How Itching Works and Why Scratching an Itch Feels Good

How Itching Works and Why Scratching an Itch Feels Good Humans and other animals itch for a variety of reasons. Scientists believe the underlying purpose of the annoying sensation (called pruritus) is so we can remove parasites and irritants and protect our skin. However, other things can lead to itching, including drugs, diseases, and even a psychosomatic response. How Itching Works While drugs and disease typically stimulate itching because of a chemical response, most of the time the sensation is a result of skin irritation. Whether the irritation starts from dry skin, a parasite, an insect bite, or chemical exposure, the itch-sensing nerve fibers (called pruriceptors) become activated. Chemicals that activate the fibers may be histamine from inflammation, opioids, endorphins, or the neurotransmitters acetylcholine and serotonin. These nerve cells are a special type of C-fiber, structurally like the C-fibers that transmit pain, except they send a different signal. Only about 5% of C-fibers are pruriceptors. When stimulated, pruriceptor neurons fire a signal to the spinal cord and the brain, which stimulates a rubbing or scratching reflex. In contrast, the response to the signal from pain receptors is an avoidance reflex. Scratching or rubbing an itch stops the signal by stimulating pain receptors and touch receptors in the same region. Drugs and Diseases That Make You Itch Since the nerve fibers for itching are in the skin, it makes sense most itching starts there. Psoriasis, shingles, ringworm, and chicken pox are conditions or infections that affect the skin. However, some drugs and illnesses can cause itching without underlying skin irritation. The antimalarial drug chloroquine is known to cause severe itching as a common side effect. Morphine is another drug known to cause itching. Chronic itching can result from multiple sclerosis, certain cancers, and liver disease. The ingredient that makes peppers hot, capsaicin, can cause itching as well as pain. Why Scratching an Itch Feels Good (But Isnt) The most satisfying relief for an itch is to scratch it. When you scratch, neurons fire pain signals to your brain, which temporarily overrides the itching sensation. The feel-good neurotransmitter serotonin is released to provide relief from the pain. Essentially, your brain rewards you for scratching. However, a study conducted at Washington University School of Medicine in St. Louis indicates scratching ultimately intensifies the itch because serotonin binds 5HT1A receptors in the spinal cord that activate GRPR neurons that stimulate more itchiness. Blocking serotonin isnt a good solution for people suffering chronic itching because the molecule is also responsible for growth, bone metabolism, and other key processes. How to Stop Itching So, scratching an itch, while pleasurable, is not a good way to stop itching. Getting relief depends on the cause of the pruritis. If the issue is skin irritation, it may help to cleanse the area with a gentle soap and apply an unscented lotion. If inflammation is present, an antihistamine (e.g., Benadryl), calamine, or hydrocortisone may help. Most pain relievers dont diminish itchiness, but opioid antagonists  offer relief to some people. Another option is to expose skin to sunlight or ultraviolet light (UV) therapy, apply a cold pack, or apply a few electrical zaps. If itching persists, its a good idea to see a doctor to check for underlying medical conditions or itching in response to a drug. If you absolutely cant resist the urge to scratch, try rubbing the area rather than scratching it. If all else fails, a German study indicates you can lessen itching by looking into a mirror and scratching the corresponding non-itching body part. Itching Is Contagious Are you getting itchy reading this article? If so, its a completely normal reaction. Itching, like yawning, is contagious. Doctors who treat itchy patients often find themselves scratching as well. Writing about itching leads to itchiness (trust me on this). Researchers have found people attending lectures on itching scratch themselves a lot more often than if they were learning about a different topic. There may be an evolutionary advantage to scratching when you see another person or animal do it. Its likely a good indicator you might want to check for biting insects, parasites, or irritating plants.

Fundamentals of Macroeconomics Paper Essays (862 words)

Fundamentals of Macroeconomics Paper Essays (862 words) Fundamentals of Macroeconomics Paper ECO /372 Sam Pirnazar July 6, 2015 Now a days we know that there are numerous issues that actually affect our economy, things such as gross domestic product (GDP), nominal GDP, real GDP, inflation rate, unemployment rates, and as well as interest rates. Now as we all know all of these area actually can have massive influences over how we purchase groceries, weather there will be a large amounts of layoffs to employees, and even decrease in taxes that year. What is Gross Domestic Products basically its the market value of services and goods that are produced in the country at any given time. Which this is usually considered an indication of the normal living situation within a country. However real GDP measures of the value of economic output that adjust for price changes. While Nominal GDP is a gross domestic product figure that has not been adjusted for inflation. In many way the unemployment rate are usually the measure of the frequency of unemployment and its calculated by dividing the number of people that are unemployed by the percentage of individuals that are actually working. While inflation rate is the percentage rate of change in price levels of over time, usually from one year to the next. Now let us also focus on the interest rate and the rate which interest is paid by a borrower for the use of money that they borrow from a lender. All of these factors are related to our everyday lives and how we manage our money, what we spend our money on, and when we spend our money from simple things like buying groceries, but when you are on a very tight budget as some of us have experienced it can be pretty stressful and of whelming when just last week you were able to buy strawberries and this month they price have went high and its just beyond your budget. You began to see how the cost of groceries affects the government because this is a good way that products are produced and sold within our country; which affects GDP, real GDP, and nominal GDP. Even though we know that this is directly related to consumers spending and in times of a recession consumers pull back on their spending and go into savings mode. When consumers go into savings mode this affect every type of business because production is down and this could cause layoffs. Even though buying groceries can affects households, because thousands of people stru ggle every day to provide for their families and when the cost of goods constantly goes up but wages don't this makes it really difficult to live and to provide for families. As we know massive layoffs affect people's standard of living and that is what the GDP is centered around; having to many layoffs can have a dramatic effect on the unemployment status which causes the economy to have a higher unemployment rate which causes salaries to go down so what their spending is down. Layoffs has a vicious cycle and globally in 2012, 200 million people were without employment and this shows the slowdown in employment growth. Companies were not hiring and people were not spending like they once was Layoffs affected the economy dramatically because it had a huge impact on consumer spending thing about it if no one is buying then production is down and that's how layoffs happen, and this affects households, businesses, and the government itself, personally its like a domino effect when one falls they all fall. Think about it tax decreases can stimulate economic growth because if people are paying less in taxes, and at the end they have more money to spend. It has been proven over the year after year that when taxes decreases it can generate economic growth and federal. If you think about it we all spend more during tax season, because we usually get a good return; since I file as a parent and full-time student with a disable child, qualify for various tax breaks. In so many ways tax decreases can help a business if their taxes are decreased the organization will payout less and have more income. As we compare

Personal and Personally

Personal and Personally Personal and Personally Personal and Personally By Maeve Maddox Among the most popular words in common discourse these days are personal and personally. A web search for personal brings up more than 900 million hits. Overused crazy, with 274 million, doesn’t come close. Bloggers and commenters use personal and personally with abandon: In my personal opinion, the reading comprehension section is the most difficult to study for and to succeed in. I personally don’t know why she went out with him in the first place. I personally find myself to be quite hilarious. This is just my own personal opinion so I am sorry if I offended you. Various businesses offer customers â€Å"personal diets,† â€Å"personal checks,† and â€Å"personal financial plans.† Experts of this and that encourage people to develop â€Å"personal strengths† and â€Å"personal styles.† So, when are the words personal and personally called for, and when are they redundant or incorrect? 1. Personally is used correctly when a person does something that ordinarily would be done by a minion: Eric Holder Personally Signed warrant to search James Rosen’s emails. Danny Zarka is first in line to collect his PS3 in Sydney, which was handed to him personally by Sonys local managing director. 2. Personally is redundant when used to modify an action that requires the presence of the person doing it: My son shook hands personally with Tony Danza. (The speaker’s son had to be present to shake hands.) 3. The expressions â€Å"my personal opinion† and â€Å"I personally think† are not only redundant, they weaken whatever statement they relate to and do nothing to mitigate the person’s responsibility for the opinion. Note: The only time â€Å"I personally† makes sense is when the speaker has acted in contradiction of his own views. For example, â€Å"I voted to permit drilling, but I personally believe that fracking causes dangerous earth disturbances.† 4. The phrase â€Å"my own personal opinion† piles redundancy upon redundancy. The adjective personal means â€Å"individual, private, one’s own.† The adjective own means â€Å"possessed or owned by the person or thing indicated by the preceding noun, pronoun, or possessive adjective.† It is sufficient to say â€Å"in my opinion.† 5. Personal is sometimes used where the word personalized would be more appropriate. A â€Å"personal trainer† makes sense. In the context of â€Å"personal trainer,† â€Å"personal assistant,† or â€Å"personal maid,† the personal designates an employee attached to someone in a close or exclusive subordinate capacity. In the case of â€Å"personal diets,† â€Å"personal checks,† and â€Å"personal financial plans,† however, the sense is that the diets, checks, and financial plans will be designed to meet individual requirements, hence personalized: â€Å"Identifiable as belonging to a particular person or organization, especially by being marked with a name or set of initials. Also: designed or produced to meet individual requirements; customized. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Expressions category, check our popular posts, or choose a related post below:36 Adjectives Describing LightUsing the Active Voice to Strengthen Your WritingLetter Writing 101

Discuss the impact of the National Curriculum on child-centred Essay

Discuss the impact of the National Curriculum on child-centred principles and the use of play within primary education - Essay Example It was evident that a single plan was needed. In 2000, it was reported by the National Institute of Economic and Social Research (NLT: Early Debate, 28.1.00) that English children were falling behind Japanese children because English children started school earlier and didn’t have sufficient development of behavioral and social skills. Teachers found they were spending more time on bad behavior and less time on teaching than did their Japanese equivalents. A study of play-based learning in Nursery School has shown it to be important for preschoolers, and this type of learning might be extended to children up to 6 years old and perhaps even 7 before formal teaching takes over. This thinking was first developed by Rudolph Steiner of Austria, whose Steiner Waldorf approach was instituted in Stuttgart, Germany, in 1919, with many Steiner early years centres presently located throughout the world. The centres focus on three stages - birth to 7 years old, 7 to 14 and 14 to 21. Gareth Lewis, author and advocate of home schoolin g (2001), lists the following principles as part of the approach: The Foundation Stage became part of the English National Curriculum in October 2002, and its profile has replaced baseline testing. Updated to the Early Years Foundation Stage in November 2005, it focuses on â€Å"the distinct needs of children aged three to the end of the reception year (age 5)† (NLT: Foundation Stage, par. 2). In the U.S. there was a move in 2003 to cut playtime in order to make more time for testing. This view was not shared in the United Kingdom, however, because researchers found that â€Å"shortening school breaks undermined children’s social relationships and long-term emotional development† (NLT: elgoals: Primary Play Cut for Testing, par. 2). Controversy surrounding this issue continued through 2004 and a report by the Qualifications and Curriculum Authority in

Crime and punishment Coursework Example | Topics and Well Written Essays - 2500 words

Crime and punishment - Coursework Example However, in a revocation hearing, guilt has been established so therefore some rights and rules of evidence are more relaxed. Even though the rights of a defendant in a criminal trial are more structured and strict than those of an offender whose probation is being revoked, the offender will always have the right to defend his or her position. In understanding the process to revoke probation, it must first and foremost be understood that without due process, probation cannot be revoked. This process is important in order to ensure that revocation is done for reasons that are valid and noteworthy and that the probation has been violated in such a way to warrant its revocation. Someone who has violated probation and will have it revoked will be afforded fewer rights than someone who has just been arrested. This does not mean they have no rights. The rights that they will be afforded is as follows: 1. Written notice of the violations before the revocation hearing 2. The right to see and hear the evidence against them. 3. The opportunity to be heard in person and to present witnesses and documentary evidence in their favor. 4. The right to confront and cross-examine the witnesses against them. 5. A hearing panel made up of neutral members. 6. A written statement by the hearing panel, including the evidence relied on and the reasons for revoking probation (Samaha 416). Revocation of probation is the result of having violated the terms of probation which may vary from person to person depending on the charges that have been levied against them. According to Sheb, there is a two step process in revoking probation on a federal charge as described in the Federal Rules of Criminal Procedure. The first step is a preliminary hearing which will allow the magistrate to assess whether or not there is probable cause to believe that a violation has occurred and that it is a just sanction to proceed with revoking the probation. The requirements for the preliminary hearing includ e the right to council for the defendant and that the proceeding be recorded by a court reporter. The defendant must be provided with written notice of the hearing which will include the violation with which the defendant is being charged. The defendant has the right to appear and to question any witness to his or her violation unless it is determined by the judge that the witness does not have to appear. At this point, the judge will determine whether the violation is valid and must go onto a revocation hearing, or if the charge is without validity and may be discharged (228). The next step is the revocation hearing. This hearing must be conducted within a reasonable time from the preliminary hearing and from the time of being taken into custody. This hearing can be waived by the defendant. The person is entitled to receive a written notice of this hearing, a list of evidence that is against them, notice of the right of council, and the right to make a statement and present any evi dence that pertains to their innocence or mitigating circumstance. At this hearing the formal revocation can be enacted (Sheb 229). While the rights for this procedure are more relaxed than the formalized rights for a trial, the defendant still has the right to defend his position. Some of the differences between a criminal trial and a probation revocation hearing is that in a criminal trial hearsay evidence cannot be presented. In a criminal trial evidence

Discuss the role of repetition and habit in Proust's 'Combray' in Essay

Discuss the role of repetition and habit in Proust's 'Combray' in relation to another novel - Essay Example The early twentieth century saw a determined effort, on the part of the European intelligentsia, to exclude the masses from culture. In England this movement has become known as modernism.’ In this era the modernist writers initiated the trend of depicting the darker or the true picture of life i.e. the brutality and harshness of life. Some of the major thematic concerns of modernist literature include self identity, the relationship of an individual with his history or past and projection of an individual’s inner conflict i.e. the tug of war between the conscious and the sub-conscious mind. In order to be able to do justice to these themes modernist writers makes use of various aspects of human nature such as habit and repetition to highlight these themes in their works. 2. Combray by Proust The novel is in first person narrative. This first section of the novel ‘The Way by Swann's’ is a walk down the memory lane where the protagonist tells the readers abo ut his childhood days in Combray and the people that surrounded him and the manner in which the absence or presence affected him and made him the man he has become. A lot of major themes and characters are introduced to the readers in this first part of the novel. This part of the novel basically focuses on the people surrounding the protagonist and the manner in which those people influence him and ultimately result in making him the man or individual that he becomes. 2.1. A Portrait of the Artist as a Young Man by James Joyce   This novel is also depicted in first person narrative and just like the former novel it is also a journey of self discovery where the protagonist states the story of his life and the circumstances of his life that made him an individual rather than a replica of his father. The novel is about a boy named Stephen who is surrounded by the people of the modern world who are struggling to bring about a change however they are still unable to do so as their bon ds with their heritage and old norms are very strong. However through this novel Joyce reiterates his point of view that in order to bring about a change one has to start struggling on an individual level first. Moreover a human being has the capacity to make impossible possible. 3. Repetition and Habit Repetition and habit are two aspects of human psychology that project monotony of human life. similarly in modern literature the writers use these themes not only to reflect on the inner turmoil of human mind where it is trying to free itself from the shackles of the stereotypical norms but also help in explaining the role of stream of consciousness and its impact on human life in the modern novels. Writers like Proust and James Joyce are observed to be using repetition and habit in their individual unique manner of depiction. In both the novels In Search of Lost Time the Way by Swann's by Proust and A Portrait of the Artist as a Young Man by James Joyce  it is observed that writer s use repetition and habit as a tool to reflect upon the confused state of human mind where human existence is like a pendulum and he oscillates between the old norms of the society which are drilled in him since the day he was born and the new trends which he desire to follow to become a modern man. 4. Proust’s writing Technique In Combray Proust’s depiction of habit and repetition is evident in the manner he

John Wesley Essay Example | Topics and Well Written Essays - 1250 words

John Wesley - Essay Example Wesley’s preaching mainly focused in developing the Modern Methodist movement, which encompasses the concept of Pentecostalism, the Charismatic movement and Neo-Charismatic churches. Thus, he strongly emphasized on the evangelical status which was much more deviated form the Orthodox Catholic Christianism. Also, he insisted much on perfectionism among the Christians, where he focused on implanting holiness in their heart and life. He framed small groups through which he preached the sacraments and other religious instructions among the members of the groups. Thus the concept of Christian perfectionism was his major basic sacramental theology. â€Å"Wesley wished Methodist to become peculiar people; to abstain from marriages outside the societies; to be distinguished by their dress and by the gravity of speech and manners; to avoid the company of even relatives who were still in Satan’s kingdom.† (Bloy, n. d). Thus, pertaining to the above statement he insisted th at the Methodist to lead a disciplined and spiritual life. Moreover, he always opted for the Open-air teaching where he preached the essence of faith in Salvation and to feel that each and every human being is the child of God and they are filled with God’s spirit. Also he maintained a cordial and amicable relationship with his fellow followers. This part of the content will identify and link the relationship of John Wesley with his followers and his contribution to the Christian History. Wesley traveled all throughout his life meeting all sections of people propagating the vital elements of Methodism and the concept of evangelism. â€Å"He traveled almost constantly, generally on horse back, preaching twice or thrice a day.† (Theology thru Technology). As mentioned above, he formed small groups or societies and propagated his preaching through the groups. Each group had to follow the religious instructions strictly. He insisted the concept of personal responsibility i n developing the spirituality among the members of the societies. He also selected preachers among the groups and they had the role of spreading the concept of evangelism and taking care of the people. His main motive was to administer discipline among the members of the society and thereby allowing them to feel the spirituality and ultimate salvation. His link and relationship with the people, who were his followers, can be easily identified through various events that he implemented during his period. For example, he opened many chapels and made the people to assemble in those chapels and commissioned the preachers respectively. Importantly, he raised funds for the schools, orphanages and established charity homes in various regions of United States of America. Also, he assisted the poor and the sick people by providing them with appropriate medication and other treatment for illness. Thus, he rendered a helping hand for the people who were in need. Moreover he took earnest steps in preparing the religious literatures through which he could make even a lay man understand the essence of Christianity. Through his continuous and constant traveling he was able to meet people and enlighten them with his preaching. â€Å"He is believed to have traveled in the course of his itinerant ministry more then 250,000 miles and to have preached more than 40,000 times.† (John Wesley, n. d.). Thus he spread the vital essence of spiritual Holiness among the people. John Wesley can be considered as a keen observer of Human behavior,