Nervous System

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Nervous System
2013-11-10 19:25:44

Nervous system
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  1. Nervous System Functions
    • 1.Sensory Function
    • 2.Intergrative Function
    • 3. Motor Function
  2. Sensory Function
    • Afferent Neurons
    • Sends signals to the CNS via spinal nerves
  3. Intergrative Function
    • Interneurons
    • Intergrates sensory information by analyzing and storing it
  4. Motor Functions
    • Efferent Neurons
    • Information from the brain and spinal cord is sent out to muscles or glands
  5. Four major parts of the brain
    • cerebrum
    • diencephalon
    • cerebellum
    • brain stem
  6. Right hemisphere
    music, face recognition, visual imagery, spatial abilities
  7. Left
    language, logic, reason
  8. Lobes
    • FrontalĀ 
    • Parietal
    • Temporal
    • Occipital
    • Insula
  9. Frontal
    reasoning, planning, part of speech and movement, emotions, problem solving
  10. Parietal
    perception of stimuli related to touch, pressure, temperature, pain
  11. Temporal
    perception and recognition of auditory stimuli and memory
  12. Occipital
    Many aspects of vison
  13. Insual
    Integrates autonomic information, associated to visceral function
  14. Organization of Cerebellum
    • 2 cerebellar hemispheres
    • cerebellar cortex(grey matter)
    • Arbor Vitae(white matter)
  15. Major Dural folds
    • falx cerebri
    • falx cerebelli
    • tentorium cerebelli
  16. Cranial Meninges
    • Dura Mater
    • Arachnoid Mater
    • Pia Mater
  17. Arachnoid Mater
    • contains spaces for blood vessels
    • Subarachnoid space is filled with CSF
  18. Pia Mater
    thin protective layer of tissue which directly covers nerves and neuroglia
  19. Primary Motor Area
    Location: Precentral gyrus in frontal lobeFunction: Voluntary activation of skeletal muscles
  20. Primary Somatosensory
    Location: Post Central gyrus in parietal lobeFunction: receives sensory impulses from sensory receptors responding to touch, temp and proprioception
  21. Primary Visual Area
    Location: Medial portion of occipital lobeFunction: Nervous signals traveling along the optic nerve provide information about color, shape and movement of visual stimuli
  22. Primary Auditory Area
    Location: Superior portion of temporal lobeFunction: Receives impulses arising from the vestibulocochlear nerve which provide info. on the basic characteristics of sound
  23. Auditory association Area
    Location: Temporal lobe, inferior and posterior to the primary auditory area: typically found on left temporal lobe onlyFunction: interpretation and recognition of sound; determines if sound is speech, music or noise
  24. Wernike's Area
    Location: temporal lobe, posterior to primary audiry area on left lobeFunction: Interprets the meaning of speech
  25. Broca's area
    Location: Frontal lobe, left sideFunction: controls the activity of muscles of the vocal cord to facilitate speech
  26. Basal Nuclei
    • help initiate and terminate movements
    • suppress unwanted movements
    • regulate muscle tone
    • control subconscious contractions of skeletal muscles
  27. Nucleus
    cluster of neuronal cell bodies in the CNS
  28. Ganglion
    is a cluster of neuronal cell bodies in PNS
  29. Tract
    bundle of axons in CNS
  30. Nerve
    bundle of axons in PNS
  31. Epithalamus
    • Located: superior and posterior to the thalamus
    • 1) Pineal gland- contributes to setting the biological clock
    • 2) habenular nuclei- involved in emotional responses to odors
  32. Thalamus
    • Relay station for sensory and motor info
    • Crude interpretation of touch, temp, pain, pressure
    • Forms walls of 3rd ventricle
    • Organized into 7 groups of nuclei
  33. Hypothalamus
    • Controls and integrates the activity of the autonomic nervous system and pituitary gland
    • Controls Homeostasis
    • Hypothalamus is the link between the nervous system and endocrine system