Test 01 - Introduction Receptor cells use chemical transmitters to communicate with relay cells or afferent nerve fibers. In all sensory systems‚ accessory structures modify‚ in some way‚ the stimulus going to the receptor surface. Receptors are electrically polarized cells and therefore have a resting membrane potential. Stimuli produce‚ in the appropriate receptors‚ a change in the electrical properties that is known as the receptor or generator potential. The two ways in which sensory stimuli
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Multiple Sclerosis Multiple sclerosis is an autoimmune‚ is a chronic‚ often disabling disease that attacks the central nervous system (CNS)‚ which is made up of the brain‚ spinal cord‚ and optic nerves. Symptoms may be mild‚ such as numbness in the limbs‚ or severe‚ such as paralysis or loss of vision. The progress‚ severity‚ and specific symptoms of MS are unpredictable and vary from one person to another. Today‚ new treatments and advances in research are giving new hope to people affected by
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Also called median nerve entrapment‚ CTS occurs when the median nerve‚ a major nerve running from the forearm to the hand‚ is compressed‚ causing heightened and even painful sensations to the palm and wrist. The median nerve is mainly in charge of the hand movements‚ controlling impulses to the hand muscles and the sensations felt in the palm and fingers. The carpal tunnel‚ then again‚ is a narrow passageway of ligaments found in the base of the hand‚ and is where the median nerve can be found. Too
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Chapter 2 Outline The Biological Perspective Neuron A specialized cell transmitting nerve impulses; a nerve cell Dendrites Dendrites are treelike extensions at the beginning of a neuron that help increase the surface area of the cell body and are covered with synapses Soma The soma is the cell body of a neuron. Axon The Axon of a neuron is a singular fiber that carries information away from the soma to the synaptic sites of other neurons (dendrites and somas)‚ muscles‚ Glial
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CLINICAL ANATOMY Chapter 1 Summary Anatomy – science of structure and function of the body Clinical Anatomy – study of the macroscopic structures of the body as it relates to the practice of medicine and application to other health sciences Basic Anatomy – minimal study to understand the overall structure and function of the body Painting: The Anatomy Lesson of Dr. Nicolaes Tulp is a 1632 oil painting by Rembrandt housed in the Mauritshuis museum in The Hague‚ Netherlands History: Hippocrates
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and eye strain b. Hands ache and feel weak c. Gasping for air d. Weakness & Constant fatigue 2. Can you see any common features in Annie’s signs and symptoms? With blurred vision and eyestrain we must look at the optic nerve within the brain. From there‚ what could be causing the difficulty breathing and weakness? It must be a neurological problem involved with the synaptic centers. Since Annie is having such problems when she is working out hard and just playing around
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Anatomy review for the nervous system - Week 12 Study Guide 1. Distinguish the difference between neuron‚ neuroglial cells‚ Schwann cells‚ neurofibrils‚ and astrocytes. Neuron: masses of nerve cells in nervous tissue Neuroglial Cells: provide neurons physiological requirements (fill spaces‚ give support to neurons) Schwann Cells: larger axons of peripheral neurons enclosed in sheaths Neurofibrils: thin‚ long fibrils that run through body of neuron and extends to axon and dendrites; gives neuron
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Recurrent nerve sheath tumor. Postoperative Diagnosis: Recurrent nerve sheath tumor. Operative Procedure: Reexploration of left L5-S1 hemilaminotomy for excision of recurrent left S1 nerve sheath tumor. Anesthesia: General endotracheal. Specimen Removed: Cystic left S1 para root mass (frozen and permanent). IV Fluids: See anesthesia records. Estimated Blood Loss: ______. Complications: None. INDICATIONS: This is a 27-year-old male with the recurrent left S1 nerve sheath
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Emily Muñoz 1/7 period Nervous System The nervous system consist of all the nerves the body has. Controlling not only the actions the body takes but the emotions a human being feels. The spinal cord‚ brain‚ and many nerves revolve around the nervous system. There are three overlapping functions that use millions of sensory receptors‚ that monitor the body. By monitoring the body the functions detect any changes the human body has had.Two components separate the nervous system allowing us to focus
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They are classified asmechanoreceptors which are associated with pressure‚ thermoreceptors which are associated with temperature‚ and nociceptors which are associated with pain (Brodal). Functional Anatomy There are five mechanoreceptors‚ free nerve endings‚ Meissner’s corpuscles‚ Pacinian Corpuscles‚ Merkel’s disks‚ and Ruffini’s corpuscles. Table 1 shows where each receptor is located‚ what their function is in detecting a stimulus‚ and lastly what their rate of adaptation is. The strength of
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