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Lateral ventricle of Brain. By Dr.N.Mugunthan.M.S

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Lateral ventricle of Brain. By Dr.N.Mugunthan.M.S

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Lateral ventricle of brain. Lecture by Dr.N.Mugunthan.
Associate Professor,
Mahatma Gandhi Medical College & Research Institute,
Sri Balaji Vidyapeeth, Pondicherry.

Lateral ventricle of brain. Lecture by Dr.N.Mugunthan.
Associate Professor,
Mahatma Gandhi Medical College & Research Institute,
Sri Balaji Vidyapeeth, Pondicherry.

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Lateral ventricle of Brain. By Dr.N.Mugunthan.M.S

  1. 1. Lecture By MBBS .,MS .,DNB.,MNAMS., PhD.,MBA (Hosp.Adm) Associate professor MGMC &RI
  2. 2. Learning objectives • Development of ventricles • Parts of lateral ventricle • Relations of lateral ventricle • Communications • Formation & circulation of CSF • Applied anatomy • Summary © Dr.N.Mugunthan
  3. 3. Development of ventricles © Dr.N.Mugunthan
  4. 4. Lateral ventricles Each cerebral hemisphere has lateral ventricle Roughly C shaped Wraps around thalamus, lentiform nucleus & caudate nucleus Lined by ependyma Filled with CSF Capacity 7-10ml © Dr.N.Mugunthan
  5. 5. Two lateral ventricles are separated by a septum- septum pellucidum. Septum pellucidum – thin vertical sheet of nervous tissue, (grey & white matter). Covered on either side by ependyma. Lateral ventricles cont… © Dr.N.Mugunthan
  6. 6. Each lateral ventricle communicates with 3rd ventricle thro’ the interventricular foramen of Monro Lateral ventricles contain the choroid plexus Lateral ventricles cont… © Dr.N.Mugunthan
  7. 7. Parts of lateral ventricle Each lateral ventricle has 4 parts 1. Central part or Body 2. Anterior horn 3. Posterior horn 4. Inferior horn © Dr.N.Mugunthan
  8. 8. Parts of lateral ventricle cont… © Dr.N.Mugunthan
  9. 9. Central part (or) body Situation : within the parietal lobe Extent: Front - interventricular foramen Behind – splenium of corpus callosum Presenting parts : (coronal section – triangular in shape)  Medial wall  Roof  Floor © Dr.N.Mugunthan
  10. 10. Roof :  Under surface of body of corpus callosum Floor :( from lateral to medial side)  Body of caudate nucleus  Stria terminalis & thalamostriate vein  Upper surface of thalamus(lateral part)  Choroid plexus  Upper surface of body of fornix Medial wall :  Septum pellucidum Central part (or) body cont… © Dr.N.Mugunthan
  11. 11. Anterior horn (frontal horn)  Ant.extension of central part Situation: frontal lobe Extent: from interventricular foramen to post.surface of genu Presenting parts : (coronal section – roughly triangular in shape) Roof Floor Anterior wall Medial wall Lateral wall © Dr.N.Mugunthan
  12. 12. Roof:  Under surface of ant.part of body of corpus callosum Anterior wall:  Genu Floor:  Rostrum (upper surface) Medial wall:  Septum pellucidum Lateral wall:  Head of caudate nucleus Anterior horn (frontal horn) cont… © Dr.N.Mugunthan
  13. 13. Posterior horn (or) occipital horn  Backward extension from central part Situation: occipital lobe Extent: from splenium to occipital pole Presenting parts: (coronal section – roughly quadrangular or diamond in shape) Roof & Lateral wall Floor & Medial wall © Dr.N.Mugunthan
  14. 14. Roof , Lateral & floor : Tapetum (fibres from splenium of corpus callosum) Medial wall : 1. Bulb of post.horn (forceps major) 2. Calcar avis (calcarine sulcus) Posterior horn (or) occipital horn cont… © Dr.N.Mugunthan
  15. 15. Inferior (or) temporal horn Situation: temporal lobe Extent : from the meeting point of central part & post.horn to 2.5 cm behind the temporal pole  Largest & longest part  Collateral trigone Presenting parts: (coronal section –– transverse slit Roof Floor © Dr.N.Mugunthan
  16. 16. Roof: Lateral part – tapetum Medial part – tail of caudate nucleus & stria terminalis Floor: (Lateral to medial)  Collateral eminence (collateral sulcus)  Hippocampus  Choroid plexus Inferior or temporal horn cont… © Dr.N.Mugunthan
  17. 17. Choroid plexus & choroid fissure Present in central part & inferior horn of lateral ventricle Tela choroidea (bilaminal pial fold) Tela choroidea covering the ependyma Invaginated by fringe like tuft of blood vessels © Dr.N.Mugunthan
  18. 18. Choroid fissure- The line of invagination of choroid plexus into the lat.ventricle Derived from – ant.choroidal artery (branch from ICA & post.choroidal artery(branch from PCA) Choroid plexus & choroid fissure cont… © Dr.N.Mugunthan
  19. 19. Formation & circulation of CSF Formation: • choroid plexus Circulation : • lat.ventricle – third ventricle –fourth ventricle – subarachnoid space & central canal Absorption: • Arachnoid granulation - SSS © Dr.N.Mugunthan
  20. 20.  Ventricular system of brain can be visualized by CT Scan MRI Ventriculography Air encephalography (pneumoencephalography) © Dr.N.Mugunthan
  21. 21. © Dr.N.Mugunthan
  22. 22. Hydrocephalus © Dr.N.Mugunthan
  23. 23. In children Obstruction of interventricular foramen of Monro Obstruction of aqueduct of Sylvius Obstruction of foramen of Magendie & Luschka Tmt : 1. VP shunt 2. Venriculostomy In adult  Increased ICP Hydrocephalus cont… © Dr.N.Mugunthan
  24. 24. © Dr.N.Mugunthan Hydrocephalus cont…
  25. 25. © Dr.N.Mugunthan
  26. 26. VP SHUNT © Dr.N.Mugunthan
  27. 27. Summary • Development of ventricles • Parts of lateral ventricle • Relations of lateral ventricle • Communications • Formation & circulation of CSF • Applied anatomy © Dr.N.Mugunthan

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