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The brain and the spinal cord
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The brain and the spinal cord

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  • 1. THE BRAIN AND THE SPINAL CORD
  • 2. The Human Brain
  • 3. FUNCTIONS OF THE BRAIN
    IT RECEIVES MESSAGES FROM AND SENDS MESSAGES TO ALL ORGANS AND TISSUES OF THE BODY
    IT CONTROLS BOTH VOLUNTARY & INVOLUNTARY ACTIVITIES
    THE BRAIN GIVES US THE ABILITY TO LEARN, TO REASON AND TO FEEL
  • 4. 3 MAIN PARTS:
    BRAIN STEM
    CEREBELLUM
    CEREBRUM
  • 5. 1. BRAIN STEM
    THE LOWEST SECTION OF THE BRAIN WHICH CONNECTS IT TO THE SPINAL CORD
    IT HAS 3 PARTS:
    Medulla
    Pons
    Midbrain
  • 6. 2. CEREBELLUM
    IS AT THE BACK OF THE BRAIN STEM AND IS LINKED TO IT BY NERVE TRACTS
    IT IS CONCERNED WITH THE MAINTENANCE OF POSTURE AND BALANCE, AND THE COORDINATION OF MOVEMENTS
  • 7. 3. CEREBRUM
    LARGEST PART OF THE BRAIN
    HAS 2 HEMISPHERES SEPARATED BY A GROOVE
    IS DIVIDED INTO 4 SECTIONS OR LOBES
  • 8.
  • 9.
  • 10. THALAMUS– CONSISTS OF TWO EGG-SHAPED MASSES OF NERVE TISSUE WHICH RECEIVE MESSAGES FROM THE SENSORY NEURONS AND SEND THEM TO SPECIFIC AREAS IN THE CEREBRUM WHERE THEY ARE INTERPRETED.
    HYPOTHALAMUS – LIES BETWEEN THE THALAMUS AND THE PITUITARY GLAND
  • 11.
  • 12.
  • 13. Frontal lobe—conscious thought; damage can result in mood changes
    Parietal lobe—plays important roles in integrating sensory information from various senses, and in the manipulation of objects; portions of the parietal lobe are involved with visuospatial processing
    Occipital lobe—sense of sight; lesions can produce hallucinations
    Temporal lobe—senses of smell and sound, as well as processing of complex stimuli like faces and scenes.
  • 14. Brain in the flesh
  • 15. THE SPINAL CORD
    Is a part of the CENTRAL NERVOUS SYSTEM.
    Begins at the base of the skull and extends throughout most of the backbone, or vertebral column
  • 16. Structure
  • 17. MAIN FUNCTIONS
    • IT IS THE LINK BETWEEN THE PERIPHERAL NERVOUS SYSTEM (PNS) AND THE BRAIN.
    • 18. HANDLES SOME INFORMATION COMING FROM THE SENSES AND PROVIDE MOTOR RESPONSES THAT DO NOT COME FROM THE BRAIN. THIS IS CALLED A REFLEX ACTION.