NIC Esthetician Written ExamScientific ConceptsMedium
An esthetician is performing a facial on a client with hyperpigmentation. To effectively reduce the appearance of dark spots and promote an even skin tone, which layer of the epidermis should be the primary target for exfoliation and brightening treatments?
- AStratum lucidum
- BStratum corneum
- CStratum granulosum
- DStratum spinosum
Show answer & explanationAnswer & explanation
Correct answer: B. Stratum corneum
The stratum corneum is the outermost layer of the epidermis, composed of dead skin cells. Exfoliation targets this layer to remove pigmented cells and allow newer, less pigmented cells to surface, thus reducing hyperpigmentation.
Why the other options are wrong
- A. The stratum lucidum is present only in thick skin (palms and soles) and is not the primary target for general facial exfoliation.
- C. The stratum granulosum is deeper than the corneum and primarily involved in keratinization, not the main target for surface pigmentation issues.
- D. The stratum spinosum is a living layer where keratinocytes are bound by desmosomes; targeting it directly with exfoliation would be too aggressive and harmful.
Stratum Corneum
The outermost layer of the epidermis, consisting of dead, flattened keratinocytes.
- Protective barrier
- Continuously sheds
- Target for exfoliation
Memory trick: Corny Guys Like Grandma's Spinach.