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Diencephalon, III. ventricle Dr Gallatz Katalin

Diencephalon, III. ventricle Dr Gallatz Katalin. Parts of the brain. Parts of the brain. Hemispheres Diencephalon Mesencephalon – midbrain Pons Medulla Cerebellum. Lateral surface. Midsagittal surface. Diencephalon and mesencephalon. 1. 4. 5. 2. 1. 2. 3. 3.

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Diencephalon, III. ventricle Dr Gallatz Katalin

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  1. Diencephalon, III. ventricleDr Gallatz Katalin

  2. Parts of the brain

  3. Parts of the brain Hemispheres Diencephalon Mesencephalon – midbrain Pons Medulla Cerebellum

  4. Lateral surface Midsagittal surface

  5. Diencephalon and mesencephalon 1 4 5 2 1 2 3 3

  6. The diencephalon ("interbrain") is the region of the brain that derives from the prosencephalon (forebrain). The diencephalon is located near the midline of the brain, above the midbrain. The third ventricle is the cavity of the diencephalon Functions: The diencephalon is involved in several functions of the body including: - sensation - motor function control - homeostasis - hearing, vision, and taste - autonomic function control - endocrine function control .

  7. Parts of diencephalon • Thalamus • Epithalamus • Metathalamus • Subthalamus • Hypothalamus

  8. Parts of diencephalon • Thalamus • Epithalamus • Metathalamus • Subthalamus • Hypothalamus

  9. Thalamus, epithalamus, metathalamus • Thalamus - borders • med.: III. ventricle • lat.: internal capsule • ant.:interventricular foramen • post.: post.comissure, tectum • Epithalamus • habenules • habenular trigone • habenular commissure • pineal body • Metathalamus • medial geniculate body • lateral geniculate body Subthalamus -- ventral to the thalamus -- caudal and lateral to the hypothalamus

  10. Thalamus, epithalamus

  11. Thalamus, epithalamus, metathalamus

  12. Ventral surface of the hypothalamus 4 1. optic chiasma 2. infundibulum 3. tuber cinereum 4. optic tract 5. mamillary body 1 5 5 2 4 3 5 6

  13. Hypothalamus – ventral surface

  14. Cerebral ventricles: • The cerebral ventricles consist of the lateral ventricles, third and • fourth ventricle. • The ventricles contain cerebrospinal fluid which is produced by • choroid plexus covered by specialized epithelium. • - The third ventricle is a narrow cavity located between the two sides of the • diencephalon. • The third ventricle is connected to the lateral ventricles via interventricular • foramen to the fourth ventricle via the cerebral aqueduct.

  15. Brain ventricles

  16. Walls of the III. ventricle Lateral wall: thalamus, hypothalamus Anterior wall: column of the fornix, anterior comissure, lamina rostralis, lamina terminalis Inferior wall: hypothalamus (optic chiasma, infundibulum, mamillary body Superior wall: lamina choroidea epithelialis tela choroidea and plexus choroideus of the 3rd ventricle

  17. Recesses of the III. ventricle - triangular recess - optic recess - infundibular - suprapineal recess - pineal recess

  18. 3rd ventricle

  19. Brain ventricles

  20. Brain ventricles

  21. - Lamina choroidea epithelialis is a special part of the epithelial lining of the ventricle • - Tela choroidea is the duplication of the pia mater, ít contains the choroid plexus • Tenia choroidea is a thickened line along which the tela choroidea is attached to • the brain surface • Arteries supplying the choroid plexuses: • ant. choroidal artery • post. choroidal artery

  22. Thank you for your attention

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