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Therapeutic Modalities (Lecture) > Chpt. 4: *Light > Flashcards

Chpt. 4: *Light Flashcards

1
Q

What kind of light can cause harm?

A 
sun burn, 
cutting laser, 
infra red radiation
microwave, 
x-rays
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2
Q

What is the inverse relationship of light?

A

wavelength and frequency

-(if you have shorter wavelengths, you have larger frequency)

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3
Q

What are wavelengths measured in?

A

nanometers= visible light between 400-800 nm

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4
Q

*What are the two bands of UV light commonly used?

A

UV-A and UV-B

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5
Q

Define Reflection:

A

bouncing back of ray of light from energy source

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6
Q

Define Refraction:

A

Bending of energy; If the angle is not perpendicular, the light will be bent

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7
Q

Define absorption:

A

take-in light, or radiant energy

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8
Q

What is inverse relationship of absorption?

A

penetration

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9
Q

Who developed the Photoelectric Theory?

A

Einstein

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10
Q

What is Photoelectric theory?

A

a process whereby light falling on a surface knocks electrons out of the surface

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11
Q

What makes up all forms of light and is the elementary particle responsible for electromagnetic phenomena?

A

Photon

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12
Q

Define Photon

A

has no MASS, no charge and travels at speed of light

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13
Q

Why is full-spectrum light healthy for you?

A

(at noon)

-response reduces daily levels of melatonin and the stress hormone cortisol

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14
Q

*When daylight enters our eyes, it reaches the ____ and activates our ____ which is connected to our immune and nervous systems.

A
  • pineal gland

- Endocrine system

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15
Q

What gland produces melatonin which is supposed to be related to immune system and disorders?

A

Pineal Gland (shaped like a cone)

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16
Q

What is the funciton of melatonin? (3)

A
  1. regulates daily body rhythms
  2. regulates circadian rhythm
  3. slow aging process
  4. coordninates fertility
17
Q

What disorders is the pineal gland related to? (3)

A
  1. hypertension,
  2. epilepsy
  3. Paget’s disease.
18
Q

What dermatologic condition has UV light been used as for treatment ?

A

psoriasis

19
Q

UV-A has what type of wavelengths?

UV-B has what type of wavelengths?

A

Long wavelengths, low frequency

Short wavelengths, high frequency
-therefore greater absorption

20
Q

Absorption depends on what from the source?

A

depends on distance

21
Q

What two things need to be constance when using light as treatment?

A

intensity and distance

22
Q

What are some contraindications for UV light treatment?

A
  • photosensitive patients
  • fever
  • acute diabetes
23
Q

What does LASER stand for?

A

Light Amplification by the Stimulated Emission of Radiation

24
Q

What is Monochromatic ?

A

one wavelength= one colour

25
Q

What is coherence?

A

all photons travel in the same direction

26
Q

What is Beam divergence?

A

parallelism of the beam; the more parallel, the greater the concentration of energy

27
Q

How does a far infrared Sauna work?

What is it comparible to?

A

Gives off heat

-microwave

28
Q

What are (4) “BENEFITS” of infrared saunas that have never been proven?

A
  • detoxification
  • immune systmen enhancement
  • stress release
  • weight control
29
Q

What are some symptoms of SAD? (4)

(Seasonal Affective Disorder)?

A
  • depression
  • anxiety
  • extreme fatigue
  • carbs cravings
30
Q

Treatment for SAD?

A

light exposure to face

-PEMF

31
Q
  • What is Light measured in?

- “ “ Sound “ “ ?

A

Jules

watts

32
Q

What causes light?

A

movement of charged particles

33
Q

What is Light?

A

wavelengths and particle

34
Q

What do particles contain?

A

energy that travels in the form of waves

35
Q

What does MED stand for? How does it relate to tanning (UV-B)?

A

Minimal Erythemal Dose; threshold dose that may produce sunburn

Therapeutic Modalities (Lecture) (9 decks)

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