1 / 26

NERVOUS SYSTEM

NERVOUS SYSTEM. Dr Iram Tassaduq. SPINAL CORD. Externally placed white matter Internally present butterfly shaped grey matter Central canal. GREY MATTER. Contain neuronal cell bodies Anterior horns contain motor neurons Posterior horn contain sensory neurons. WHITE MATTER.

tamra
Download Presentation

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. NERVOUS SYSTEM Dr Iram Tassaduq

  2. SPINAL CORD Externally placed white matter Internally present butterfly shaped grey matter Central canal

  3. GREY MATTER Contain neuronal cell bodies Anterior horns contain motor neurons Posterior horn contain sensory neurons

  4. WHITE MATTER Contains myelinated and unmyelinated axons travelling to and from spinal cord.

  5. CENTRAL CANAL

  6. CEREBELLUM

  7. MOLECULAR LAYER Contains few neurons but a large number of unmyelinated nerve fibers

  8. Granular layer Extremely cellular layer Axons bifurcate to synapse with dendrites of purkinje cells

  9. PURKINJE CELLS Single layer of flask shaped cells between molecular and granular layer. These are only efferent fibers from cerebellar cortex

  10. CEREBRUM

  11. CEREBRAL CORTEX

  12. Horizontal Layers of Cerebral Cortex From superficial to deep, the six layers are: 1] Molecular layer — fiber layer; apical dendrites & non-specific afferents; 2] Outer granular cell layer — interneurons for non-specific afferent input; 3] Outer pyramidal cell layer — small and medium cells; short association output 4] Inner granular cell layer — interneurons for specific afferent input 5] Inner pyramidal layer — large cells; projection & long association output 6] Multiform layer — variably shaped cells; projection & long association

  13. MOLECULAR LAYER • Contains dendrites and axons of cortical neurons making synapses with one another

  14. OUTER GRANULAR LAYER • Formed of densely populated pyramidal and stellate cells

  15. PYRAMIDAL LAYER • Dominated by pyramidal cells

  16. Inner granular layer • Formed of densely packed stellate cells

  17. GANGLIONIC LAYER • Large pyramidal cells and smaller number of stellate cells and cells of Martinoti make this layer.

  18. MULTIFORM LAYER • Wide variety of different morphological forms of cells are found in this layer. • It contains pyramidal cells and cells of Martinoti, as well as stellate cells.

More Related