Showing posts with label neuroanatomy. Show all posts
Showing posts with label neuroanatomy. Show all posts

Monday, April 5, 2010

-Brown-Séquard syndrome.

Brown-Séquard syndrome.
(Hemisection of spinal cord.)
*Aetiology:-
lesion in one side of the spinal cord as:-

  • Stab wound.
  • Disc prolapse.
  • D.S.
  • Tumor.

Saturday, April 3, 2010

- Horner's syndrome.

Horner's syndrome
*Def:-
It is a clinical syndrome caused by damage to the sympathetic nerve supply to head and neck.
*synonymes:-
  • Bernard-Horner syndrome
  • oculosympathetic palsy.
*Causes:-
Due to lesion or compression of one side of the cervical or thoracic sympathetic chain which generates symptoms on the ipsilateral (same side as lesion) side of the body:-

Friday, September 5, 2008

- Cranial nerves.

**There are 12 cranial nerves...

  1. I      Olfactory nerve (purely sensory).
  2. II     Optic nerve  (purely sensory).
  3. III    Occulomotor nerve  ( Purely motor).
  4. IV    Trochlear  nerve  ( Purely motor).
  5. V     Trigeminal nerve ( Mixed ).
  6. VI    Abducent. ( Purely motor).
  7. VII   Facial  ( Mixed ).
  8. VIII  Auditory nerve  (Vestibulocochlear) (purely sensory).
  9. IX    Glossopharyngeal  ( Mixed ).
  10. X     Vagus  ( Mixed ).
  11. XI    Spinal Accessory.( Mixed ).
  12. XII   Hypoglossal .( Mixed ).

** Important notes:-
- The largest cranial nerve .... CN V (Trigeminal).
- Cranial nerves responsible for eye movements are
  •    III (Oculomotor)
  •    IV (Trochlear)
  •    VI (Abducens)

- The longest cranial nerve ....CN X (Vagus) which reaches from the medulla to the digestive and urinary organs.


- CN I and II are  attached to Cerebrum.


See you ,
Ibrahim

Wednesday, August 20, 2008

- Three in nervous system.

* Brain is composed of three parts :-
  1. Cerebrum.
  2. Cerebellum.
  3. Brain stem.

* Brain stem is composed of three parts :-
  1. Midbrain.
  2. Pons.
  3. Medulla oblongata.
To be continued ....