sensory - Quiz 7

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sensory - Quiz 7
2013-12-12 17:53:40
sensory nervous system vision ear taste smell

sensory nervous system: vision ear
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  1. touch, temperature, proprioception (body position), and nociception (pain).
    What are the common somatic sensations?
  2. fine touch, proprioception (body position), kinesthesia (awareness of body position), vibration
    On the spinal cord, what is associated with the dorsal column system?
  3. pain & temperature
    On the spinal cord, what is associated with the spinothalmic system?
  4. fine motor control
    On the spinal cord, what is associated with the pyramidal or corticospinal system?
  5. postcentral gyrus
    What region on brain gives us sense of body?
    • corticospinal (aka pyramidal) - fine motor control
    • dorsal column - fine touch, vibration, kinesthesia
    • spinthalamic - pain & temperature
  6. it's receptors are linked to unconscious reflexes (no cortex)
    pain (referred)
    What are viseral sensations?
  7. occurs when sensory receptors change their sensitivity to the stimulus. This phenomenon occurs in all senses, with the possible exception of the sense of pain.
    What is sensory adaptation?
  8. *
    harder: more output/results
    softer: less output/results
    constant: less output/results
    • *
    • In adaptation, when you push on the nerve ending, you get action potentials.... describe what happens when you push
    • harder:
    • soft:
    • constant:
  9. Vision -  eye structure
  10. Vision -  eye structure
  11. *
    • *
    • what is the fluid in the posterior CHAMBER of the eyeball?
  12. Vitreous humor --> posterior cavity
    Aqueous humor --> anterior cavity

    *CAUTION.  Anterior Cavity is further divided into two sections called CHAMBERS
    What are the two types of liquid found in eyeball?  Where is each located?
  13. image formation
  14. Distant vision= lens is flattened
    Close vision= lens bluges
    How does the lens accommodates for distant vision? How does lens accommodates for close vision?
  15. accommodation is the eye adjusts to near vision.  the lens will curve/bulge more
    • *
    • what is accommodation? and what happens to the lens?
  16. rods and cones
    retinal layers consists of?
  17. Low light vision

    Rod=low light vision, dim vision
    (low resolution)

    They are active in the dark, light turns them off, signals on optic nerve
    Rods are used for what type of vision?
  18. color and acuity

    Cone= color and acuity
    (high resolution)

    Needs light, outnubmered by rods (18 rods to 1 cone)
    Cones are used for what type of vision?
  19. NO
    is the retina uniform?
  20. (AKA the optic nerve head) is the location where ganglion cell axons exit the eye to form the optic nerve. There are no light sensitive rods or cones to respond to a light stimulus at this point. This causes a break in the visual field called "the blind spot"
    what is the optic disc?
  21. It is an oval-shaped highly pigmented yellow spot near the center of the retina.  Has MORE CONEs than rods.

    Near its center is the fovea- it contains the largest concentration of cone cells in the eye and is responsible for central, high resolution vision. NO RODS IN FOVEA
    What is the macula of the eye?  What is in it's center?
    • Visual pathway:
    • eyes--optic nerve--optic chiasma--optic tracs (both sides)--superior colliculus--part of thalamus (lateral geniculate body of thalamus) --occipital lobe
    (all other eye nerves are motor)
    name the nerve that sense/play a part with vision
  23. tympanic membrane!  It vibrates, it gives us the sounds.
    what is another name of the ear drum?  What is it primarily responsible for?
  24. Inner most....
    staples (stirrup)
    incus (anvil)
    malleus (hammer)        
    to Outer most..
    What are the bones in the middle ear?
    What are the two main parts of the internal ear (inner ear)?
  26. Scala Vestibula & Scala Tempani, sandwhiched inbetween is Cochlear Duct

    Cochlear Duct=endolymph
    Scalas Vestibula and Tempani=perilymph
    What are the three sections of the cochlea?
  27. Hair cells are located in the Organ of Corti ON THE BASILAR MEMBRANE
  28. stimulated hair cell releases neurotransmitter leading to signal on cochlear nerve
  29. Eustachian tube
    What is the tube that connects the middle ear to the throat?
  30. ear drum vibrates, passes along to stapes, then through oval window, fluid vibrates, basilar membrane and hairs start vibrating

    passes on to vestibularcochlear Nerve--> thru medulla, midbrain--> inferior colliculus-->thalamus-->temporal lobe
    auditory pathway
  31. helps with balance.  the utricle, saccule, and semicircular canals
    what does the vestibule do?  What are the three main parts/components?
  32. Utricle and Saccule.

    when no change in acceleration hair "normalizes" and you don't sense speed/movement anymore
    What detects head movement? [head movement= forward/back, side to side, up/down, awareness of gravity]
  33. Semicircular canals
    What detects head rotation? (yes and no movement)
  34. VII - facial
    IX - glosspharnygeal
    X - vagus
    What nerves play a part in taste sensation?
  35. Body--> post central gyrus
    Ear--> temporal
    Eye--> occipital
    • What lobes/parts of the brain do each of the following connect/corresponds to??
    • Body
    • Ear
    • Eyes
  36. More K+(potassium)  = Endolymph

    More Na+ (sodium) = Perilymph
    Which fluid has more K+?  Which one has more Na+?