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Chapter 14 AUTONOMIC nervous system
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Recommended: Chapter 14 AUTONOMIC nervous system
Familial dysautonomia affects the development of sensory neurons. It affects two important nervous systems: the autonomic nervous system, which controls a persons involuntary actions, and the sensory nervous system, which controls a persons senses. It starts at birth and shortens a victim’s life span drastically. (Genetics Home Reference)
At birth, children with familial dysautonomia are diagnosed by a distinct set of symptoms. (FD Facts) Poor muscle tone and lack of tears are two symptoms that can be detected very early. As they get older they have a hard time maintaining body temperature, they hold their breath for long periods of time and have a delay in speech and walking. The cause of these symptoms is due to a defect IKBKAP gene. Someone with familial dysautonomia has two copies of IKBKAP in each cell, which means a mutation occurred. This mutation disrupts the information in the IKBKAP gene that helps the production of IKAP protein. The IKAP protein is used for brain functions but when the mutation occurs, not enough of the proteins are made for the brain to function properly...
Percy, A. K. (1999). Inherited neurodegenerative disease: The evolution of our thinking. Journal of Child Neurology, 14(4), 256-62. Retrieved from
Ivy is the third generation in her family to be affected by achondroplasia. Her grandfather, her father, and her brother also have it. Achondroplasia is inherited as an autosomal dominant trait whereby only a single copy of the abnormal gene is required to cause achondroplasia. Nobody with the mutated gene can escape having achondroplasia. Many individuals with achondroplasia have normal parents, though. In this case, the genetic disorder would be caused by a de novo gene mutation. De novo gene mutations are associated with advanced paternal age, often defined as over age 35 years. If an individual with achondroplasia produce offspring with a normal individual, the chances of the offspring inheriting the mutant allele achondroplasia is 50%. If both of the parents have achondroplasia, the chances that their offspring will be of normal stature a...
Hypokinetic Dysarthria is a motor speech disorder that is often associated with Parkinson’s disease (PD). It can occur when there is interference in the basal ganglia control circuit. These disruptions can include “degenerative, vascular, traumatic, infectious, inflammatory, neoplastic, and toxic-metabolic diseases (Duffy, 2013, p. 176).” Damage to the basal ganglia control circuit results in reduced range of motion as well as the inability to inhibit involuntary movements. Hypokinetic dysarthria is most commonly caused by PD; a progressive, neurogenic disease that is characterized by tremor, rigidity, slowness of movement, and incoordination. Eighty-seven percent of hypokinetic dysarthria cases are associated with degenerative disease (Duffy, 2013).
In 1980, the first reported case of Angelman disease was reported in America. As more and more children were being diagnosed with Angelmans disease, a professor from the University of Florida, Dr. Charles Williams, started researching the disease. Years went by with no progress, but then in 1987 Dr. Williams discovered that a code was missing from chromosome 15. This new information was a breakthrough, but it would still until 1997 to figure out that the UBE3A gene on chromosome 15 was mutilated or missing in patients diagnosed with Angelman disease. Since 1997 doctors and scientists have been able to find that Angelman disease is a neuro-genetic disorder which means that Angelman disease is very complex and attacks the nervous system. They have also been able to determine that the disease is rarely inherited and that the mutilation of the UBE3A gene occurs during sperm and egg formation.
Canavan Disease is a fatal neurological disease where there is significant damage to the nerve cells in the brain. There is a defect in the myelin sheath that causes many problems for the nervous system. The major problem is caused when the enzyme aspartoacyle is not present. This missing enzyme causes a chemical imbalance that causes this defect in the myelin sheath. The myelin in the brain destructs which makes it a spongy tissue. This causes overall muscle weakening and slower movements, leading to severe mental retardation. A recent study has shown that the cells in the brain that are responsible for making myelin sheaths (oligodendrocytes), cannot complete the task. When babies are born they may not show any signs at all until the first few months. This disease is only inherited and categorized under a group of diseases called leukodystrophies. Leukodystrophies gets its name because it means there is a degeneration of myelin, which is a fatty cushioning that shields nerve fibers. This makes the nerve signals very difficult to transmit. People with Canavan Disease life span can range from a couple days, months, or maybe even until their twenties (Genetics Home Reference, n.d.); (Canavan Foundation, n.d.).
Rett syndrome is a progressive neurological disorder that affects almost exclusively in females. The most basic symptoms include decreased speech, cognitive disabilities, severe lack of muscle control, small head size, and unusual hand movements. A woman with a mutation in her MECP2 gene, has a 50% risk with any pregnancy to pass on her X chromosome with the mutation. It is not common for women with Rett syndrome to have children because the severity of the disorder. The mutated gene on the X chromosome that is responsible for causing Rett syndrome is the methyl CpG-binding protein 2, MECP2 gene. The gene makes a protein that controls other genes. When a mutation occurs in the MECP2, the protein it makes does not work properly. This is thought to counteract normal neuron, nerve cell development. The severity of the syndrome in females is related to the type of mutation in the MECP2 gene and the percentage of cells that carry a normal copy of the MECP2 gene. Rett syndrome is believed to affect all ethnic groups and nationalities with an equal frequency of about 1 case for every 10,000 to 15,000 live female births.
The Autonomic Nervous System is responsible for the functions of the body that are not thought about to control. When this system dysfunctions, it can cause havoc on the human body. One example of this would be Dysautonomia. Dysautonomia is a rare but serious disease that affects the autonomic nervous system, has many symptoms, and offers few treatment options.
Unpleasant breathlessness that comes on suddenly or without expectation can be due to a serious underlying medical condition. Pneumonia can impact the very young and very old, asthma tends to affect young children, smokers are at greater risk of lung and heart disease and the elderly may develop heart failure. However, medical attention always needed by all these conditions as it can affect any age group and severe breathlessnes. There are short and long term causes of dyspnea. Sudden and unexpected breathlessness is most likely tend to be caused by one of the following health conditions. There is accumulating evidence that in many patients, dyspnea is multifactorial in causes, and that in most patients, there is no single, all-encompassing explanation for dyspnea.
 Mild, chronic depression has probably existed as long as the human condition, although it has been referred to by various different names. The DSM-III replaced the term “neurotic depression” with dysthymic disorder--which literally means ‘ill-humored’-and it was added to the Diagnostic and Statistical Manual of Mental Disorders, 1980
Rett syndrome is a particular neurological disorder that is first found in the first few months of life and typically almost always diagnosed in girls, but can be seen in boys, rarely, but it is possible (International Rett Syndrome Foundation, 2014). Rett syndrome symptoms soon appear after an early period of regular or near regular development until six to eighteen months of life, when there is a slowing down or stopping of skills. A period of backsliding then follows when the young female child loses communication skills and purposeful use of her hands. Soon, the known physical handicaps became visible such as washing hands, difficulty walking, and head growth abnormalities, the head will grow slower than it supposed to. More symptoms that may be brought on by the syndrome can include seizures and rapid and/or slow breathing repetitions while the child is not sleep. In the younger years of childlife, there may be a time of separation or withdrawal when she is irritable and cries inconsolably. With time, motor skill problems may increase, but in generally, the irritability the child endures lessens and eye contact and communication improve (International Rett Syndrome Foundation, 2014). According to rettsyndrome.org, Rett syndrome is caused by mutations on the X chromosome on a gene called MECP2. There are more than 200 different mutations found on the MECP2 gene. Most of these mutations are found in eight different spots. It strikes all racial and ethnic groups, and occurs worldwide in 1 of every 10,000 to 23,000 female births (Rett Syndrome Foundation, 2014). It is not a degenerative disorder, saying that this syndrome does not cause the body or the mind of the infected child to become weaker. It also causes problems in brai...
The causes of sensory processing disorder are in the child 's genes. Children with sensory processing disorder often have problems with motor skills and other abilities. Due to these problems, they become socially isolated and endure low self-esteem, along with other issues. Having these problems the individual could have social and educational problems. “Sensory Processing Disorder can affect people in only one sense, just touch or just sight or just movement or in multiple senses. One person with Sensory Processing Disorder may over-respond to sensation and find clothing, physical contact, light, sound, food, or other sensory input to be unbearable. Another might under-respond and shows little or no reaction to stimulation, even pain or extreme hot and cold.” (SPDF 1) They might not be able to adapt to situations like a normal child will so they can have a hard time making friends and could be an outcast of groups. Sensory Processing Disorder is how information is processed and input is absorbed and organized. The body would be ready to learn, move, understand emotions, interact, and develop properly if they didn’t have Sensory Processing Disorder. Anyone can get help; there is valuable treatment for sensory processing disorder. Still, as children grow older, they are not diagnosed and don’t realize it till they are an adult. It can affect them in every day, work, family, friends, etc. Another research study by the Sensory Processing Disorder Scientific Work Group (Ben-Sasson, Carter, Briggs-Gowen) suggests that 1 in every 6 children experiences sensory symptoms that may be significant enough to affect aspects of everyday life functions. Symptoms of sensory processing disorder, like those of most disorders, occur within a broad spectrum of severity. While most of us have infrequent difficulties processing information, for children and adults with sensory processing disorder,
People now a days have a problem with the way they appear. For hundreds of years, people, especially females, have been concerned with their weight, the way they look, and the way people perceive them. In the article, Do You Have a Body Image Problem? author Dr. Katharine A. Phillips discusses the concerns with body dysmorphic disorder (BDD). Dr. Phillips uses her knowledge or ethics to discuss the effects that BDD has on people today. She also uses emotion to show the reader how people are seriously affected by this disorder. In Dr. Phillips article, she discusses how people are emotionally and socially affected by the body dysmorphic disorder, and how society is also affected by it.
According to Hassold and Sherman (2002), the probability of giving birth to a child with DS is not linked to any race, ethnicity, socioeconomic status or geographic location. Maternal age seems to be the only etiological factor that may cause DS. Some characteristics of DS include: deep folds at the corners of the eyes, hypotonia, short stature, flexible joints, small oral cavity and heart defects (Taylor, Richards, & Brady, 2005). Most individuals with DS have a moderate intellectual disability, although there is a range of disability, from severe to high functioning (IQ above 70). Since DS is a birth defect and not a disease, there are no treatment options.
Congenital Insensitivity to Anhidrosis (or CIPA) is a rare genetic disease with the characteristics of not being able to feel any pain or temperature, and little or no sweating. It is inherited by an autosomal recessive pattern, meaning that both parents have a mutated NTRK1 gene, but they do not show any symptoms of CIPA. The damaged NTRK1gene produces proteins that cannot transmit signals. Since the neurons do not get any signals from the proteins, they perform apoptosis. Apoptosis is a process by which neurons self-destruct.
~ Mysteriously and in ways that are totally remote from normal experience, the gray drizzle of horror induced by depression takes on the quality of physical pain ... it is entirely natural that the victim begins to think ceaselessly of oblivion. ~William Styron (1925-2006)