41 terms

Dermatology: Course Introduction

STUDY
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1. Stratum Corneum
2. Stratum Lucidum
3. Stratum Granulosum
4. Stratum Spinosum
5. Stratum basale
What are the layers of the epidermis?
Parasympathetic Nerves: Consists of cholinergic neurons that release acetylcholine to the sweat glands.
Sympathetic Nerves: Consisting of adrenergic neurons that release norepinephrine to the sweat glands, arteriolar smooth muscle, and erector pili muscle
What systems innervates the skin? What do they do?
I: Always burns, never tans. Skin is pale. Red hair and freckles is common.
II: Usually burns, sometimes tans. Fair skin.
III: May burn, usually tans. Darker skin.
IV: Moderate constitutional pigmentation. Latin america, middle eastern
V: Marked constitutional pigmentation. Black.
What are the Fitzpatrick Skin Types?
Plate: Visible hard surface
Root: Generates the bed
Lunula: Visible portion of the root (white half moon)
Hyponychium and bed: Soft tissues under the plate
Cuticle: Skin overlapping the nail.
Give the 5 general areas of nail structure.
Macule
Patch
Papule
Plaque
Wheal
Pustule
Abscess
Vesicle
Bulla
Nodule
List as many primary skin lesions as you can.
Scale
Crust
Fissure
Erosion
Ulcer
Atrophy
Scar
Lichenification
Excoriation
List as many secondary skin lesions as you can.
Comedone
Cyst
Milia
Burrow
Telangiectasia
Petechia
Purpura
List as many special skin lesions as you can.
<1cm. Small Flat Skin spots.
Define a Macula
>1cm. Larger flat skin spots.
Define a Patch.
<1cm. A small skin spot with some elevation
Define a Papula.
>1cm. Skin spot with elevation. Can be rounded.
Define a Nodule
>1cm. Skin spot with elevation that is scaly and red. Can be on scalp, knees, and elbows.
Define a Plaque.
<1cm. Small area containing puss.
Define a Pustule
Larger area with puss.
Define an abscess
Fluid filled sac <1cm in size
Define a Vesicle
Fluid filled sac >1cm in size
Define a Bullae
Raised area. Red, swollen, change in shape.
Define a wheal
Flake of skin. Silvery looking (like sandpaper)
Define a scale.
Dried serum, blood, pus,
Define a crust.
Caused by chronic rubbing. This is thickened skin.
Define a Lichenification
Superficial loss of epidermis
Define erosion.
Deep sore/open sore
Define Ulcer.
Erosions on skin caused by scratching
Define Excoriation
Split/crack/linear groove in skin
Define Fissure.
Fibrotic connective tissue
Define scar.
Shrinking or thinning of skin.
Define atrophy.
Plug of sebaceous material and keratin lodged in openings of hair follicles
Define Comedone
Newborn infants. Tiny white spots on nose. These are called "milk spots" and are formed from keratin.
Define Milia
Seen in mites and scabies. Tunnelling happens which are seen as small red lines through the skin. Linear marks.
Define Burrow
Dilated blood vessels near surface of skin
Define Telangiectasia
Small pinpoint purpura
Define petechia
Macula or patch discolouration that appear red or purple
Purpura
Lesion separated from other lesions by normal skin.
Discrete Distribution
Affects only one side of the body
Unilateral Distribution
Disseminated
Generalized Distribution
Lesions are grouped in a circle
Annular Distribution
Lesions are distributed randomly over most of the body.
Disseminated Distribution
A necrotic lesions which is a scab or dry crust that results form trauma, infection, or excoriation skin.
Eschar
Distribution of skin lesions involve distal aspects of the head and extremities.
Acral Distribution
Involves skin creases and folds
intertriginous distribution
Ring Shaped
Annular shaped
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