What are the layers of the skin? - ANSWER epidermis, dermis, hypodermis
What are the 2 classifications of hair? - ANSWER Vellus and terminal hair
Pulse duration and fluence for fitz 1,2,3 - ANSWER -Use higher fluences
-Shorter pulse duration
Pulse duration and fluence for fitz 4,5 - ANSWE...
, -Nd: YAG 1064 nm (neodymium: yttrium-aluminum-garnet) (invisible light, all skin types, not the best but
safest for skin types 4 and 5)
What are the phases of hair growth - ANSWER anagen, catagen, telogen
Anagen - ANSWER -Active hair growth is occurring
-in early anagen, the follicle is growing and starting to deepen
-Hair is beginning to grow but has not yet reached the surface of the skin
-The mid-late anagen follicle has reached its maximum depth. The hair is fully visible terminal hair on the
surface of the skin.
-The hair shaft bulb is dark or black pigmented and very moist
-Dermal papilla directs and supports hair growth, enclosed by hair matrix
Catagen - ANSWER -Brief transitional stage
-Last only a few days to a few weeks
-Hair folicle seperates from the papilla
-The hair shaft bulb is lighter or brown pigmented and lighter
-Hair folicle shorts 1/3 of its former length
-In late catagen, the thin cord of epidermal cells attaching the dermal papilla to the shrunken hair reacts
upwards, followed by underlyin g hair papilla, which also movesz upwards.
Telogen - ANSWER -Resting or dormant period
-The papilla has detached from the follicle
- a "club" hair is terminal hair that has separated from the papilla that has risen to the top of the follicle.
eventually, it falls out
-The hair bulb has shrunken, is white, and consists of keratinized hair matrix cells
-Sometimes the follicle doesn't go through this phase.
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