Background Information Muscles in the human body can be classified into three different types- cardiac‚ smooth and skeletal muscles. The skeletal muscles are the muscles that can be controlled voluntarily‚ in things such walking and picking things up. The skeletal muscles are made up of bundles of muscle fibres (which are also known as myofibrils‚ as can be seen below). Each of the muscle fibres contain many sarcomeres‚ which is the most basic form of striated muscle tissue- they consist of two
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spinal cord‚ often involve a combination of spinal cord lesions and segmental root or spinal nerve injuries.The spinal cord itself is organized into a series of tracts or neuropathways that carry motor (descending) and sensory (ascending) information. These tracts are organized anatomically within the spinal cord. The corticospinal tracts are descending motor pathways located anteriorly within the spinal cord. Axons extend from the cerebral cortex in the brain as far as the corresponding segment‚
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A Case of Cerebrovascular Accident by David F. Dean‚ Department of Biology‚ Spring Hill College Case Presentation Samuel Dexter is a -year-old African-American man who is both a husband and father. He is moderately obese (bmi of )‚ and has smoked two packs of cigarettes a day for the past years. He awakes one morning with weakness on his right side. He is a bit confused‚ sees double‚ and his speech is slurred. When he attempts to walk to
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BIOLOGY 2113 Unit IV Review Guide Chapters 13-17 Chapter 13 – True or False 1. The nervous system consists of the brain‚ spinal cord‚ and nerves. 2. The afferent nervous system consists of all outgoing motor pathways. 4. Ependymal cells engulf and destroy microbes and cellular debris in inflamed or degenerating brain tissue. 5. Oligodendrocytes form myelin sheaths around nerve fibers in the CNS. 6. Nerve fibers with many Schwann cells forming a thick myelin sheath are called myelinated fibers
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1. Define the terms ischemia and infarction. Ischemia- local decrease in blood supply Infarction- death & deterioration of tissue resulting from lack of blood supply. 2. What is a stroke? Name the two main types of strokes and describe the mechanism(s) by which each type occurs. Cerebrovascular Accident- condition in which brain tissue is deprived of blood supply. The most common stroke symptoms are: Numbness or weakness (paresis) of the face‚ arm‚ or leg‚ sometimes only on one side;
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origin: Amyotrophic- “A” meaning without‚ “myo” meaning muscle‚ “trophic” meaning nourishment‚ literally translated this term means “without muscle nourishment”. “Lateral Sclerosis” refers to the hardening and scarring of the anterior and lateral corticospinal tracts as the disease progresses (Wijesekera & Leigh‚ 2009). In the US‚ ALS is commonly referred to as “Lou Gehrig’s Disease” for the famous Yankees first baseman‚ who died from the disease in 1941. In the UK‚ ALS is known as “Motor Neuron Disease”
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BIOSC 048: Problem Set Questions 1. Given that cell A has significantly more nongated K+ channels than cell B‚ which cell has the larger resting membrane potential? Explain. If the permeability to K is higher in A than in B‚ then the resting membrane potential (rmp) will be closer to the equilibrium potential in cell A‚ which means the rmp will be more negative in cell A than in cell B; or in other words‚ the potential difference will be LARGER in cell A. 2. Predict the effect of a reduced
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Assignment # 1: Dynamic Systems Theory In the late 20th century‚ developmental Psychologist Esther Thelen emerged with a new theory of human motor development which was fundamentally different from the Neuromaturational theory which was universally accepted at that time as a logical and intuitive model to accurately explain motor development in infants (Schrock‚ 2003). Thelen was not satisfied with this Neuromaturational approach as it left many essential questions unanswered and as
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(Kiernan‚ et al.‚ 2011). Pathological features of the disease include pallor of the corticospinal tract due to motor neuron damage and the occurrence of ubiquitin-positive inclusions in living motor neurons. (Johnson‚ et al.‚ 2010). Motor neurons are specialised nerve cells that can be found in the central nervous system (CNS) and are responsible
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Outline The human cerebrum controls every substantial capacity and translates data from the body’s environment. Knowledge‚ imagination‚ feeling‚ and memory are a couple of more things administered by the cerebrum. Secured by the skull‚ the mind is made of parts called the cerebrum‚ cerebellum‚ and brainstem. The brainstem goes about as a hand-off focus interfacing the cerebrum and cerebellum to the spinal string. The cerebrum gets data through the five detects: locate‚ notice‚ touch‚ taste‚ and
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