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| | Expanding the Neurological Examination |
 | | The segmental pathways are sensory pathways that are either of somatic or visceral origin and arise from a variety of sensory receptors in skin, joints, fasciae, viscera, and from various chemoreceptors. | | | By these sensory receptor challenges, the neurological pathways related to a specific patient’s pain may be assessed and the most appropriate pain control techniques may be employed. | | | Similarly, although characteristics of individual neurological receptors and pathways are emphasized herein, the clinician must consider all of the interconnectedness of the nervous system, which is also within the realm of AK assessment but beyond the scope of this presentation. |
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http://www.icakusa.com/akmodel.html
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| | SENSORY PHYSIOLOGY |
| | Receptor potentials then initiate action potentials (nerve impulses) which are carried by sensory nerve fibers into the spinal cord and, in some cases, up through the spinal cord to the brain. | | | We can further see how sensory information is "mapped" onto the sensory cortex of the brain by looking at a "sensory homunculus." The sensory homunculus show the proportion of the sensory cortex dedicated to interpreting sensory information from various areas of the body. | | | The only way to correctly interpret sensations is to send the action potentials from a sensory receptor to the correct location for integration and interpretation of that sensory information in the spinal cord, brain stem, thalamus, and sensory cortex. |
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http://faculty.etsu.edu/currie/study/sensory.htm
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| | OVERVIEW |
| | In addition to receiving sensory information from the external world, we also receive it from receptors located internally where it is used control heart rate, blood pressure, respiration, and reflex and involuntary movement (these will be covered in another part of the course). | | | Receptors perform a sensory transduction, changing physical energy into electrical energy of the nervous system in the form of all-or-none action potentials in peripheral afferent nerve fibers. | | | The end result of integrative action of sensory input is the perception or conscious experience of sensation and the appropriate motor response. |
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http://www.neurophys.wisc.edu/~ychen/textbase/ov.html
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| | SENSORY SYSTEMS |
| | Secondary sensory neurons cross over the midline at the level of the spinal cord and ascend to the brain in the anterolateral pathway which is along the anterior and lateral portion of the spinal cord. | | | Unlike the neurons in the dorsal column pathway the majority of primary sensory neurons in this pathway synapse with secondary sensory neurons located in the spinal cord in the substantia gelatinosa (the uppermost layers of the dorsal horn). | | | The area of skin that a sensory neuron innervates is the receptive field for that particular neuron. |
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http://www.bioweb.uncc.edu/humanphys/sensory.htm
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| | P399senses |
| | Generally, the receptor fields of spinal and thalamic neurons responsive to pain are large. | | | In pain studies, this effect is modulated (for example, by naloxone, which competitively blocks mu receptors for opiates) as though it involved the same spinal pathways as pain. | | | The free nerve endings of sensory neurons seem to transduce most external energy that we sense as pain. |
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http://socrates.berkeley.edu/~alanburr/neurobio/Neuropages/P3senses.htm
(2902 words)
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| | [No title] |
| | Stimuli from the environment convey information to processing circuits within the brain and spinal cord which in turn interpret their significance and send signals to peripheral effectors that move the body or adjust the workings of its internal organs. | | | Estimates made by a human subject of the magnitude of sensation produced by pressure on the hand increase linearly as a function of skin indentation. | | | The relationship between sensory systems and other parts of the brain. |
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http://www.bme.jhu.edu/~reza/Courses/physfound_files/xwang_1notes.doc
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| | [No title] |
| | Receptors respond most readily to one form of stimulation, and less readily or not at all, to others. | | | EXTEROCEPTORS receive inputs from outside of the body; INTEROCEPTORS monitor the internal conditions in the body; PROPRIOCEPTORS are mechanoreceptors which sense movement and relative position of the body parts, and orientation of the body. | | | All sensory pathways give off many branches (collaterals) before reaching the thalamus. |
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http://isis.uwimona.edu.jm/fpas/courses/physiology/neurophysiology/SensoryIntroduction.htm
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| | BME 7610 - PHYSIOLOGY OF PAIN |
| | In sensory pathways neurons from the thalamus project to specific primary sensory areas of the cerebral cortex. | | | Virtually all pathways transmitting sensory information to the cerebral cortex of the brain make connections to the thalamus. | | | The portions of the body in the peripheral nervous system are projected to the brain as sensory maps. |
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http://ttb.eng.wayne.edu/~cavanau/chap2324.html
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| | Basic Sensory Receptor Physiology |
| | The first part on the sensory neuron that does have the voltage-gated Na channels required for action potential generation is the 1 | | | The tip of the sensory neuron, however, is like the dendritic zone of a neuron in that it lacks voltage-gated Na channels and therefore cannot generate or propagate action potentials, so you can think of this depolarization as a large-amplitude EPSP (dV | | | Pacinian Corpuscles are examples of what we call mechanoreceptors because what they respond to is pressure applied to the skin's surface. |
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http://www.unm.edu/~toolson/Receptor_Function_Handout.html
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| | Chapter 9 notes |
| | No. Sensory nerves usually respond best to one particular form of stimulus energy, but other stimuli can also evoke a response. | | | The idea that each sensory nerve carries information about one particular subjective sensation. | | | Does the "law of specific nerve energies" arise because each sensory nerve only responsds to one type of stimulus energy? |
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http://soma.npa.uiuc.edu/courses/bio303/Chapter9_answers.htm
(703 words)
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| | Sensory Reception |
| | These neuromasts are located throughout the skin, in channels beneath the scales of the main body, and in the dermal bones of the head. | | | Rods are more sensitive to light than cones, which is why they work better in dim light. | | | The sensory organs provide the only means of communication from the environment to the nervous system. |
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http://www.cartage.org.lb/en/themes/Sciences/Zoology/AnimalPhysiology/SensoryReception/SensoryReception.htm
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| | Sensory Physiology |
| | Reflex arc example: the muscle spindle stretch reflex. | | | Crossed-Extensor Reflex: automatic activation of muscles in opposite leg to maintain balance. | | | The sensory information generally travels to the cerebral cortex of the brain. |
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http://eee.uci.edu/clients/dgromis/muscles/sensoryphysiology.htm
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| | Sensory Receptor or Chemical Synaptic Potentials |
| | For example, pain can open sensory-gated Na channels on the dendrites of neurons that relay signals about pain. | | | In sensory nerves, the cell body is deflected off to the side of the axon and the cell bodies of many of our sensory nerves are concentrated in the dorsal root ganglia of the spinal cord. | | | Sensory perception begins with the stimulation of modified nerve endings (sensory receptors or sensory corpuscles) which relay information about sensory stimuli to the dendrites of our sensory relay nerves (first order sensory nerves). |
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http://faculty.etsu.edu/currie/sensorychem.htm
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| | Sensory Transduction - Sinauer Associates, Inc. |
| | The central claim, and it is a remarkable one, is that we know in outline how sensation occurs in all the major senses of the body and that this is one of the great achievements of physiology and neuroscience in the twentieth century…. | | | This process, called sensory transduction, began to be understood only recently, as a result of the development of the techniques of patch-clamp recording and gene cloning. | | | This protein then changes conformation, either directly producing an electrical signal (as for touch receptors in the skin or for hair cells in the ear and vestibular system) or triggering an enzymatic cascade and a change in the concentration of an intracellular second messenger that generates the electrical response (as in the eye and nose). |
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http://www.sinauer.com/detail.php?id=1716
(685 words)
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| | Sensory Receptor Neurons |
| | The process of phototransduction takes place in the retinal photoreceptors | | | Sensory cells provide clear examples of the principles of ion channel diversity and modulation |
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http://www.lifesci.rutgers.edu/~mplummer/lab/rldlec6/index.htm
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| | [No title] |
| | Furthermore, the nucleic acids and the polypeptides they encode can be used as probes to elucidate olfactant-or tastant- induced behaviors. | | | Hybrid protein-coding sequences comprising nucleic acids sensory receptors fused to the translocation sequences described herein may be constructed. | | | To analyze ligand-receptor interactions and their effects on cell signaling and the processing of those signals in sensory perception, specific sensants and their cognate receptor complexes are detected, identified, and measured under binding conditions. |
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http://www.wipo.int/cgi-pct/guest/getbykey5?KEY=01/98526.011227&ELEMENT_SET=DECL
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| | Olfactory receptor neuron - Wikipedia, the free encyclopedia |
| | Most neurons in other parts of the nervous system cannot be replaced, so research focusing on how stem cells differentiate into olfactory sensory neurons could lead to the use of these stem cells to replace damaged or degenerated neurons in the brain, spinal cord, or other parts of the nervous system. | | | Much like in vertebrates, axons from the sensory neurons converge into glomeruli in the antennal lobe. | | | An olfactory receptor neuron, also called an olfactory sensory neuron, is the primary transduction cell for olfaction in the olfactory system. |
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http://en.wikipedia.org/wiki/Olfactory_receptor_neuron
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| | SENSORY RECEPTOR IN THE SKIN |
| | Translations for "SENSORY RECEPTOR IN THE SKIN"; alternative meanings/domain in parentheses. |
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http://www.websters-online-dictionary.org/definition/SENSORY+RECEPTOR+IN+THE+SKIN
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| | Sensory receptor - |
| | In a sensory system, a sensory receptor is a structure that recognizes a stimulus in the internal or external environment of an organism. | | | Other receptors such as mechanoreceptors and photoreceptors respond to physical stimuli. | | | The sensory receptor functions as the first component in a sensory system. |
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http://www.grohol.com/psypsych/Sensory_receptor
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| | Sensory Receptor Function |
| | Location - each receptor has a pathway to a specific part of the brain. | | | Stretch may occur by lengthening the entire muscle as a result of weight or antagonistic muscle contraction or shortening of only the spindle fibers (enhances sensitivity) | | | Central part is wrapped by type Ia sensory fibers and the ends innervated by type II sensory fibers, both sensory fibers increase their output when the spindle is stretched, type Ia by the rate and amount of stretch, type II by the degree of stretch based on muscle tone. |
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http://www.mtsu.edu/~jshardo/bly2010/nervous/receptor.html
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| | Penn State Faculty Research Expertise Database (FRED) |
| | Included are receptors for stimuli outside the body (exteroceptors) as well as receptors for stimuli from within the body itself (interoceptors and proprioceptors). | | | Sensory receptors may include accessory structures which condition (e.g., filter) the input received by the receptor neurons themselves. | | | Specialized neurons or parts of neurons which transduce sensory information and relay it centrally. |
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http://fred.hmc.psu.edu/ds/retrieve/fred/meshdescriptor/D011984
(71 words)
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| | Untitled Document |
| | Sensory receptor: A cell, tissue, or organ of the PNS that receives internal or external stimuli and responds by initiating a nerve impulse toward the CNS. |
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http://www.vet.purdue.edu/word_search/glossary/sensory_receptor.htm
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| | Biology 132 Handout Chapter 41 |
| | A receptor potential that spreads to this region is called a generator potential because it generates action potentials by causing voltage-gated Na channels to open. | | | There are lots of different types of sensory receptors - chem, mechano, photo, temperature, infrared, electro, magneto, and pain — each of these "feelings" is a sensory modality. | | | Detection of the filtered info: Stimulation of a sensory receptor membrane by the appropriate sensory modality transiently changes the membrane permeability and ionic conductance. |
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http://www.sewanee.edu/biology/berner/Biology132/handouts/chapter41.html
(630 words)
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| | AIRWAY TRANSEPITHELIAL IONIC CURRENTS AFTER STIMULATION OF SENSORY RECEPTORS |
| | The phenomenon of hyperpolarization of airway after gentle mechanical stimulation (1, 2, 3, 4) was explined as opening of ionic channels of epithelial cels stimulated by "sensory" neuropeptides which were liberated from C-fiber endings ("cough receptors") by gentle mechanical stimuli. | | | The aim of the study was to gain evidences of involvement of intrawall neutral element in the hyperpolarization reaction and it was done by recording of hyperpolarization in the place of stimulation and also along the nearby airways. | | | Acknowledgenents: The study was supported by grant KBN, |
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http://www.lf2.cuni.cz/physiolres/feps/banach.htm
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| | MSN Encarta - Dictionary - thermoreceptor definition |
| | sensory receptor: a sensory receptor, usually a nerve ending in the skin, that is stimulated by heat or cold | | | Click here to search all of MSN Encarta |
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http://ca.encarta.msn.com/dictionary_1861719653/thermoreceptor.html
(57 words)
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| | North Jersey Media Group providing local news, sports & classifieds for Northern New Jersey! |
| | Chemicals in the brain interpret that impulse and index it and direct it to another brain cell and from that cell to another, and so forth. | | | In fact, it's not the memory that's failing - the failure is in the focus when making the memory. | | | Sensory memory: This is the memory most folks take for granted - knowing how to navigate your environment. |
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http://www.northjersey.com/page.php?qstr=eXJpcnk3ZjczN2Y3dnFlZUVFeXk4NSZmZ2JlbDdmN3ZxZWVFRXl5NjY3NDM0NyZ5cmlyeTdmNzE3Zjd2cWVlRUV5eTU=
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| | Color Discrimination in Halobacteria: Spectroscopic Characterization of a Second Sensory Receptor Covering the ... |
| | The archaeobacterium H. halobium thus uses two different mechanisms for color discrimination; it uses two rhodopsin-like receptors with different spectral sensitivities and also the photochromicity of at least one of these receptors to distinguish between three regions covering the visible and near-UV spectrum. | | | Color Discrimination in Halobacteria: Spectroscopic Characterization of a Second Sensory Receptor Covering the Blue-Green Region of the Spectrum -- Wolff et al. | | | , has been identified as the receptor for the long-wavelength and near-UV stimuli. |
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http://www.pnas.org/cgi/content/abstract/83/19/7272
(339 words)
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| | Sensory receptor formation in flies |
| | GOF, see change into mechano/chemo sensory (decrease chordotonal) | | | LOF, see change into chrodotonal (fewer mechano-chemosensory receptors) | | | Atonal gene expression-- GOF see more chordotonal sensory receptors |
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http://www.lsc.psu.edu/devbiol/HTML%20Presentation%20folder%2021/tsld009.htm
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| | Information on sensory receptor |
| | sensory receptor n : an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation [syn: sense organ, receptor] [ant: effector] | | | [ W E B K N O W L E D G E O N L I N E :: sensory receptor ] |
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http://www.wkonline.com/d/sensory_receptor.html
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| | Sensory Receptor formation in Drosophila |
| | Numb gene-- cytoplasmic localization, needed to form sensory neuron/sheath cell | | | Two cell divisions, lead to formation of 4 types of cells (hair, socket, sheath (glial), and neuron) | | | Notch gene-- needed to form a neuron vs. a sheath cell |
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http://www.lsc.psu.edu/devbiol/HTML%20Presentation%20folder%2021/sld010.htm
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