Functions, Diseases, Projections 4th page

Functions, Diseases, Projections 4th page - Diseases...

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Functions Posteromedian Sulcus : N/A Pyramidal Decussation : The part of the medulla where 75 to 90 percent of the corticospinal fibers in the pyramid cross over to the opposite side to form the lateral corticospinal tract. Pyramid : Carries descending corticospinal fibers from the cortex to the lateral and anterior corticospinal tracts in the spinal cord and carries corticobulbar fibers to cranial nerve nuclei in the brain stem. Olive : Involved in motor coordination via connection to the cerebellum. Optic Chiasm : The structure where the two optic nerves come together. This allows for the nerves connected to the right eye that attend to the right visual field to cross over to the left hemisphere and vice versa. Olfactory Bulbs : The main relay stations in the olfactory pathways. Its functions include the enhancement of discriminating between odors and sensitivity of odor detection.
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Unformatted text preview: Diseases Posteromedian Sulcus : N/A Pyramidal Decussation : Hemiplegia cruciata can result from lesions in the lower medulla that damages the crossed fibers to the arm as well as the uncrossed fibers to the leg. Pyramid : It has been suggested that a lesion in the pyramid can cause weakness and hyperreflexia. Olive : N/A Optic Chiasm : Lesions in the optic chiasm can lead to bitemporal hemi-anopia, which is the loss of vision in the bitemporal visual fields. Olfactory Bulbs : Tumors or lesions in the olfactory bulbs can result in the loss of smell. Projections Posteromedian Sulcus : N/A Pyramidal Decussation : N/A Pyramid : Projects into the pons. Olive : Projects into the pons. Optic Chiasm : Projections of the optic chiasm include the optic tracts, which are continuations of the optic nerves. Olfactory Bulbs : N/A...
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This note was uploaded on 04/18/2008 for the course PSY 375 taught by Professor Kelley during the Fall '07 term at Bridgewater College.

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Functions, Diseases, Projections 4th page - Diseases...

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