Pons
By
Dr. Noura El Tahawy
drnosman@yahoo.com
http://www.slideshare.net/drnosman
Ventral view of
the brainstem in
situ.
Principal subdivisions and some important landmarks in the mature brain.
(B) ventral aspect. Cranial nerves are in...
A, Sagittal hemisection of the brain to show the third and fourth ventricles. Pia mater:
red; ependyma: blue. ...
Position of pons
Midsagittal section of the skull
Sagittal hemisection of the brain
Median sagittal section through the head and neck.
Sagittal MRI 'slice' of the living brain.
MRI scan of head in sagittal plane.
Horizontal section through the cerebellum and brain stem.
Ventral aspect
of the brain
stem.
(A) Anterior view of the brainstem.
The dorsal aspect of the brain stem. The floor of the fourth ventricle has been
exposed by cutting the cerebellar peduncl...
(B) Posterior view of the brainstem.
(B) Posterior view of
the brainstem.
The cranial nerve nuclei.
Transverse section through the brain stem at the level of the pontine-
mesencephalic junction.
Transverse section through the rostral pons.
Transverse section through the mid-pons at the level of the trigeminal
nerve.
Transverse section through the caudal pons.
Transverse section of the pons at level of facial
colliculus (Caudal pons)
Tegmentum of
pons directed
upward
cont...
Types of fibers in the basis pontis
Longitudinal Descending
Corticospinal
Corticobulbar
Corticopontine
Transverse f...
Tegmentum (Dorsal part) of the pons
By
Dr. Noura El Tahawy
Ascending tracts
Medial lemniscus
Spinal lemniscus
Trigeminal lemniscus
Lateral lemniscus
Medial longitudinal bundle
Transverse section of the pons at the level of facial colliculus
Medial lon...
Transverse section of the pons
The central course of the fibres of the facial nerve in a transverse section of the pon...
Cranial nerve nuclei in the Pons
Special visceral motor nuclei
Nucleus Site Cranial n. F...
Cranial nerve nuclei in the Pons
General somatic motor nuclei
Nucleus Site Cranial n. Fun...
Cranial nerve nuclei in the Pons
General somatic sensory nuclei
Nucleus Site Cranial n. Function
...
Cranial nerve nuclei in the Pons
Special somatic sensory nuclei
Nucleus Site Cranial Function
...
Non-cranial nerve nuclei in pons
Nucleus Site
Superior olivary nucleus Tegmentum of Pons
...
Blood Supply of the Pons
The subclavian arteries and their branches.
Arteries on the base of the brain injected with resin.
Vertebro-basilar system
The two vertebral arteries arise from the
subclavian arteries and ascend the neck in
the foramina...
The circulus arteriosus on the base of the brain
About a dozen pontine arteries (from basilar
artery) supply the full thickness of the medial
part of the pons
The anterio...
The arteries on the base of the brain.
Thanks
You can download this lecture from:
http://www.slideshare.net/drnosman
Pons
Pons
of 41

Pons

Lectures of neuro-anatomy for undergraduate medical students by Dr. Noura El Tahawy
Published on: Mar 4, 2016
Published in: Health & Medicine      
Source: www.slideshare.net


Transcripts - Pons

  • 1. Pons By Dr. Noura El Tahawy drnosman@yahoo.com http://www.slideshare.net/drnosman
  • 2. Ventral view of the brainstem in situ.
  • 3. Principal subdivisions and some important landmarks in the mature brain. (B) ventral aspect. Cranial nerves are indicated in yellow.
  • 4. A, Sagittal hemisection of the brain to show the third and fourth ventricles. Pia mater: red; ependyma: blue. B, Sagittal hemisection through the brain.
  • 5. Position of pons Midsagittal section of the skull
  • 6. Sagittal hemisection of the brain
  • 7. Median sagittal section through the head and neck.
  • 8. Sagittal MRI 'slice' of the living brain.
  • 9. MRI scan of head in sagittal plane.
  • 10. Horizontal section through the cerebellum and brain stem.
  • 11. Ventral aspect of the brain stem.
  • 12. (A) Anterior view of the brainstem.
  • 13. The dorsal aspect of the brain stem. The floor of the fourth ventricle has been exposed by cutting the cerebellar peduncles and removing the cerebellum.
  • 14. (B) Posterior view of the brainstem.
  • 15. (B) Posterior view of the brainstem.
  • 16. The cranial nerve nuclei.
  • 17. Transverse section through the brain stem at the level of the pontine- mesencephalic junction.
  • 18. Transverse section through the rostral pons.
  • 19. Transverse section through the mid-pons at the level of the trigeminal nerve.
  • 20. Transverse section through the caudal pons.
  • 21. Transverse section of the pons at level of facial colliculus (Caudal pons) Tegmentum of pons directed upward continuation of medulla oblongata Basilar part contain both longitudinal and transverse fibers intermixed with pontine nuclei
  • 22. Types of fibers in the basis pontis Longitudinal Descending Corticospinal Corticobulbar Corticopontine Transverse fibers: Pontocerebellar Cerebellopontine
  • 23. Tegmentum (Dorsal part) of the pons By Dr. Noura El Tahawy
  • 24. Ascending tracts Medial lemniscus Spinal lemniscus Trigeminal lemniscus Lateral lemniscus Medial longitudinal bundle
  • 25. Transverse section of the pons at the level of facial colliculus Medial long. fasciculus Facial colliculus Superior medullary velum Cavity of 4 th ventricle Superior cerebellar peduncle Vestibular nuclei Nucleus of abducent n. Inferior cerebellar peduncle Motor nucleus of facial n. Spinal nucleus and tract of trigeminal nerve MCP Lateral lemniscus Transverse pontine fibers Reticular formation Facial nerve Abducent nerve Dicussation of Long. Fibers in basis pontis Trapezoid body
  • 26. Transverse section of the pons The central course of the fibres of the facial nerve in a transverse section of the pons, viewed from the rostral aspect.
  • 27. Cranial nerve nuclei in the Pons Special visceral motor nuclei Nucleus Site Cranial n. Function Motor nucleus of Pons V Masticatory muscles trigeminal n. Motor nucleus of Pons V Facial muscles, facial n. platysma, posterior belly of digastric, stylohyoid, stapedius muscles
  • 28. Cranial nerve nuclei in the Pons General somatic motor nuclei Nucleus Site Cranial n. Function Nucleus of Pons VI Lateral rectus abducent n. General visceral motor nuclei Nucleus Site Cranial Function n. Superior salivatory Pons VII Submandibular, nucleus sublingual and lacrimal glands
  • 29. Cranial nerve nuclei in the Pons General somatic sensory nuclei Nucleus Site Cranial n. Function Mesencephalic Midbrain V Proprioception nucleus of (in rostral of head trigeminal n. Pons) Main sensory Pons V Tactile nucleus of sensation of trigeminal head Spinal nucleus of Medulla V Pain & trigeminal (in caudal Temperature of Pons) head
  • 30. Cranial nerve nuclei in the Pons Special somatic sensory nuclei Nucleus Site Cranial Function n. Cochlear Pons and VIII Sense of hearing nuclei medulla (dorsal &ventral) Vestibular Pons and VIII Sense of nuclei medulla equilibrium (Superior, medial, lateral, inferior)
  • 31. Non-cranial nerve nuclei in pons Nucleus Site Superior olivary nucleus Tegmentum of Pons Pontine nuclei Basilar pons
  • 32. Blood Supply of the Pons
  • 33. The subclavian arteries and their branches.
  • 34. Arteries on the base of the brain injected with resin.
  • 35. Vertebro-basilar system The two vertebral arteries arise from the subclavian arteries and ascend the neck in the foramina transversaria of the upper six cervical vertebrae. They enter the skull through the foramen magnum and unite at the lower border of the pons to form the basilar artery .The basilar artery ascends to the upper border of the pons and divides into two posterior cerebral arteries
  • 36. The circulus arteriosus on the base of the brain
  • 37. About a dozen pontine arteries (from basilar artery) supply the full thickness of the medial part of the pons The anterior inferior cerebellar and superior cerebellar arteries (both arise from basilar artery) supply the side of the pons before giving branches to the cerebellum .
  • 38. The arteries on the base of the brain.
  • 39. Thanks You can download this lecture from: http://www.slideshare.net/drnosman

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