Spinal Cord Lab [2] Flashcards
Describe the flow of information from sensory receptors in the skin and muscle to brain stem and spinal cord
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Describe the function of the axon collaterals originating in the dorsal (posterior) root ganglia (PRG) that terminate in spinal cord
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Describe the function of axons originating in the neurons in the PRG that ascend and terminate in brain stem.
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Identify the location of neuron cell bodies for preganglionic parasympathetics
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Describe the symptoms occurring after damage of either upper motor neurons or lower motor neurons
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In representative sections of the spinal cord at different levels, identify dorsolateral tract (Lissauer’s tract), the substantia gelatinosa, and the location of the anterolateral tract, and describe the effects of lesions at different levels of this pathway.
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Recognize where along the length of the spinal cord a section is taken from: sacral/lumbar, thoracic, lower cervical, upper cervical, and discuss why the cord is enlarged in lumbar and lower cervical levels.
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Describe the general layout of gray matter in the spinal cord in anterior (or ventral) horn, intermediate gray, and the dorsal horn.
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Discuss the functional consequence for hemilesions of the cord at different levels (Brown‐Sequard syndrome)
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Describe the functions and pathways within the spinal cord of the 3 major spinal tracts: Anterolateral system, dorsal column‐ medial lemniscus, and corticospinal tract
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In representative sections of the spinal cord at different levels, identify the posterior fasciculus and its two subdivisions [fasciculus gracilis (FGr) and fasciculus cuneatus (FCu)] and the information these carry, and discuss the effects of lesions of these structures
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In reference to the pathways of the anterolateral system, describe the ascending flow of information from pain and temperature sensory receptors with soma in the PRG and sensory endings in the skin to spinal cord, and subsequently to thalamus
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