The document summarizes ascending and descending tracts in the spinal cord that transmit sensory and motor information between the spinal cord and brain. It describes the three neuron chain of ascending tracts that transmit exteroceptive, interoceptive, and proprioceptive sensory information from the peripheral receptors to the brain. It outlines the major ascending tracts - lateral and anterior spinothalamic tracts for pain/temperature and touch/pressure, and the posterior white column and cuneate and gracilis fasciculi for proprioception. It also summarizes the descending motor tracts including the corticospinal, rubrospinal, vestibulospinal, reticulospinal and tectospinal tracts that
55. dorsal 1/3 rd resulting from occlusion of the posterior spinal artery ventral 2/3 rd resulting from occlusion of the anterior spinal artery
56. Descending tracts By the end of this lecture, students should be able to: define the tract enumerate the tracts according to their functional components illustrate and trace the neuronal chain of each tract apply their knowledge of anatomy to correlate with the clinical condition in relation to the injury to these tracts
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58. cerebellum premotor cortex motor cortex motor unit muscle spindle pyramidal tract sp cd internreurons & central pattern generator extrapyramidal tracts premotor cortex SMA PMC basal ganglia cortical sensory area MOTOR SYSTEM I II III IV V