phys 215Neurophysiology__Part_2__B.ppt

phys 215Neurophysiology__Part_2__B.ppt -...

Info icon This preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Neurophysiology (Part 2)
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Part 1 Review Cell Body and dendrites Graded potentials add up Axon Hillock Generation of action potential 3 Phases Axon Conduction Contiguous (unmyelinated) Saltatory (myelinated)
Image of page 2
Myelinating Cells What is myelin? Lipid covering Schwann cells – individual wraps Peripheral nervous system Oligodendrocytes Central nervous system
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Schwann cells Single axon Phagocytes Regenerative Growth cones If damaged, neurons can come back
Image of page 4
Oligodendrocytes Multiple axons Growth inhibition Only in central nervous system Unable to regrow if damaged Node of Ranvier
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
How can we promote growth? Block inhibitors Chemical compounds could block the inhibitors Risk of cancer Nerve grafts with Schwann cells Neuronal stem cells Adult stem cells are better than fetal stem cells
Image of page 6
Multiple Sclerosis Affects brain and spinal cord (central nervous system) progressive damage to the myelin Which type of myelinating cell affected? – schwann cells The cause of MS is unknown. repeated episodes of inflammation of nervous tissue episodes occur when the body's own immune cells attack the nervous system HHV-6 Affects ability to under go salutatory conduction Peripheral Nervous system attack Guillian barre 90% can recover do to regrowth Causes: viral, vaccination
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Axon Terminal
Image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern