Medulla Oblongata | |||||||||||||||||||||||||||||
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Its external appearance is characterized by the pyramid anteriorly, olive anterolaterally, tuberculum cinereum posterolaterally , gracile and cuneate tubercles dorsally and the attached nerves The medulla relays sensory information to thalamus and contains major regulatory centers in its reticular formation It also a number of nuclei:
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The internal anatomy of the closed and open medulla demonstrates the following structures .
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Fiber bundles | |||||||||||||||||||||||||||||
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Blood supply to the medulla oblongata |
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Four main arteries supply the medulla oblangata Anterior spinal arteries supplying the antero-medial structures namely - Pyramids - Medial lemniscus - Hypoglossal nucleus - Medial Longitudinal fasciculus - Solitary and vagal nuclei Posterior spinal arteries supplying the fasciculus and nucleus gracilis and cuneatus Posterior inferior cerebellar artery supplying the retro-olivary region, including - Spinothalamic tract - Spinal trigeminal nucleus - Nucleus ambiguus Hypothalamo spinal tracts Bulbar branches of the vertebral artery supplying the pyramids, hypoglossal, nucleus, and inferior olivary nuclear complex.
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Tracts of the Medulla Oblangata
The medulla oblangata contains all the tracts ascending to the brain, and those descending to the spinal cord. Key among them are
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Applied anatomy | |||||||||||||||||||||||||||||
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