1 / 38

The Neuron

The Neuron. Dendrites. Cell body (perikaryon, soma). Axon. Support cells (neuroglia). - more abundant than neurons. - more mitotic capability. Axon hillock. Gaps between Schwann cells called nodes of Ranvier. axolemma. Myelinated axons: sheath of Schwann and myelin sheath.

fala
Download Presentation

The Neuron

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. The Neuron Dendrites Cell body (perikaryon, soma)

  2. Axon

  3. Support cells (neuroglia) - more abundant than neurons - more mitotic capability

  4. Axon hillock

  5. Gaps between Schwann cells called nodes of Ranvier axolemma

  6. Myelinated axons: sheath of Schwann and myelin sheath one Schwann cell myelinates a single axon multiple Schwann cells needed to cover entire length of an axon

  7. Oligodendrocytes myelinate CNS axons (if myelinated)

  8. Central Nervous System 1. brain 2. spinal cord - ganglia associated

  9. 3. axons project to and from the body (CNS  PNS) 4. cell bodies in CNS except some in ganglia

  10. Transmission 1. innervation - cell body as integrator 2. action potentials (impulses) - axon hillock 3. myelin sheath

  11. Synapses - presynaptic terminal - postsynaptic terminal - neurotransmitters - ligand-gated ions channels on postsynaptic membrane

  12. Gap junction (nexus) - is an electrical synapse

  13. Nervous System Organization of neurons 1. circuits for stimulus-response 2. exchange of information

  14. Neuron signaling 1. afferent vs. efferent 2. interneurons 3. circuits

  15. Anencephaly

  16. Anencephaly

  17. Spina bifida occulta with meningocoele

  18. Spina bifida with failure of neuropore closure

  19. Cortical dysplasia

  20. Cortical dysplasia

More Related