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Brainstem and Cerebellum
Winnie C. W. Chu, MBChB, FRCR; Vivian Y. F. Leung, PhD, RDMS
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Terminology

  • Abbreviations

    • Cranial nerves (CN): Oculomotor nerve (CN3), trochlear nerve (CN4), trigeminal nerve (CN5), abducens nerve (CN6), facial nerve (CN7), vestibulocochlear nerve (CN8), glossopharyngeal nerve (CN9), vagus nerve (CN10), accessory nerve (CN11), hypoglossal nerve (CN12)
  • Synonyms

    • Classical nomenclature (simplified nomenclature)
      • Superior (tentorial), inferior (suboccipital), anterior (petrosal) cerebellar surfaces
      • Primary (tentorial), horizontal (petrosal), prebiventral/prepyramidal (suboccipital) cerebellar fissures
  • Definitions

    • Posterior fossa: Houses brainstem and cerebellum, below tentorium cerebelli (infratentorial)
    • Brainstem: Composed of midbrain (mesencephalon), pons and medulla oblongata
    • Cerebellum: Largest part of hindbrain, integrates coordinations & fine-tuning of movement & regulation of muscle tone

Gross Anatomy

  • Overview

    • Anatomy Relationships

      Anatomy Imaging Issues

      • Imaging Recommendations

        Related Anatomy
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        Related Differential Diagnoses
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        References
        Tables

        Tables

        Terminology

        • Abbreviations

          • Cranial nerves (CN): Oculomotor nerve (CN3), trochlear nerve (CN4), trigeminal nerve (CN5), abducens nerve (CN6), facial nerve (CN7), vestibulocochlear nerve (CN8), glossopharyngeal nerve (CN9), vagus nerve (CN10), accessory nerve (CN11), hypoglossal nerve (CN12)
        • Synonyms

          • Classical nomenclature (simplified nomenclature)
            • Superior (tentorial), inferior (suboccipital), anterior (petrosal) cerebellar surfaces
            • Primary (tentorial), horizontal (petrosal), prebiventral/prepyramidal (suboccipital) cerebellar fissures
        • Definitions

          • Posterior fossa: Houses brainstem and cerebellum, below tentorium cerebelli (infratentorial)
          • Brainstem: Composed of midbrain (mesencephalon), pons and medulla oblongata
          • Cerebellum: Largest part of hindbrain, integrates coordinations & fine-tuning of movement & regulation of muscle tone

        Gross Anatomy

        • Overview

          • Anatomy Relationships

            Anatomy Imaging Issues

            • Imaging Recommendations