Brain

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ppt from dr.fabie :)

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  • Pic of- Weighing scale or brain of f and m
  • Picture of brain no parts. real
  • Brain

    1. 1. By: Dr. Pamela Josefina T. Fabie
    2. 2.  BRAINo Part of the CNS contained within the skullo Most complex and largest mass of nervous tissue in the body and contains billions of nerve cells FEMALE MALE 1250 g 1380 g Weight Grows from decreases with birth up to old age 5th year
    3. 3. PARTS OF THE BRAIN
    4. 4.  Largest portion 7/8 of the total weight CEREBRUM Cerebral surface – cerebral cortex, composed of gray matter Fold- gyrus (gyri) Intervening furrows- sulcus (if shallow); fissures (if deep) Innermost part – white matter
    5. 5. Parts of the Brain : Cerebrum Seat of Mental Activities (attributed to higher centers) • Memory • Thinking • Reasoning • Moral sense • LearningFUNCTIONS: • Sense of responsibility Sensory Perception • Pain Initiation and • Temperature Control of • Touch Voluntary Muscular • Special senses Coordination
    6. 6. Parts of the Brain : CerebrumLOBES:1. FRONTAL – motor functions and personality2. PARIETAL – sensory functions3. TEMPORAL – hearing and smell4. OCCIPITAL – vision5. ISLAND OF REIL – libido (sexual desires of man)
    7. 7.  “Little Brain” Oval in shape CEREBELLUM DIVISIONS: Ant. Lobe – posture Post. Lobe – coordination of movements Flocculonodular lobe - equilibrium
    8. 8. Parts of the Brain :Cerebrum
    9. 9.  Found between the forebrain and the MIDBRAIN hindbrain Concerned with motor coordination Connects the pons and the cerebellum with the cerebrum
    10. 10. 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  SYLVIAN OR CEREBRAL rounded nuclear masses AQUEDUCT or ITER - canal a. SUPERIOR COLLICULI which connects the 3rd and 4th(Upper 2) – concerned with ventricles of the brain visual reflexes b. INFERIOR COLLICULI(Lower 2) – concerned with auditory reflexes
    11. 11.  Situated in front of the cerebellum between the midbrain and the medulla oblongata PONS VAROLLI 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
    12. 12.  Extends from the pons above and is continuous with the MEDULLA spinal cord below OBLONGATA 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
    13. 13. PARTS OF THE BRAIN: Medulla OblongataFUNCTIONS: 1. Organ of conduction for the passage of impulses between brain and spinal cord 2. Contains center for control of bodily functions • Cardiac inhibitory center – holds heart rate to slower rate through CN 10 • Vasoconsctrictor center – narrowing of lumen of the arteries • Respiratory center – controls rate of depth of respiration • Reflex center – sneezing, coughing, vomiting, winking, movements and secretions of the alimentary canal

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