The brain has three main parts - the brain stem, cerebellum, and cerebrum. The brain stem connects the brain to the spinal cord and controls involuntary functions. The cerebellum coordinates movement and balance. The largest part, the cerebrum, is divided into four lobes that control functions like conscious thought, sensory processing, vision, and sound. The spinal cord extends from the brain through the backbone and links the brain to the peripheral nervous system, handling reflex actions.

1. THE BRAIN AND THE SPINAL CORD

2. The Human Brain

3. FUNCTIONS OF THE BRAINIT RECEIVES MESSAGES FROM AND SENDS MESSAGES TO ALL ORGANS AND TISSUES OF THE BODYIT CONTROLS BOTH VOLUNTARY & INVOLUNTARY ACTIVITIESTHE BRAIN GIVES US THE ABILITY TO LEARN, TO REASON AND TO FEEL

4. 3 MAIN PARTS:BRAIN STEMCEREBELLUMCEREBRUM

5. 1. BRAIN STEMTHE LOWEST SECTION OF THE BRAIN WHICH CONNECTS IT TO THE SPINAL CORDIT HAS 3 PARTS:MedullaPonsMidbrain

6. 2. CEREBELLUMIS AT THE BACK OF THE BRAIN STEM AND IS LINKED TO IT BY NERVE TRACTSIT IS CONCERNED WITH THE MAINTENANCE OF POSTURE AND BALANCE, AND THE COORDINATION OF MOVEMENTS

7. 3. CEREBRUMLARGEST PART OF THE BRAINHAS 2 HEMISPHERES SEPARATED BY A GROOVEIS DIVIDED INTO 4 SECTIONS OR LOBES

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

13. Frontal lobe—conscious thought; damage can result in mood changesParietal 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 processingOccipital lobe—sense of sight; lesions can produce hallucinationsTemporal 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 CORDIs 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 FUNCTIONSIT IS THE LINK BETWEEN THE PERIPHERAL NERVOUS SYSTEM (PNS) AND THE BRAIN.