1 / 28

CENTRAL NERVOUS SYSTEM

CENTRAL NERVOUS SYSTEM. Hemakumar. NERVOUS SYSTEM. CNS. PNS. Brain Spinal Cord. Somatic-Voluntary Autonomous - Involuntary. NEURON. STRUCTURAL AND FUNCTIONAL UNIT OF N.S. THERE ARE OVER 100 BILLION NEURONS IN N.S. NEUROGLIAL CELLS. ASTROCYTES. OLIGODENDROCYTE. MICROGLIAL CELLS.

freya
Download Presentation

CENTRAL NERVOUS SYSTEM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CENTRAL NERVOUS SYSTEM Hemakumar

  2. NERVOUS SYSTEM CNS PNS Brain Spinal Cord Somatic-Voluntary Autonomous - Involuntary

  3. NEURON STRUCTURAL AND FUNCTIONAL UNIT OF N.S. THERE ARE OVER 100 BILLION NEURONS IN N.S.

  4. NEUROGLIAL CELLS ASTROCYTES OLIGODENDROCYTE MICROGLIAL CELLS

  5. SOMATIC NERVES Vs VISCERAL NERVES

  6. G R A Y MATTER vs W H I T E MATTER

  7. White Matter vs. Gray Matter Both the spinal cord and the brain consist of • white matter = bundles of axons each coated with a sheath of myelin • gray matter = masses of the cell bodies and dendrites - each covered with synapses

  8. 3 TYPES OF NEURON FUNCTIONS

  9. MOTOR vs SENSORY AFFERENT vs EFFERENT

  10. CABLE LIKE ARRANGEMENT

  11. Electrical signal recording

  12. NEURO TRANSMISSION

  13. BRAIN – SOME FUNCTIONAL AREAS

  14. The brain • receives sensory input from the spinal cord as well as from its own nerves (e.g., olfactory and optic nerves) • devotes most of its volume (and computational power) to processing its various sensory inputs and initiating appropriate - and coordinated - motor outputs.

  15. REGIONAL REPRESENTATION IN THE BRAIN

  16. LATERALITY OF BRAIN FUNCTION • RIGHT AND LEFT BRAIN RIGHT HEMISPHERE: SPATIAL ABILITIES LEFT HEMISPHERE: MUSICAL ABILITY • GENDER DIFFERENCES MALES TEND TO EXHIBIT MORE LATERALIZATION OF SPECIFIC TASKS FEMALES USE BOTH HEMISPHERES MORE SYMMETRICALLY

  17. The spinal cord • conducts sensory information from the peripheral nervous system (both somatic and autonomic) to the brain • conducts motor information from the brain to our various effectors skeletal muscles cardiac muscle smooth muscle glands • serves as a minor reflex center

  18. All the sensory axons pass into the dorsal root ganglion where their cell bodies are located and then on into the spinal cord itself. All the motor axons pass into the ventral roots before uniting with the sensory axons to form the mixed nerves.

  19. TRACTS – ASCENDING AND DESCENDING

  20. AUTONOUMOUS NERVOUS SYSTEM

  21. Mapping the Functions of the Brain • Histology • The Electroencephalograph (EEG) • Damage to the Brain • CT = X-ray Computed Tomography • PET = Positron-Emission Tomography • MRI = Magnetic Resonance Imaging

  22. EEG SIGNALS - TIME TESTED

  23. MRI of brain

  24. FUNCTIONAL MRI

  25. PET SCAN IMAGES

  26. THANK YOU

More Related