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