two dimensional synaptically generated traveling waves in a theta

... where  is the phase variable, I(t) is the time dependent inputs and  is a bias parameter that controls the excitability of the cell. If I#(0, there is a stable rest state. If I#'0 the neuron "res at a rate /(I#. The di!erent regimes for the -neuron are represented in Fig. 1a. A solitary spike ...
Textures of Natural Images in the Human Brain. Focus on
Textures of Natural Images in the Human Brain. Focus on

... from their background. Despite the ease with which we perceive the two zebras in a background of black and white stripes this is a challenging operation for the visual system. The edges that separate the two zebras from each other and their background divide the image in homogeneous regions that dif ...
Non-NMDA and NMDA receptors transmit area postrema input to
Non-NMDA and NMDA receptors transmit area postrema input to

... AP and baroreceptor inputs (5). Facilitative interactions at NTS synapses have also been demonstrated for AP and vagal afferent inputs (5) in the intact rabbit and for AP and solitary tract inputs in a rabbit brain stem slice (18). One important step in delineating the nature of AP modulation of bar ...
Spinal cord- 2 - Weebly
Spinal cord- 2 - Weebly

... pyramidal decussation, where they continue to descend in the lateral funiculus of the spinal cord as the lateral corticospinal tract (LCST). The tract descends all the way of spinal cord with fibers continually leaving it in order to synapse on interneurons in the anterior gray horn. ( Some even sy ...
AP150 PATHWAYS ASSIGNMENT
AP150 PATHWAYS ASSIGNMENT

... An action potential begins on a ___UPPER MOTOR_ neurons that leaves the __FRONTAL__ lobe of the brain and passes through the ____CEREBRAL PENDUNCLES__ of the midbrain and then the __PYRAMIDS__ of the medulla oblongata where it then decussates and travels down a __ANTERIOR OR LATTERAL __ column to th ...
Neural and Voluntary Control of Breathing
Neural and Voluntary Control of Breathing

... breathing / location for two nuclei that send impulses to diaphragm via phrenic nerves and external intercostal muscles via the intercostal nerves – Ventral respiratory group – location of the preBotzinger complex // generates the rhythm of breathing by sending action potentials to the DRG’s inspira ...
Physiology Student Objectives Enduring understanding 2.C
Physiology Student Objectives Enduring understanding 2.C

... Essential knowledge 3.D.1: Cell communication processes share common features that reflect a shared evolutionary history. a. Communication involves transduction of stimulatory or inhibitory signals from other cells, organisms or the environment. b. Correct and appropriate signal transduction processe ...
14. Assessment of the nervous system
14. Assessment of the nervous system

... different physiological processes. That means that nervous system unites, integrates and subordinates all the parts of human body and provides its connection with environment ...
Luczak, 2015 - University of Lethbridge
Luczak, 2015 - University of Lethbridge

... two different tactile stimuli applied to the palm or a digit of the contralateral forelimb are shown. Together with those of other studies35,48, these findings indicate that somatosensory neurons also show stereotypical sequential order at stimulus onset. d | In the olfactory bulb, neuronal populati ...
How Drugs Work in the Body and on the Mind
How Drugs Work in the Body and on the Mind

... © Copyright 2011, Pearson Education, Inc. All rights reserved. ...
Reelin and apolipoprotein E receptor 2 in the embryonic and mature
Reelin and apolipoprotein E receptor 2 in the embryonic and mature

... translocation is most evident in the initial stage of cortical development, when the cortex is thin, and at the stage when neurons approach their final position in the CP. The principal component of a focal adhesion is a cellsurface receptor (the integrin) with an intracellular domain bound to the c ...
Slide 1
Slide 1

... • major mechanism involved in exchange of solutes is diffusion • substances move in and out along the length of the capillaries according to their respective concentration gradients • Fluid movement in systemic capillaries is determined by two major factors 1. hydrostatic pressure; varies along port ...
Tissue Webquest
Tissue Webquest

... Muscle cells possess other attributes besides contractility. All muscles are excitable, able to respond to stimuli, an important capability also common to nervous tissues. Muscles are extensible in that they can be stretched and still maintain contractile ability. As we will see, some muscles are be ...
Slide 1
Slide 1

... • BUT processes probably combine in a nonadditive/interactive fashion ...
Alcohol and error processing
Alcohol and error processing

... (ERN), a negative deflection in the electroencephalogram associated with error commission. Here, we explore possible mechanisms underlying this result in the context of two recent theories about the neural system that produces the ERN – one based on principles of reinforcement learning and the other ...
Mechanisms underlying working memory for novel information
Mechanisms underlying working memory for novel information

... underlie working memory [11–13,57] and encoding into episodic memory [24,25,56]. Working memory Biophysical compartmental simulations of layer II non-stellate neurons [13] demonstrate how the Alonso current can underlie the sustained delay period spiking in the entorhinal cortex seen with extracellu ...
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Stimulus (physiology)



In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction. These sensory receptors can receive information from outside the body, as in touch receptors found in the skin or light receptors in the eye, as well as from inside the body, as in chemoreceptors and mechanorceptors. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response. In order for a stimulus to be detected with high probability, its level must exceed the absolute threshold; if a signal does reach threshold, the information is transmitted to the central nervous system (CNS), where it is integrated and a decision on how to react is made. Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.
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