Anatomy study note · Head and neck

Corpus callosum

The great mass of white matter joining the two cerebral hemispheres across the floor of the longitudinal fissure.

Key points

• Joins the two hemispheres.
• Order of development: anterior commissure → hippocampal commissure → corpus callosum.
• All cross through the lamina terminalis.
• White matter: myelinated fibres (oligodendrocytes).
• MS = CNS demyelination.

The full note in the atlas also covers

Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 12, PDF pp. 1562, 1568–1569
• Inderbir Singh’s Human Embryology, ch. 17, PDF pp. 341–342
• BRS Cell Biology & Histology, 7th ed., ch. 9, PDF pp. 163–164, 169

More from the head and neck

• Corpus striatum
• Cricoid cartilage
• Cricothyroid
• Deep cervical lymph nodes
• Digastric
• Dura mater
• Dural venous sinuses
• Epiglottis
• Ethmoid
• External carotid artery
• External ear
• External jugular vein

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