Central Nervous System (exam 2)

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Central Nervous System (exam 2)
2015-04-08 02:43:36
Physiology lecture
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  1. Cortex
    cortex superficial surface (grey
  2. Corpus callosum
    Connects the two hemispheres for communication (white)
  3. Gyri and sulci
    • Gyri: Ridges
    • Sulci: shallow groves
  4. 4 lobes of the brain
    • Frontal
    • Temporal
    • Parietal 
    • Occipital
  5. Frontal Lobe
    • Coordinates movements (skeletal muscle)
    • Reasoning
    • Emotion
  6. Temporal Lobe
    • Receives and monitors auditory stimuli
    • Memory
    • Speech
    • Primary motor
  7. Parietal Lobe
    • Receives and monitors general somatic sensory information (touch, pain, temp) 
    • Primary sensory cortex
  8. Occipital Lobe
    Receives and integrates visual information
  9. Cerebellum
    Automatic control of posture coordination of body movements
  10. Diencephalon
    • Links cerebral hemispheres to the rest of the CNS
    • Includes thalamus and hypothalamus
  11. Thalamus
    Relays and processes sensory information
  12. Hypothalamus
    Roles in emotion, regulating temp, H20 balance, metabolism, hormones, Day-Night cycles
  13. Brain stem
    • Midbrain: process visual information
    • Pons: Regulates breathing
    • Medulla Oblongata: Regulates heart rate blood pressure, breathing, swallowing, vomiting
  14. Right brain
    • Function: Movement and sensory perception for left side of body
    • Associated with creativity, music, spatial orientation, dream imagery, intuition
  15. Left Brain
    • Function: Movement and sensory information for the right side of the body
    • Associated with logic, analytical processing, language, math
  16. How sensory information converts
    Stimuli -> impulse -> brain
  17. What is perception
    Conscious interpretation of the external world
  18. Function of sensory receptors
    • Detect specific modalities from environment -> impulse 
    • Modality: different energy forms
    • (photons, chemicals, sound waves, pressure, temp)
  19. Law of specific nerve energies
    Each receptor is specific for a particular modality -> adequate stimulus modality that receptor responds best
  20. 4 classes of sensory receptors
    • Photoreceptors
    • Chemoreceptors 
    • Thermoreceptors
    • Mechanoreceptors