Please enable JavaScript.

Coggle requires JavaScript to display documents.

Nervous system (crainial nerves (Olfactory I (sensor smell), optic II…

- - - - A disorder of the nervous system in which the myelin is destroyed
        
        affects 200,000-400,000 people in the united states alone
        
        brain, spinal cord and optic nerves are involved
        
        Like a cut electrical wire
        
        Bare spots where myelin is missing
        
        symptoms differe from patient to pt
        
        1 more item...
    - - autoimmune attack on the periphreal mylin
        
        Three phases
        
        recoverable
  - - - common before the 50's when a vaccine came about
        
        many have mild respitory ilness only lasting a few days
        
        not very many aquire the paralytic form
        
        no treatment
  - - - accending muscle weakness
        
        treatment ot pt surgery medications
  - - - many are violencxe or alciohal related
        
        Mild
        
        concussion
        
        contussion
        
        severe hemmorage
    - - cerebralvasscular accident Link Title
        
        stroke Caused by a blockage to the brainm eithrt by a hemmorege or blood clots
        
        brain tissue may die
        
        symptoms depend on patient but may include headache diozziness loss of vision
  - - - most commonly between dura and skull
- - - - neurons are located in spinal cord and brain
- - - - metabolic and structual support cells that hold neurons and blood vessels together
    - - can attack microbes and remove dirt
    - - do the job of epitheal cells
    - - hold nerve fibers together and make myelin
  - - - recive info from enviroment
    - - space between axon and reciving cell
    - - generates and sends signal
      - classification
        
        bipolar
        
        one axon and one dendrite
        
        multipolar
        
        one axon many dendrites
        
        unipolar
        
        one process
    - - connects to reciving cell
    - - imput
    - - excitable cells
        
        carries small electrical charge when stimulated
        
        all three types of muscles are excitable cells
        
        sodium gates open
      - action potentials
        
        cell that is not excited
        
        depolarized
        
        cell that is resting
        
        when sodium gates open up they allow sodium ions to travel across the membrane
        
        repolarization
        
        when cells become negative again
        
        when a cell over shoots it is called olarized
        
        these changes are known as action potential
        
        all or none
      - local potential
        
        use their ability to generate electricity to send recive and interpret
        
        hammering and you hit your thumbwhich stimulates the dendrites in your thumb the sodium gates open up and flows into the dendrites if you hit your thumb softly not as big of a reaction
      - impulse conduction
        
        presence of myelin sheath and diameter of axon
        
        myelin is lipid insulation formed by oliogodendrites in cns
        
        schwan cells
- - - - gyrus
        
        precentral
        
        postcentral
- - - - controls voulebtary system
        
        when you decide to move the movements are planned in the prefrontal cortex and premotor cortex in the frontal lobe the plan is then sent to the primary motor cortex
        
        orders are then sent to the spinal cord
  - - - gets information from planned and actual movement
        
        compares them
        
        function is still a mystery
        
        movement would be inaccurate without
    - - movment plan is procesed by the motor coordination loop
        
        moves to the spinal cord and brain stem by
        
        corticospinal
        
        DIRECT PATHWAYS
        
        corticobular tracts
      - send orders from brain to motor neurons
    - - thalmus basal nucluei amd cerebellum
        
        movement is fine tuned
        
        fundemental