Motor neuron

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  • Motor Neuron Symptoms

    The motor neuron diseases (MNDs) are a group of progressive neurological disorders that destroy motor neurons, the cells that control essential voluntary muscle activity such as speaking, walking, breathing, and swallowing. Normally, messages from nerve cells in the brain (called upper motor neurons) are transmitted to nerve cells in the brain stem and spinal cord (called lower motor neurons) and from them to particular muscles. Upper motor neurons direct the lower motor neurons to produce movements such as walking or chewing. Lower motor neurons control movement in the arms, legs, chest, face, throat, and tongue. Spinal motor neurons are also called anterior horn cells. Upper motor neurons are also called corticospinal neurons. Motor Neuron Disease Symptoms Motor neurone disease is a progressive neurodegenerative disorder that leads to decreased control of muscle movement and eventually paralysis. Symptoms can be mild at first and a tendency to drop things is often one of the first signs of the condition to develop. Symptoms usually begin in one area of the body. In some forms of the condition, the hands and feet may be the first regions affected, leading to difficulty picking things up or a tendency to trip, while in others individuals, it may be the…

    Words: 407 - Pages: 2
  • Motor Neuron Disease Case Study

    Problem Scott is a physician in charge of many terminally ill patients, including Sarah. Sarah has a motor neuron disease commonly known as ALS. Sarah has asked Scott for a drug that will reduce her pain but will shorten her life. Should Scott listen to Sarah and administer the drug, provide the standard care for patients with a terminal illness by not administering the drug, or pass Sarah and the decision off to another doctor? Input Scott, a medical doctor, is overseeing the care of a woman,…

    Words: 1840 - Pages: 7
  • HCSMA Case Studies

    Case Study: Hereditary Canine Spinal Muscular Atrophy Genetic Background Hereditary canine spinal muscular atrophy (HCSMA) is proven to be an autosomal-dominate disease that affects most noticeably the Brittany spaniel (Pinter MJ, Waldeck RF, Wallace N, & Cork LC, Motor Unit Behavior in Canine Motor Neuron Disease, 1995). HCSMA originated as a spontaneous mutation in the Survivor Motor Neutron gene found in the purebred Brittany spaniel population (Ericsson. A & Rubin. C, 2012). Due to the…

    Words: 1889 - Pages: 8
  • Mutant SOD1 And Pro-Apoptotic

    Some experiments were aimed at finding how SOD1 becomes pro-apoptotic (promoting programmed cell death) due to the fact that healthy SOD1 are against programmed cell death (Pasinelli et al. 2004). The pro-apoptotic characteristic of mutant SOD1 is demonstrated in vivo and in vitro. The mitochondria inside cells firmly control apoptosis, and the mutant SOD1 that aggregates inside mitochondria triggers the programmed cell death of motor neurons (Pasinelli et al. 2004). One experiment studied…

    Words: 960 - Pages: 4
  • Jenbrassik Case Study

    1. The Jendrassik maneuver played a major role on the patellar reflex. One of the prevailing hypotheses has to deal with the alpha-gamma co-activation theory. It states that the alpha motor neurons activates the motor tone, which leads to the spindles providing feedback to the brain. This process is done by the gamma motor neurons, who are in charge of controlling the stimulation of the cerebellum. Also, both the alpha and gamma motor neurons meet at the same effector muscles. Furthermore, when…

    Words: 841 - Pages: 4
  • 3 Major Types Of Neurons Essay

    Assignment #2 What are the 3 major types of neurons? How are they functionally different? Why are the functional differences important? There are 3 major neurons that the nervous system uses to carry information throughout the body; sensory neurons, interneurons, and motor neurons. Each type of neuron, all functionally different, interacts with the central nervous system, the brain, and the muscles of the body. Some vary in shape and sizes as well as differ in simplicity and complexity.…

    Words: 730 - Pages: 3
  • The Peripheral Nervous System

    structure and functions of the system similarly as well as looking in depth at the neurons and how they communicate The system is split into two components, the central nervous system- which incorporates the brain and also the spinal cord. The structure of this is often secured by the bone and cushioned from injury by spinal fluid. The brain is split into five components, neural structure – is the largest part of the brain. It’s the centre for thought and intelligence. it's divided into right…

    Words: 663 - Pages: 3
  • The Central Nervous System In The Human Body

    impulse may be generated; there is a range of receptor cells adapted to detecting individual stimuli, e.g. rods and cones in the eye. In some cases receptors are distributed all over the body, such as touch receptors in the skin. Sometimes, particular receptors are concentrated in an organ, such as the eye, or an endocrine gland such as the adrenal gland. These stimuli’s are sent to the nervous system by neurons.A neuron is a nerve cell that conducts; all the parts of our nervous system are made…

    Words: 1111 - Pages: 4
  • Skeletal Muscle System

    junction is the area of the skeletal muscle fiber that is innervated by a motor neuron (motor nerve). It plays a key role in body movement and breathing along with our nervous system. The synaptic knob, motor end plate, and the synaptic cleft are all key parts of the neuromuscular junction. The synaptic knob of an axon connects with a skeletal muscle fiber to form the neuromuscular junction. The synaptic knob has numerous synaptic vesicles that are filled with the neurotransmitter acetylcholine.…

    Words: 413 - Pages: 2
  • Multiple Neurosis Case Study

    When Amy placed her finger on the burner, the general sensory receptors (Ireland, 2012) in her skin sent the message that it was hot. The sensory neuron is responsible for carrying the information. This is an afferent neuron, because it is taking the message to the central nervous system. The message is carried through the peripheral nervous system to the spinal cord. Once it reaches the spinal cord, association neurons pass the message to motor neurons. Motor neurons, which are efferent, carry…

    Words: 757 - Pages: 4
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