Anatomy study note · Head and neck

Internal capsule

The compact band of fibres passing between the cerebral cortex and lower centres, lying between the lentiform nucleus laterally and the caudate nucleus and thalamus medially.

Key points

• Lentiform lateral; caudate + thalamus medial.
• Corticospinal + corticobulbar fibres.
• Lenticulostriate bleed → contralateral hemiplegia.
• White matter: myelinated fibres (oligodendrocytes).
• MS = CNS demyelination.

The full note in the atlas also covers

Features · Blood supply · Histology · Development · Clinical notes

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Written from

• Inderbir Singh’s Human Embryology, ch. 17, PDF pp. 338–339
• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 12, PDF pp. 1560, 1642
• BRS Cell Biology & Histology, 7th ed., ch. 9, PDF pp. 163–164, 169

More from the head and neck

• Internal carotid artery
• Internal jugular vein
• Iris
• Lacrimal apparatus
• Laryngeal membranes and ligaments
• Larynx
• Lateral cricoarytenoid
• Lateral pterygoid
• Lateral rectus
• Lens
• Levator palpebrae superioris
• Levator veli palatini

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