Brain

ppt from dr.fabie :)

1. BRAIN By: Dr. Pamela Josefina T. Fabie

2. END

3. BRAIN Part of the CNS contained within the skull Most complex and largest mass of nervous tissue in the body and contains billions of nerve cells MALE 1380 g FEMALE 1250 g Grows from birth up to 5 th year Weight decreases with old age

4. PARTS OF THE BRAIN

5. Largest portion 7/8 of the total weight Cerebral surface – cerebra l cortex, composed of gray matter Fold- gyrus ( gyri ) Intervening furrows- sulcus (if shallow); fissures (if deep) Innermost part – white matter CEREBRUM PARTS OF THE BRAIN

6. Parts of the Brain : Cerebrum FUNCTIONS:

7. LOBES: FRONTAL – motor functions and personality PARIETAL – sensory functions TEMPORAL – hearing and smell OCCIPITAL – vision ISLAND OF REIL – libido (sexual desires of man) Parts of the Brain : Cerebrum

8. PARTS OF THE BRAIN “Little Brain” Oval in shape DIVISIONS: Ant. Lobe – posture Post. Lobe – coordination of movements Flocculonodular lobe - equilibrium CEREBELLUM

9. Parts of the Brain : Cerebrum

10. Found between the forebrain and the hindbrain Concerned with motor coordination Connects the pons and the cerebellum with the cerebrum MIDBRAIN PARTS OF THE BRAIN

11. Parts of the Brain : Midbrain CEREBRAL PEDUNCLES – pair of cylindrical bodies made up of nerve fiber tracts which connect the forebrain with the hindbrain CORPORA QUADRIGEMA – 4 rounded nuclear masses a. SUPERIOR COLLICULI (Upper 2) – concerned with visual reflexes b. INFERIOR COLLICULI (Lower 2) – concerned with auditory reflexes SYLVIAN OR CEREBRAL AQUEDUCT or ITER - canal which connects the 3 rd and 4 th ventricles of the brain

12. Situated in front of the cerebellum between the midbrain and the medulla oblongata Bridge-like structure composed entirely of white matter linking the various parts of the brain Joins the two halves of the cerebellum Contains pneumotaxic canter – regulation of respiration PONS VAROLLI PARTS OF THE BRAIN

13. Extends from the pons above and is continuous with the spinal cord below Pyramidal in shape, being broad above and narrow below Nerve cells are grouped to form nuclei Origin of CN 6,7,8,9,10,11,12 MEDULLA OBLONGATA PARTS OF THE BRAIN

14. PARTS OF THE BRAIN: Medulla Oblongata FUNCTIONS: