Anatomy

Pons

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Pons, Pontine Structure, Pons Cerebri

  • See Also
  1. Brain Stem
  • Anatomy
  • Components
  1. Fourth Ventricle
  2. Nucleii (organized in anterior-to-posterior bands)
    1. Somatic Motor Nucleii (most medial)
      1. CN 6: Abducens Nerve (eye)
    2. Somatovisceral nerves (Branchiomeric Nerves)
      1. CN 5: Trigeminal Nerve (motor nucleus 5, chew)
      2. CN 7: Facial Nerve (facial nucleus, lips/eyes)
    3. Visceral Motor Nucleii
      1. CN 7: Facial Nerve (Superior Salivatory Nucleus)
  3. Spinocerebellar Tract
    1. Continued tracts for transmitting UNCONSCIOUS proprioception Sensation (e.g. walking)
    2. Remains ipsilateral as it courses to the Cerebellum via the superior and inferior peduncles
  4. Spinothalamic Tract
    1. Continued pain and TemperatureSensation tracts from the spinal cord
  5. Medial Lemniscus
    1. Proprioception Sensation from Posterior Columns (via Internal Arcuate Tract)
    2. Within the tract, head is represented medially and legs laterally (as if lying, with head against the midline)
  6. Corticospinal tract
    1. Continued motor tracts to the spinal cord
  • Anatomy
  • Vascular
  1. Basilar Artery
    1. Supplies midline pons
  2. Anterior cerebellar artery
    1. Supplies pons between Basilar Artery and Superior Cerebellar Artery
  3. Superior Cerebellar Artery
    1. Supplies posterolateral pons
  • Anatomy
  • Images
  1. Rostral (superior cross-section)
    1. ponsRostral.png
  2. Caudal (inferior cross-section)
    1. ponsCaudal.png
  3. Other cross section
    1. neuroPonsXsGrayBB701.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  • References
  1. Gilman (1989) Manter and Gatz Essentials of Neuroanatomy and Neurophysiology, Davis, p. 81-96
  2. Goldberg (2014) Clinical Neuroanatomy, Medmaster, p. 24-39
  3. Netter (1997) Atlas Human Anatomy, ICON Learning, p. 108-12