LECTURE 4

Question 1

What is the name of the particle of light?

Answer 1

photon

Question 2

What is the wavelength range of visible light

Answer 2

400-800 nm

Question 3

Which wavelength leads to tanning

Answer 3

UV-B

Question 4

Where is melatonin produced?

Answer 4

Pineal gland

Question 5

What is MED?

Answer 5

Min. Erythemal dosage- way of determining where to put the laser

Question 6

What are the two types of lasers used in tissue healing?

Answer 6

HeNE and GaAs

Question 7

What colour is the HeNe laser?

Answer 7

red

Question 8

The MedX laser we used in lab is in which electromagnetic light zone?

Answer 8

Near infrared zone

Question 9

What is one proposed benefit of laser?

Answer 9

Increase local circulation and collagen production

Question 10

laser delivers energy in?

Answer 10

Joules/cm2

Question 11

Our laser is what classification?

Answer 11

3B

Question 12

What classification are the new HILT lasers?

Answer 12

Class 4

Question 13

The photons in our laser(LLT) are absorbed in this organelle?

Answer 13

mitochondria

Question 14

These proteins are produced in response to significant heat production and those are known as “chaperone proteins”

Answer 14

Heat Shock proteins?

Question 15

Many saunas used today generate heat from this part of the electromagnetic spectrum

Answer 15

Far infrared

Question 16

What is the frequency range of ELF

Answer 16

3-300Hz

Question 17

For any electromagnetic device to have an effect __________ must be absorbed

Answer 17

photon

Question 18

Which part of the EM spectrum forms the dividing line b/w ionizing and non-ionizing radiation?

Answer 18

UV-C

Question 19

UV non-visible?

Answer 19

180-400 nm

Question 20

infrared?

Answer 20

700-1400

Question 21

photon has _____ mass and travels at the speed of ____ in empty space

Answer 21

zero, light

Question 22

Absorption

Answer 22

ability to take-in light or radiant energy. Absorption is inversely related to penetration. In order for light to have a physiologic effect, it must be absorbed.

Question 23

Photoelectric Theory

Answer 23

The photoelectric effect is a process whereby light (photons) falling on a surface knocks electrons out of the surface.
Einstein

Question 24

SAD?

Answer 24

Seasonal Affective Disorder

Question 25

UV light treats what skin condition?

Answer 25

Psoriasis

Question 26

UVA can only work if taken with

Answer 26

a drug called psoralen PUVA

Question 27

Safety Considerations (UV)

Answer 27

Photosensitive patients should not be treated with UV
Patients with pellagra (niacin-deficiency type of dermatitis)
Dermatitis secondary to SLE
Active TB
Fever or acute diabetes
Some photosensitizing meds
Patient and clinician must wear protective eye gear

Question 28

Class 1/1M

Answer 28

CD player

Question 29

Class 2/2M

Answer 29

laser pointer

Question 30

Class 3R/3B

Answer 30

LLLT and CD and DVD writers

Question 31

Class 4

Answer 31

Surgical laser and *HILT (HPLT)

Question 32

Proposed Effects of LLLT

Answer 32

Increasing fibroblast activity
Stimulates production of Type I and Type III procollagen mRNA – assists in wound healing
Promotes angiogenesis+ lymphocyte proliferation
Increasing free radical production at mitochondria to drive a cellular metabolism effect at DNA
Increased ATP production

Question 33

Brainwave Frequencies, which wave is best for learning?

Answer 33

Alpha waves seem to be most important for learning