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Properties of the Hair and Scalp
Transcript of Properties of the Hair and Scalp
Use clarifying shampoos.
Eat a well-balanced diet.
Shampoo regularly and frequently.
Avoid strong soaps, detergents, or products with high alcohol content.
Oily Hair and Scalp
Hair appears dull, dry, lifeless.
Avoid frequent shampooing, strong soaps, detergents, or products with a high alcohol content.
Dry Hair and Scalp
Hair stream (hair flowing in same direction)
Whorl (hair forms in a circular pattern)
Cowlick (tuft of hair that stands straight up)
Testing for Porosity
Low – thin hair
Medium – average thickness
High – dense or thick hair
Average: 2,200 hairs per square inch
Testing Hair Texture
Pityriasis capitis simplex
Minoxidil (topical treatment)
Finasteride (oral treatment)
Hair Loss Treatments
Temporary hair loss at conclusion of pregnancy
Growth cycle returns to normal within one year after delivery of baby.
Sudden loss in round or irregular patches.
Affects five million people in the United States
Immune system attacks hair follicles
Begins with small bald patches
Occurs in males and females of all ages and races
No sign of scalp inflammation
No obvious signs of skin disorder
Negative social and emotional effects; preoccupation with baldness; effort made to conceal
Devastation; anxiety; feelings of helplessness and unattractiveness
Emotional Impact of Severe Hair Loss
Less personally likeable
Older by five years
Hair Loss Perceptions
Natural shedding: 35 to 40 hairs per day
Abnormal loss called alopecia.
Androgenetic alopecia, alopecia areata, postpartum alopecia
Clipping, cutting makes hair grow faster.
Scalp massage increases growth.
Gray hair is coarser and more resistant.
Natural curl determined by race.
Sleeping with wet hair causes scalp fungus.
Hair grows faster on different parts of the head.
Wearing tight Braids, Pony tails or Buns Causes Baldness.
Hair Growth Myths
Melanin (tiny grains of pigment)
Eumelanin (provides brown/black color)
Pheomelanin (provides yellow to red/ginger color)
Gray hair (absence of melanin)
Bonds of the Hair
Keratinization: cell maturation
90 percent protein: amino acids composed of five elements
Chemical Composition of Hair
Trichology: the scientific study of hair, its diseases, and its care
Integumentry: system includes hair, skin, nails
Hair: slender, threadlike protein filament that is an appendage of the scalp and body
–Hair root: lies beneath the scalp
–Hair shaft: projects above the scalp
Properties of the
Hair and Scalp
What four factors should be considered in hair analysis?
Name and describe the three layers of the hair
Testing for elasticity
Low porosity =resistant
Porosity- The ability of the hair to absorb moisture.
Hair Analysis and Texture
Furuncle or boil - Bacteria infection
Carbuncle -inflammation of the subcutaneous
tissue that is caused by staphylococci.
Scabies (itch mite)
Pediculosis capitis (head lice)
Monilethrix Beeded- hair that breaks between the nodes
Fragilitas crinium-Hair that splits any where on the strand
Anagen (growing phase) 90% 2-6 years
Catagen (transition phase)14days
Telogen (resting phase)10%
The entire growth cycle repeats
itself every four to five years
Growth Cycles of Hair
Extremely curly hair
Linked like pop beads
Peptide or end bonds
Units of structure that build
Arrector pili Muscle
Structure of Hair Root
Describe the hair growth process.
Discuss the types of hair loss and their causes.
Describe the options for hair loss treatment.
Recognize hair and scalp disorders commonly seen in the salon and school and know which can be treated by cosmetologists.
Name and describe the structures of the hair root.
List and describe the three layers of the hair shaft.
Describe the three types of side bonds in the cortex.
List the factors that should be considered in a hair analysis.
Perform a Hair Analysis on a student
Progressive shrinking or miniaturization of terminal hair
Affects millions of men and women in the United States
Vellus (lanugo) hair: short, fine, downy, unpigmented hair on body. Women have more than men.
Helps with the evaporation of perspriration.
Terminal hair: long, thick, pigmented hair found on scalp, legs, arms, and body. Courser then Vellus
Two Types of Hair
terminal hair turning into Vellus
genetics, age or hormonal imbalance
Temporary - Pregnancy
brittle and swelling
Thickness and Diameter of each hair strand
The average head contains
Low porosity Higher
High porosity Lower
require a more alkaline solution and raise the cutical
require a less alkaline solution (cuticle is already raised)
Proper nutrients required.
Hair made up of 20 amino acids. Body produces 11 of the 20.
Proteins are sources of amino acids and their side bonds.
Name and describe the five main structures of the hair root.
one million hairs per square inch...WOW
Name and describe the two types of hair and their locations on the body.
What are the three phases of the hair growth cycle and what occurs during each?
what are the three phases of the growth cycle