Anatomy study note · Head and neck

Midbrain

The narrow part of the brain passing through the tentorial notch to join the forebrain to the hindbrain.

Key points

• Cerebral peduncles = crus cerebri + substantia nigra + tegmentum.
• Aqueduct; tectum with 4 colliculi.
• Nuclei of III and IV.
• Substantia nigra (dopamine) loss → Parkinson disease.
• Brainstem: nuclei (grey) + tracts (white).

The full note in the atlas also covers

Features · Histology · Development

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 12, PDF pp. 1565–1566
• Inderbir Singh’s Human Embryology, ch. 17, PDF pp. 330–331
• BRS Cell Biology & Histology, 7th ed., ch. 9, PDF pp. 162, 163, 169–170

More from the head and neck

• Middle cerebral artery
• Muscles of facial expression
• Musculus uvulae
• Mylohyoid
• Nasal bone
• Occipital bone
• Occipital lobe
• Occipitofrontalis
• Oculomotor nerve
• Olfactory nerve
• Omohyoid
• Ophthalmic artery

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