Psy 319 Unit 3

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Author:
brianatclark
ID:
239708
Filename:
Psy 319 Unit 3
Updated:
2013-10-23 16:44:07
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brain behavior
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psy 319
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  1. Extrafusal Muscle Fibers
    attached to the bone and deal with the tension of muscles
  2. 2 Types of Muscle Fibers
    Extrafusal and Intrafusal
  3. Intrafusal Muscle
    attached to intrafusal muscle and deal with the lengthening of muscles
  4. Golgi Tendon Organ
    motoring of muscle tension of the extrafusal muscle fibers
  5. Muscle Spindles
    monitoring of the length of the interfusal fiber
  6. Motor Neurons
    Alpha and Gamma Neurons; fire simultaneously
  7. Strychnine Poisoning
    Alpha Motor Nureon feedback loop gets knocked out; causes "lock-Jaw"
  8. Extrafusal Muscle Fibers
    are muscle fibers that connect to tendon to bone
  9. Cortical Motor Areas
    • ·         Prefrontal Association Ctx
    • o   Integration and planning center
    • ·         M2: Supplementary Motor Area
    • o   Planning of motor program
    • ·         M1: Primary Motor Area
    • o   Execution of program
    • ·         M2: Premotor Area
    • o   Active during execution for feeback –alteration
  10. BCI Components
    • 1.      Multi-electrode array to record activity
    • o   Resolution issues/ adaptation
    • 2.      Decoder algorithm for motor intention
    • o   Training program / adaptation
    • 3. effector apparatus for motor action
    • 4. sensory feedback
  11. Brian Motor System
    • o   Lumbar region 4-5 controls swinging stance in legs
    • o   Voluntary/ rhythmic Movement
    • o   Have a motor program that is reflex driven
  12. The Motor
  13. Cortical Motor Areas
    • o   Anosognosia
    • §  Being unaware of a disability
    • §  Right hemisphere M1 stroke
    • o   Limb Apraxia
    • §  Loss of skilled movement
    • §  Left Hemisphere
    • ·         Intraparietal sulcusmiddle frontal gyrus network
  14. Brian Motor Systems
    • o   Lumbar region 4-5 controls swinging stance in legs
    • o   Voluntary/ rhythmic Movement
    • o   Have a motor program that is reflex driven
  15. Cerebellum
    Tissue attached to the brainstem
  16. 3 major functions of the cerebellum
    • §  Posture & Balance
    • §  Timing Ballistic commands
    • ·         ballistic movement is very rapid firing sequence but it has timing of movement
    • §  Smoothing  the output/ execution
  17. 4 symptoms following damage of the cerebellum.
    • §  Ataxia (drunker sailers gate)
    • ·         Wide stance and a tendency to fall over
    • §  Asynergia
    • ·         Movement  not smooth it is  not performed very well
    • §  Dysmetria
    • ·         Calculating distance is hard to do
    • §  Terminal tremor
    • ·         Shaking at the end of a motor movement… at rest they are fine
  18. Creutzfeldt - jacob disease ( symptoms, Etiology, pathology, treatments)
    • ·         Symptoms
    • o   Choreiform movements
    • §  Looks like dancing movements
    • o   Cognitive / emotional / perceptual disturbances
    • §  Laughing sickness
    • §  Hylosinate
    • o   Death within 3-12 months
    • §  See it in mostly elderly
    • ·         Etiology
    • o   Begins with Nobel Laureate C. Gadjusek.
    • §  Fore Tribe and Kuru
    • ·         Elderly women and children
    • o   Ritualistic cannibalism
    • ·         Pathology: Laureate S. Prusner
    • o   Similar to BSE, Scrapie, CWD(cronic wasting dieses found in elk and deer)
    • o   Infectious agent: prions
    • §  Prions are twisted up protiens
    • §  Mis-folded w/o nucleic acid
    • ·         Treatments
    • o   None
  19. Hungtington's Disease (Symptoms, Etiology, Neuropathology, treatment)
    • §  Symptoms 1st described by George Huntington
    •      o  Heritability, chorea, dementia and death after 15-20 years
    • §  Etiology
    •      o   Autosomal dominant genetic disorder on chromosome #4
    •      o   Protein product = mutant Huntingtin (mHtt)
    • §  Neuropathology
    •      o   Wasting of caudate nuc.
    • §  Treatment
    •      o   None
    • §  Caudate is damaged and gets to much DA inhibition and gets excessive motor 
  20. Parkinson's Disease( treatment

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