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Neurophysiology

~400 answered questions
Parent Category: Neuroscience
A branch of neuroscience that studies the physiology of the nervous system. From the Greek words nerve and nature, this science looks at the way that nerves function.
in one direction because one ribosome cant go one way and another the other way or our proteins would be messed up
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An impulse travels from one nerve to another by release & subsequent diffusion of chemicals called neurotransmitters across a very small gap between neurons, called a synapse. How neurotransmitters are released: As an impulse reaches an end of a neuron (the axon terminal), the impulse opens ion…
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you would have to be a high level thinker
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The processes pertaining to the functions of the nervous system of an organism. http://www.genomeknowledge.org/cgi-bin/eventbrowser?DB=gk_current&FOCUS_SPECIES=Homo%20sapiens&ID=160046&
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A neuron is at rest when theinside is negatively chraged compared to the outside.
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Answer When some one is brain-dead, their circulatory and resiratory functions are still active, but the brain is inactive. Cardiac Death- the heart is stopped- no blood circulates, youu get buried.
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I have been recently diagnosed with CIDP. I have refused flu shots for the past 10 years because when I would get them I would get sick from the shot then violently ill from the flu later on. I would advise anyone who gets very ill from flu shots be checked by a neurologist for CIDP, indications of …
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Answer There are many kinds of synapses in the nervous system, but I assume you're talking about the most commonly discussed type: the chemical synapse. These synapses join nerve cells (called neurons) and allow them to communicate. Communication across a chemical synapse is called synaptic tran…
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cochlea *scala vestibuli* and the round window is directly connected to the scala tympani (where sound dissipates) "The scala vestibuli is continuous with the vestibule near the base of the cochlea, where it abuts the oval window." From: Human Anatomy, 5th Edition Marieb, Mallatt, and Wilhelm
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The Basal ganglia are the group of Nuclei in the brains of vertebrates. These are located at the base of your fore brain. Basal Ganglia are also connected strongly with thalamas, the cerebral cortex, and other such areas.
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A common mistake in a clinical trial is failure to carefully examine the literature for similar, prior research. Also failure to critically assess the prior literature. Another mistake is failure to specify the inclusion and exclusion criteria for your subjects.
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ACh effects are terminated by an enzymatic breakdown in the synaptic cleff by acetylcholinesterase.
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The axon is a very long extension of the neuron. The way in which an electrical current can pass involves the inside and outside of the cell membrane. Action potentials The stage is set with potassium and sodium cations, which all repel one another. The cations would have been in equilibrium, but pu…
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Hertz(Hz)
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No single ion in and of itself is responsible for firing an action potential. Instead, 4 total ions are important when talking about excitable cells in general. These include sodium, potassium, calcium, and to a very small extent, chlorine. (chlorine has a role in excitable cells while they are at …
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By a change in polarity as sodium ions enter the cell and potassium ions exit the cell, forming a wave of depolarization that travels along the axon until it reaches the axon terminal releases the neurotransmitters into the synaptic gap. By an action potential, which is a depolarization of the nerv…
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To "connect" two neurons, (or a neuron and a muscle cell), by providing a space between an axon terminal of one neuron and a dendrite of another neuron (or a muscle cell), so neurotransmitters that are released by an axon terminal can diffuse across that space to reach the dendrite (or muscle cell) …
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An impulse begins when a neuron is stimulated by another neuron or by the environment.
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You start with 46 chromosomes in your body. 23 from your dad and 23 from your mom. You end with two new daughter cells with their own nuclei. I think you spelled chromosome wrong. and mitosis wrong. so, you start with 46 chromosomes in your body. 23 from your mom and 23 from your dad. Then,at the e…
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The SI unit for frequency is the Hertz. It is abbreviated as Hz and is defined as one cycle per second.The unit is Hertz (Hz) and is defined as the number of cycles per second.Frequency is measured in Cyles per Second which also has the official name of HERTZThe basic unit is the hertz which means c…
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Calcium ions cause vesicles containing neurotransmitters to fuse with the cell membrane, thus RELEASING the neurotransmitters into the synaptic cleft.The vesicles in the axon terminal are like little water balloons, with a "skin" like the cell membrane. The Calcium ions have entered the axon termina…
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I believe Doleo would be the verb (doleo dolere), the word for pain ie a pain (noun) is dolor, doloris (masc)
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It is the firing of a nerve which sends an electrical signal down the axons of that nerve. The message propagates by the movement of Sodium (Na) and Potassium (K) ions in and out of the axon wall/sheath. The electrical messages, called nerve impulses, may travel as fast as 150m per sec or as slow a…
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the endocrine and the nervous systems work together to maintain homeostasis
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The circle of Willis is a circle of arteries which supply blood to the brain and surrounding structures.
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Genetic engineering cannot be called yet an exact science, malformation and mutations inadequate to sustain normal life can be created.
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The exact ones are not known for certain at this time. Some evidence indicates serotonin, dopamine, and norepinephrine may contribute.
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Sound. Sound is the vibration or movement of the air. The ear is sensitive to a range of approximately 3 and 12 kHz (a tone can be measured as a sine wave). The change in pressure deforms the tympanic membrane which in turn activates frequency-coded neurons to fire.
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Synapses are the connections between nerve cells. They transmit information from one nerve cell to the next. However, all nerve cells receive and make many synapses, so what the nerve cell actually does with the incoming signals can be quite complicated.
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Symmetrical balance is when everything is perfectly and evenly balanced out. Asymmetrical balance refers to a design that has dissimilar elements but still appears balanced, dividing a picture in half won't have the exact same elements however the elements they do have are varied and seem to balance…
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Infinite Intelligence: A nonreligious / more scientific name for what the religious would deem to be God. An all powerful and invisible (to the naked eye) energy source that exists everywhere in the Universe -responsible for the creation of and existence of: everything / existence itself. Infinite …
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At the neuromuscular junction (or presynaptic end) of the sarcolemma, it is referred to as end plate synapse potential.
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Burning pain is legs are common because of continuous workout after a long time. This burning sensation is often at the top part of your thigh . This pain could sometimes be unbearable and the most easiest and likely to relieve the pain is by keeping an ice pack. or running absolutely hot water on…
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The Circle of Willis is a circle of arteries that provides main blood supply to the brain and the surrounding structures. It is important as prevents ischemia(shortage of blood to tissues) thus preserving cerebral perfusion when one or more artery in the brain is blocked due to throbosis or embolis…
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Comprised of the brain and spinal cord The nervous system is the key to homeostasis. The nerves are what keep your body in proper working order and all of those nerves stem from your brain through your spinal cord to reach its destination, then the nerves return to the brain the same way. Therefore,…
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When an action potential reaches the end of a neuron, it triggers the release of neuotransmitters such as epinephrine (sympathetic) or achetylcholine (parasympathetic).
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It doesn't, it causes the opposite: a depolarisation block, which is why is used as a muscle relaxant in some circumstances. It may be that your recording electrodes were near a cell where curare had not yet diffused to. Or it may be related to disinhibition from blocking interneurons that express n…
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This occurs due to temporary lack of blood flow, most often due to pressure on the arm - such as while sleeping. The "pins and needles" sensation produces awakening (or lightening of sleep) such that positional changes are made in order to return blood flow to that part of the arm and shoulder.
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Hirakud Dam in Orrisa
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Action potentials are generated on a part of the neuron called the 'axon hillock' - the proximal most portion of the axon.
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The olfactory bulb is a small , match-head sized organ in the top of the nasal cavity,and is connected to hundreds of olfactory hairs, or cilia, which lie in a layer of mucous. These have receptor sites, and it is still not well understood how these work, but one theory is that the shape of the mole…
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By a release & subsequent diffusion of chemicals called neurotransmitters across a very small gap between neurons, called a synapse. How neurotransmitters are released:As an impulse reaches an end of a neuron, called an axon terminal, the impulse opens ion pores in that axon terminal which allo…
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Schwann cells are neuroglial cells that actually cover and insulate axons. They not only help to spend up nerve transmission, but they also feed the neuron.
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The myelin sheath cover the axon.
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Cephalic means the head. The appendages for eating includes the mandibles and two pairs of maxillae. There are also three pairs of maxillipeds that move food towards the mouth.
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Hertz (Hz)
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The sarcolemma is the capsule of fibrous tissue contianing striated muscles.
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Myelin sheath and nodes
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I had Viral Neuritis of the upper plaxia (Plaxia may be spelled wrong) but is of the shoulder plate. I had burning pain in my shoulder and all the way down my arm. It can last for a year or more. It is caused due to a viral infection in the bone itself. there are many nerve ending in the bone and th…
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The nervous system is what activates hormones in the endocrine system
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The part of the neuron that carries impulses towards the cell body is called the dendrite.
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Both potassium and sodium ions can "leak" through the cell membrane due to diffusion.
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the inside of the membrane temporarily becomes more positive than the outside,reversing the resting potential
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the fuction of the cricle of willis is to supply blood to the brain.
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cerebrum,cerebellum,medulla
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There hasn't been any respectable linkage between heavy marijuana use and brain damage.
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Nerve impulses are signals carried along nerve fibers. These signals convey, to the spinal cord and brain, information about the body and about the outside world. They communicate among centers in the central nervous system and they command your muscles to move. Nerve impulses are electrochemical ev…
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To support the functioning of neurons. They regulate immediate neuron(s) chemical environment and are involved with blood flow in the brain and to neurons.
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ST - In regards to excitable cell (i.e. neurons) the minimum mV need to trigger a AP (action potential) and is around -40mV (although this may vary depending on the cell). In additional to this; excitable cells (i.e. neurons) shows an all-or-nothing property, such that if the stimulus threshold is …
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It mean like you are very nervous and you body just cant handle it. It also is why people stutter they make actions to this word.Hoped that helped u
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Irregular transverse thickenings of the sarcolemma connect cardiac muscle fibers to neighboring muscle fibers. The gap junctions that occur with irregular transverse thickening of the sarcolemma allow the myocardium to contract as a single unit.
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This means that when your muscles stretch certain ways that the nerves are being pressed against and can't move causing severe pain down the lining of the muscles being used. Flexion is used when the toes are pointed causing the muscles in the back of the leg to pull, and extension is when you exten…
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transmitted
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Although its main aim is to supply vital proteins to the cell, its FUNCTION is to convey cortical efferents and afferents. Source: http://www.sylvius.com/ search in "main" for corona radiata and you will get the answer as cited above
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In simplest terms, the five stages of action potential are... A. Action Potential B. Depolarization C. Recovery Phase D. Refractory PeriodE. Hyper-polarization
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§Labor and management§Productivity§Wage levels§Training needs§Local infrastructure Measuring site potential in step 3 involves determining whether a site can supply adequate resources needed to carry out the proposed business activity. Key issues include:•For many companies the most important…
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A "synape" is a misspelled synapse.
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A motor neuron and all of the skeletal muscle cells it stimulates is called a motor unit.
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It's a reflex action. It's automatic, inborn/genetic, and done without thinking.
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Your neurons are adapted in such a way that impulses move only in one direction.
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well, 1. the membrane starts in its resting state-POLARISED! with the inside of the cell being -60mV compared to the outside. 2. the membrane DEPOLARISES! 3. POTASSIUM IONS DIFFUSE OUT OF THE CELL BRINGING THE P.D BACK TO NEGATIVE INSIDE COMPARED WITH THE OUTSIDE!!!!!!!!!!!-VERY IMPORTANT-RE-POLARIS…
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The endocrine system is a system of glands that secrete hormones. This includes the thyroid gland, pituitary gland, adrenal glands, parathyroid glands, and those trying to manage conditions like diabetes to name a few.
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A synaptic potential exists at the INPUT of a neuron (dendrite), and an action potential occurs at the OUTPUT of a neuron (axon). (from OldGuy) (from Ilantoren:)  A synaptic potential is the result of many excitatory post synaptic potentials (epsp) each one caused by the synaptic vesicles re…
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1. A neurotransmitter (NT) released from another cell (or in some cases the same cell) will diffuse across the synaptic cleft and bind to a recipient receptor. 2. The receptor will then change it's permeability to certain ions in the extracellular fluid, allowing the ions to flux into the cell (the…
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Continuous theory of matter says that matter comes in long continuous sheets,it never breaks while the discontinuous theory of matter assumes that matter comes in smaller packets and the reason why matter looks continuous is because we can't magnify it enough to see the small packets of matter. Con…
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If it is sufficiently depolarized it will fire an action potential A depolarized neuron will successfully pass a message. If you have a polarized neuron will not be able to feel a burn, etc.
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Generally speaking the neuron is becoming depolarized, but to be more specific Phases of Action Potential:1. Resting Potential: Vm = -65mV2. Rising Phase: Vm = 40mV; Rapid depolarization of the membrane.3. Overshoot: When the inside of the neuron is positively charged with respect to the outside …
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It effects all of it by causing increased oxygen flow to both sides at the same time rather than one side at a time.
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I believe it is the thalamus.
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Through magnetic wavelegnths in octaves that generate a sensation through the ocular motor neuron.
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From the receptors to bipolar cells, then to ganglionic cells still in the retina. These then project into the optic nerves (cranial nerve II). The optic nerves then partially cross over at the optic chiasm, before reaching the thalamus, where signal processing begins. From the thalamus the optic tr…
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By only being conducted in one direction, action potentials allow for fast, direct communication between brain and the peripheral tissues. A good analogy for the one-way function of action potentials is the idea of a one way street. When a car drives the wrong way on a one-way street, the normal dr…
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When muscle cells are stimulated, they contract and exert a force in one direction. Stimulation of muscle cells is caused by nerve impulses carried from the central nervous system to the muscles. When the nerve impulse reaches the end of the neuron, it causes a transfer of the action potential in m…
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Not all the electrical signalling in the nervoussystem is by way of action potentials, or impulses.Indeed it could be argued that some of the mostimportant, if not the most important, of the centralnervous system's communications depend uponnon-impulse signalling. These signals, which are atleast on…
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According to Urban Dictionary, Orgism refers to the creation of a parallel universe.
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When pyruvic acid is converted into lactic acid, the process is called anaerobic synthesis. This process occurs during strenuous exercise.
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Approximately 25 years of age
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The relative refractory period is the time during which the generation of an action potential is impossible no matter the strength of the stimulus
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Nerve root outlet of the spinal cord, most often between L4-L5 or L5-S1.
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