...job of the central nervous system (CNS)? The central nervous system, also known as the CNS, consists of three(3) major components of the human body: * Brain – the brain is made up of three(3) parts: the cerebrum, the diencephalon, and the hindbrain. * Nerve Tissue – this part of the CNS is comprised of neurons, synapses, and neurotransmitters. * Spinal Cord – protected by vertebrae in the back, the spinal cord is made up of fiber tracts and spinal nerves. (Pedersen DD; PsychNotes: Clinical Pocket Guide, 3rd ed, F.A. Davis Company, 2011, Ch. 9, pg. 1) One of the two major divisions of the human body’s nervous system, the central nervous system is responsible for integrating sensory information and responding accordingly. In other words, its job is to get information from the body and send out instructions to the body. * What is the job of the peripheral nervous system (PNS)? The peripheral nervous system, or PNS, is made up of two(2) components of the human body: * Afferent System – this system is made up of somatic and visceral sensory neurons. * Efferent System – this part of the PNS controls the somatic nervous system (somatic motor neurons), as well as the parasympathetic nervous system, both of which are made up visceral motor neurons. (Pedersen DD; PsychNotes: Clinical Pocket Guide, 3rd ed, F.A. Davis Company, 2011, Ch. 9, pg. 2) The other major division of the human body’s nervous system, the peripheral nervous system, consists...
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...NERVOUS SYSTEM The nervous system is the complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. CENTRAL NERVOUS SYSTEM The Central NS is made up of the brain and spinal cord BRAIN The brain lies within the skull and is shaped like a mushroom. The brain consists of four principal parts: * the brain stem * the cerebrum * the cerebellum * the diencephalon The brain weighs approximately 1.3 to 1.4 kg. It has nerve cells called the neurons and supporting cells called the glia. There are two types of matter in the brain: grey matter and white matter. Grey matter receives and stores impulses. Cell bodies of neurons and neuroglia are in the grey matter. White matter in the brain carries impulses to and from grey matter. It consists of the nerve fibers or the axons. * The brain stem The brain stem is also known as the Medulla oblongata. It is located between the pons and the spinal cord and is only about one inch long. * The cerebrum The cerebrum forms the bulk of the brain and is supported on the brain stem. The cerebrum is divided into two hemispheres. Each hemisphere controls the activities of the side of the body opposite that hemisphere. The hemispheres are further divided into four lobes: * Frontal lobe * Temporal lobes * Parietal lobe * Occipital lobe * The cerebellum This is located behind and below the cerebrum. * The diencephalon ...
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...Phineas Gage Paper Stacy M Fender psy/360 July 14 2014 Brenda Edmons Phineas Gage Paper September 13, 18348 a man by the name of Phineas Gage was in a terrible railway construction accident. Phineas was in the town of Cavendish in the state of Vermont; he was tampering iron; these are around three feet long. Buy the chance the iron was fired, and it went through his head, after a CT scan which was cutting edge technology in its time, this showed the iron had gone through his cranium, destruction of his left frontal lobe. Even though he had a painful mishap, Phineas Gage made a remarkable improvement; he was alive for 12 years. He moved to San Francisco, and on the date of May 21, 1860 he died of epilepsy difficulties. The brain has been studied for many years by researchers trying to find the role cognitive functions play in the brain. Phineas was given the diagnosis of traumatic brain injury also known as TBI; this gives comprehension of how TBI's shape cognitive functions. It’s unfortunate that Phineas went through his tragic accident, but it did help researchers find the crucial knowledge of the brain and the areas that show proof of cognitive functions and how traumatic brain injury (TBI) happens. A person's cognitive abilities can foresee functional aftermath after a TBI (traumatic brain injury). The degree of concurrent rational abilities influences the significance of the functional renewal. The changes of a person's social, emotional, and behavioral functioning...
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...1.1 Introduction Multiple sclerosis is a disease of the central nervous system, harms the brain's ability to send and receive signals. It is considered one of the common diseases of the central nervous system. It affects in most cases the children and people aged between 20-40 years. Multiple sclerosis (MS) is an inflammatory disease of the central nervous system. The central nervous system is made up of the brain, spinal cord, and optic nerves. The exact reason(s) for the inflammation that occurs in MS are not yet known, and this remains an active area of research. We do know that the inflammation damages both neurons and the myelin that protects neuronal processes (called axons). The effect of multiple sclerosis (MS) on the individual and...
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...BIO-REGULATORS OF HUMAN BEHAVIOR Human beings – products of biological functions and their behaviors are influenced by many factors (one of these factors is biological or physiological) Nervous system & Endocrine system (both biological & physiological) – regulators of human behaviors. The Nervous System * Most complex and elaborate system of biological structure in the human body. It regulates the behavior of an individual to make him survive. Neuron – the basic unit of the nervous system Producing and transmitting electrical and chemical signals from a stimulus to a response. (Distinct parts: dendrites, soma, axon, myelin sheath, nodes.) Dendrites – fine and tiny hairlike structure looks like a branch of a tree. They receive nerve impulses (messages/information which are electrical in nature) for nearby neurons and send the information to the cell body (the process is called axonal transmission) Cell body or soma – contains the nucleus that provide energy for transmitting the stimulus received from the dendrites to axon. It performs work of metabolism. Axon – found at the other end of cell body. It carries away the stimulus to Another neuron. *There is only one axon in neuron. (process of transmitting info from neuron to neuron is called synaptic transmission) Myelin sheath – fatty material that covers and protects the axons. Its function is tospeed up the conduction of nerve impulses. Nodes – they serve as break on the momentum of the speed...
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...The nervous system is made up of two systems that work together to help the body function. One of the systems is the Central Nervous System (CNS) which consists of the spinal cord and the brain. The other system is the Peripheral Nervous System (PNS) which is made up the nerves that connect to the rest of the body. Working together they both contribute to the wonder known as the nervous system, but how? (Better Health Channel, 2014). As said before, the Nervous system is made up of two systems, CNS and PNS. However, Neurons are microscopic cells that play a massive part in the workings of the Nervous system. What sets apart Neurons form other cells is that they can transmit electrochemical signals when stimulated. Neurons naturally have a small negative charge but when stimulated they produce enough electrical energy to create a reaction in these systems (Better Health Channel, 2014). If you have ever hurt a part of your body, say your leg, you would know that sometimes it feels like the pain is shooting up the entire leg. This is due to the Neurons being stimulated when the leg is hurt which causes a reaction in the nerves. I bet your wondering how the pain travels all the way up you leg. This is due to synapses (Better Health Channel, 2014)....
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...by involuntary contraction of muscles and associated esp. with brain disorders such as epilepsy, the presence of certain toxins or other agents in the blood, or fever in children. Migraine headache- a recurrent throbbing headache that typically affects one side of the head and is often accompanied by nausea and disturbed vision. Multiple sclerosis- a chronic, typically progressive disease involving damage to the sheaths of nerve cells in the brain and spinal cord, whose symptoms may include numbness, impairment of speech and of muscular coordination, blurred vision, and severe fatigue. Neuroma- another term for neurofibrousa Paralysis- the loss of the ability to move (and sometimes to feel anything) in part or most of the body, typically as a result of illness, poison, or injury. Tay sachs- disease (also known as GM2 gangliosidosis or hexosaminidase A deficiency) is a rare autosomal recessive genetic disorder. Tension headache- headaches are the most common type of headaches among adults. They are commonly referred to as stress headaches Chapter 11 Chapter Assesment: Terms: Alzheimer’s disease- progressive mental deterioration that can occur in middle or old age, due to generalized degeneration of the brain. It is the most common cause of premature senility. Amyotrophic lateral sclerosis- a progressive degeneration of the motor neurons of the central nervous system, leading to wasting of the muscles and paralysis. Anencephaly- is the absence of a major...
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...it sits in the skull at the top of the spinal chord. The brain is so complex that doctors and scientists still don’t know what some parts do. The brain is made up of different sections consisting of the frontal, parietal, occipital and temporal lobes. Memory Part of the brain that is responsible for memory is also known as the hippocampus, it is located within the temporal lobes, adjacent to the amygdale. The hippocampus is involved in memory forming, organizing and storing information. It is particularly important in storing new memories and connecting emotions and senses, such as smell and sound to, memories. A case study of H.M. (1953) highlights how important the function of the hippocampus is. H.M. was a man who suffered from epilepsy who had surgery to remove the hippocampus to prevent his severe symptoms. After his operation he suffered from major memory loss, which then went on to cause an inability to transfer new information into his long term memory. This resulted in the realisation that the removal of the hippocampus can have detrimental effects on the brains memory. Language and speech The Boca’s area is one of the main areas of the brain which is responsible for producing language. It is located in the lower portion of the left frontal lobe and was discovered by French neurosurgeon Paul Broca .He realised that people who had language difficulties often had damage to this area of the brain. This part of the brain controls motor functions involved with speech...
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...COMMENTS ON CENTRAL NERVOUS SYSTEM AND RADIOLOGICAL ANATOMY Radiological Anatomy Radiological anatomy is a medical specialty that employs the use of imaging to both diagnose and treat disease visualised within the human body. It explores various tissue densities to be able to determine structures. It could either be invasive or non-invasive. Radiologists use an array of imaging techniques which include: • Conventional radiography (X-ray) • Ultrasound • Computerized Tomography • Magnetic Resonance Imaging • Interventional Radiology • Radiation Therapy The acquisition of medical imaging is usually carried out by the radiographer or radiologic technologist. The radiologist then interprets or "reads" the images and produces a report of their findings and impression or diagnosis. Central Nervous System The nervous system is organized into two parts: the central nervous system, which consists of the brain and the spinal cord, and the peripheral nervous system, which connects the central nervous system to the rest of the body. In the central nervous system, the brain and spinal cord are the main centres where communication of nervous information occur. Both the brain and spinal cord are covered with a system of membranes, called meninges and are suspended in the cerebrospinal fluid; they are further protected by the bones of the skull and the vertebral column. The central nervous system is composed of large numbers of excitable...
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...The SHH protein is expressed by the SHH gene, the SHH protein (a morphogen) plays a pivotal role in embryogenesis by inducing development by chemical signaling. SHH is important for cell growth, specialization, and patterning of the body. It is also important for brain and spinal cord development (ventral CNS patterning), as well as development of the eyes, limbs, and various other parts of the body. During embryogenesis, SHH is expressed in the notochord, floor plate of the neural tube, brain, gut, and zone of polarizing activity (ZPA) of limbs. In particular, two of the critical structures that SHH induces are the floor plate and neural tube. Both of these structures are critical for central nervous system (CNS) development. The neural tube eventually develops into the brain and spinal cord. Whilst the floor plate serves as structural support for the neural tube and also guides tissues to their designated positions during development. In particular, the floor plate requires a high concentration of SHH to be present during development in order to form and function properly. Roesseler et al. showed that diminished expression of SHH will result in developmental disorders such as HPE. SHH participates in a Sonic Hedgehog-Patched-Gli (SHH-PTCH-GLI) pathway. Dysfunctional regulation of the SHH-PTCH-GLI pathway leads to various human developmental disorders and...
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...Chapter 01 Pre Test | 1. | Which of the following is a guideline for doing research with people? | | | a. | Participants cannot just quit without a valid, logical reason. | b. | Deception is never justified. | c. | Participants must be allowed to make an informed decision about participation. | d. | Participants must understand that confidentiality is not guaranteed. | | | | | | | | Grade: | 2 | | | User Responses: | c.Participants must be allowed to make an informed decision about participation. | | | Feedback: | a.Correct. Ethics of Psychological Research, p. 34 | | 2. | A ________ has a medical degree and is a medical doctor who specializes in the diagnosis and treatment of psychological disorders. | | | a. | psychoanalyst | b. | psychiatrist | c. | psychologist | d. | psychiatric social worker | | | | | | | | Grade: | 2 | | | User Responses: | b.psychiatrist | | | Feedback: | a.Correct. Psychological Professionals and Areas of Specialization, p. 18 | | 3. | Researchers who allow their expectations about what they will see to affect the results of their observation studies are suffering from: | | | a. | controlled observation. | b. | participation observation. | c. | the observer effect. | d. | observer bias. | | | | | | | | Grade: | 2 | | | User Responses: | d.observer bias. | | | Feedback: | a.Correct. Psychology: The Scientific Methodology, p. 23 | | 4. | Researchers...
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...threadlike structure that extends from, & carries signals away from, the cell body to neighboring neurons, organs, or muscles. Myelin Sheath: Looks like separate tube like segments composed of fatty material that wraps around & insulates an axon. Prevents interference from electrical signals generated in adjacent axons. End Bulbs or Terminal Bulbs: Look like tiny bubbles that are located at the extreme ends of the axon's branches. Each one is like a miniature container that stores chemicals called neurotransmitters, which are used to communicate with neighboring cells. Synapse: An infinitely small space (20-30 billionths of a meter) that exists between an end bulb & its adjacent body organ (heart), muscles (head), or cell body. 2. The central nervous system: Made up of neurons located in the brain & spinal cord. 3. Differences between neurons and nerves affect recovery, One reason neurons have only a limited capacity to be repaired or rewired after damage is that there is a genetic program that turns off regrowth when neurons become fully grown by causing problem with motor coordination, strength and sensation. Recent advances in stem cell research suggest the human brain may be able to grow more neurons. If this were possible, the brain could repair damage caused by an accident or disease, such as Alzheimer’s 4. A Phantom Limb is the sensation that an amputated or missing limb (even an organ, like the appendix) is still attached to the body and is moving appropriately with other...
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...The Digestive System is made up of organs that break down food into protein, vitamins, minerals, carbohydrates, and fats, which the body needs for energy, growth, and repair. After the food is chewed and swallowed, it goes down the throat and enters the stomach. It is further broken down by powerful stomach acids. From the stomach the food travels into the small intestine. This is where your food is broken down into nutrients that can enter the bloodstream through tiny hair-like projections. The excess food that the body doesn't need or can't digest is turned into waste and is eliminated from the body. The digestive system is a key component of everyday life due to the fact it handles all the intake of water and food sources. The Endocrine System is made up of a group of glands that produce the body's long-distance messengers, or hormones. Hormones are chemicals that control body functions, such as metabolism, growth, and sexual development. The glands, which include the pituitary gland, thyroid gland, parathyroid glands, adrenal glands, thymus gland, pineal body, pancreas, ovaries, and testes, release hormones directly into the bloodstream, which transports the hormones to organs and tissues throughout the body. This system is not a major component but does play an important role in the growth process. The Lymphatic System is also a defense system for the body. It filters out organisms that cause disease, produces white blood cells, and generates disease-fighting...
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... Nervous systems, function and survival Invertebrates and vertebrates are compiled of many different cells, systems and functioning pathways all of which are maintained by homeostasis. In this essay I will discuss the connection between homeostasis and the nervous system; briefly compare an invertebrates and vertebrates nervous system; nerve cells and how an organism’s behaviour can be determined by these factors. To survive every living organism endeavours to maintain a sense of balance, or homeostasis. This is an internal process which repairs and sustains different parameters and is constantly challenged by both internal and external factors. An organism’s nervous system, which can control thousands of activities simultaneously (both voluntary and involuntary), transmits signals between the different parts of the body and is responsible for regulating the processes which maintain homeostasis. (Datta et al. 2006 pp.8-10) In invertebrates the nervous system consists of either a nerve net (such as in jellyfish) or neurons grouped together forming ganglia which make up the nerve cord, or CNS of the organism (as found in earthworms). (Datta et al. 2006 pp.47-9) In contrast the nervous system in vertebrates can be divided into two parts, the brain (the control centre of the body) and the spinal cord, collectively known as the central nervous system (CNS) and all the other nerves in the body, collectively known as the peripheral nervous system (PNS). (Datta et...
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...PSY 11 OUTLINE: CHAPTER 4 TITLE: SKIN RECEPTORS AND CUTANEOUS SENSATIONS The sense organ involved in the sense of is the skin. The skin or cutaneous sensation responded to touch, pressure, warmth, cold and pain. If the skin feels an object on it, the sensation aroused is touch while if an object is pressed firmly against the skin, the sensation aroused is pressure. Pain and pressure are referred to as tactual or tactile experiences. Warmth and cold are called thermal experiences. Different layers of skin that differs in degree of sensibility: * The epidermis or outer layer * The dermis or intermediate layer; and * The adipose tissue or the deep layer Sensitivity of the skin various stimulation is not equally distributed. Lips and Fingertips * Very sensitive to touch and pressure Skin Tissue * Sensitive to pain when pinched or pricked. Calf of the leg * Sensitive to cold VESTIBULAR SENSATION This is the sense of balance that gives information about one’s body as a whole and its position in relation to the pull of gravity and balance. Vestibular Apparatus * Located in the inner ears which are composed of vestibular sacs and semicircular canals Vestibular sacs...
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