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Chapter 11 Properties of Hair and Scalp
Transcript of Chapter 11 Properties of Hair and Scalp
COHNS Structure of the Hair Carbon
Sulfur Pigment in the cortex Vellus Hair
Terminal Hair Excessive production and accumulation of skin cells
Results from the fungus Malassezia Hair root- beneath the epidermis
Hair shaft- projects above the epidermis
Follicle- pocket that contains the hair root
Hair bulb- club shaped structure that forms
the lower part of the hair root
Dermal papilla- contains blood and nerve
supply providing nutrients for hair
Arrector pili muscle- involuntary muscle that
causes goose bumps
Sebaceous glands- oil glands connected to the
hair follicles same elements are also in skin and nails Eumelanin- dark brown and black pigment Pheomelanin- Red and yellow tones Growth Phase Anagen- growth phase
Catagen- transition between growth and resting phases
Telogen- resting phase Alopecia Androgenic- terminal hair miniatrurized and converted back to vellus hair
Areata- immune system attacking the hair follicle during the anagen phase
Postpartum-3-9 months after delivery Treatments Minoxidil- topical medication stimulates growth (Nioxin, Rogaine)
Finasteride- oral prescription medication for men only (negative side effects) Canities Gray hair (absence of pigment) Ringed Hair bands of gray and pigmented hair on the same hair strand Hypertrichosis Terminal hair in areas that shouldn't have hair Trychoptilosis Split ends Trichorrhexis Nodosa Knotted brittle hair that breaks easily Monilethrix Beaded hair that breaks easily Fragilitas Crinium Brittle hair that splits at any part of the hair Dandruff Pityriasis Capitis Simplex Pityriasis steatoides Irritated scalp
Itchy scalp More severe
Mixed with sebum
Stick to the scalp
AKA seborrheic dermatitis Tinea Ringworm, contagious, easily transmitted Tinea Capitis Red papules or spots, hair becomes brittle and breaks Tinea Favosa Sulphur yellow crust called scutula that has an odor. Can scar and leave bald patches. NEVER PERFORM SERVICE ON A CLIENT WITH A FUNGAL INFECTION Pediculosis Capitis Elements that make
up the hair Side Bonds