DOCSLIB.ORG

Table of Contents

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Table of Contents TABLE OF CONTENTS 2013-2014 North Carolina Cosmetology Update Chapter 1: Principles of Haircutting (4 CE Hours) 1 Chapter 2: Perms - Current Styles and Methods (2 CE Hours) 13 Chapter 3: Wigs and Hairpieces (2 CE Hours) 21 Chapter 4: Indoor Air Quality Guide (2 CE Hours) 28 Chapter 5: Hair Color Principles (4 CE Hours) 40 Chapter 6: Chemical Make-Up of Hair, Skin & Nails (2 CE Hours) 47 Chapter 7: Sanitation and Sterilization (2 CE Hours) 54 Chapter 8: Retail Concepts (2 CE Hours) 60 Chapter 9: Tax Responsibilities for the Personal Service Worker (2 CE Hours) 70 Chapter 10: Domestic Violence and the Salon Professional (2 CE Hours) 81 Self-Assessment Answer Sheet for all sections 89 Course Evaluation 90 Complete this course online 9 Immediate scoring. 9 Instant certificate of completion. www.nccosmo.cme.edu © 2013. All rights reserved. These materials may not be reproduced without permission. This publication is designed to provide general information prepared by professionals in regard to the subject matter covered. It is provided with the understanding that INFORMED is not engaged in rendering legal, medical, or other professional services. Although prepared by professionals, this publication should not be utilized as a substitute for professional services in specific situations. If legal advice, medical advice or other expert assistance is required, the service of a professional should be sought. Page ii INFORMED Chapter 1 Principles of Haircutting (4 CE Hours) Learning objectives down would be considered the side. Everything from the ear ` Identify areas of the head. back and from the parietal bone down would be considered the ` Identify various lines and angles. back. The highest point of the head is called the apex and the ` Identify elevations related to cutting hair. triangular section from the apex to the outer corners of the eyes ` Identify the different face shapes. is the fringe (bang) area. From the apex to the parietal ridge is ` Describe hair analysis. the crown. ` Describe the use of cutting shears. ` Identify the proper method to hold cutting tools. LINES AND ANGLES ` Describe appropriate posture and body position when There are 3 basic lines one follows when doing a haircut; performing a haircut. horizontal, vertical and diagonal. Horizontal lines are used when ` Identify different types of haircuts. creating weight lines in the hair and when cutting 0 degree ` Acquire knowledge in hair cutting tips. haircuts with a stationary guideline (one that does not move). Vertical lines are used to create movement and lightness in the Areas of the head hair and are used in 45 degree cuts, 90 degree cuts and 180 degree cuts using a traveling guideline (one that moves around As you know, there are many planes and angles in the human the head, using previously cut hair). Diagonal lines are used to skull. As hairdressers, we must be aware of these angles and connect two horizontal lines. use them to our advantage, or they will work against us. A look at the human skull reveals some important planes that affect us Angles occur where two lines intersect, such as where a diagonal when cutting hair. line and a horizontal line connect. A diagonal forward bob has very strong angles at the front hairline. For instance, when looking at the frontal bone (Figure 1) from the side view, if you are doing a 90 degree haircut, the angle of Knowledge of the different types of haircuts and your fingers and scissors should be slanted at an angle directly out from the head to follow the shape of the bone structure. elevations When cutting the hair on the top of the head, the hair should be held straight up and the hand and scissors should be horizontal. When looking at the side of the head, if doing a short haircut, it is easy to see where the shape of the head changes. The sides would be cut very short in a vertical line and then the haircut would change at the parietal ridge, where the head starts to round. If doing a short graduated cut, at the top of the occipital bone, the head shape changes and that is where the graduation would end. When moving around the head shape, it is naturally divided into areas we are all familiar with. For instance, everything from the parietal bone and up would be considered the top of the head. Everything from the ear forward and from the parietal bone Figure 1. Front and side view of facial bones. INFORMED Page 1 The basic haircuts or elevations include the solid or 0 degree Square cut, the graduated or 45 degree cut, the uniform or 90 degree cut A square shaped face is broad in the forehead and chin area and the long layered or 180 degree cut. As anyone who cuts hair without an increase in width at the cheekbones. The best knows, you cut many other angles besides these based on the hairstyles for square faces create a hairstyle that softens the hair effect you are trying to achieve, but the basic four elevations are around the temple and jaw. Add volume around the ear area. a good starting point. If you need to create weight in a haircut, you will want to use a Oval very low or 0 degree elevation. This is commonly at the bottom This facial shape is considered the ideal. The face is evenly of the haircut, such as in a solid shape. However, throughout the divided in measurements from the forehead to the eyebrows, the years, 0 degree cuts have cropped up at other places on the head, eyebrows to the tip of the nose and the tip of the nose to the chin. such as the infamous bowl cut in the eighties. It is 1 ½ times longer than it is wide. This facial shape can wear any hairstyle successfully. If you want to build a graduated shape at the bottom of a haircut, the 45 degree elevation is the way to go. The most famous ProfILES example of a 45 degree cut in recent history is Victoria Beckham who spawned a whole movement reminiscent of the Dorothy There are three different profiles you with which you should be Hamill cut in the 1970s. familiar. These types are straight, convex and concave. A 90 degree cut gives lots of movement to the hair as all strands A straight profile is the desired profile. The forehead, nose and are cut to a similar length with a traveling guideline. A 180 chin are presented in a relatively straight line. No feature is more degree haircut or long layered cut is a beautiful, classic look that prominent than another. Any hairstyle will work with this profile. never goes out of style. The convex profile features a receding forehead and chin and a prominent nose. A hairstyle with full bangs to cover the forehead FacIAL SHAPES and fill it out will be helpful. Volume at the occipital bone should There are many different facial shapes and while the oval shape be avoided as it will accentuate the nose. is considered the ideal facial shape, it is obvious that women The concave profile features a prominent forehead and chin with considered beautiful by society have every face shape possible. a small nose. Bangs without volume will help to disguise the prominence of the forehead. Round A round facial shape is wide through the cheekbone area with a KNOWLEDGE OF HAIR ANALYSIS fairly short forehead and chin. The best hairstyle for round faces There are a number of areas you need to analyze before cutting is a hairstyle that has volume or height on top and closeness or a person’s hair, namely texture, density, elasticity, porosity, and no volume at the sides will enhance a round face. An elongated growth patterns. shape helps to lengthen the face. First you need to look at the texture of the hair. The texture Diamond describes the diameter of each individual hair strand, whether it A diamond shaped face has a narrow forehead and chin and is fine, medium or coarse. This will greatly affect how the hair has width through the cheekbone area. The best hairstyles for lays after the haircut. Many times when clients choose haircut diamond-shaped faces are hairstyles with fullness at the jaw line photos they choose a look on a model who has a different texture and forehead while keeping the hair close to the cheekbone will hair than them. It is up to you, the professional, to explain how show a diamond shaped face to its best advantage. their hair will look with the same haircut. Another aspect of hair analysis that must be examined is density. Heart Density is the number of hairs per square inch. Obviously, the A heart shaped face carries width through the forehead area less hair a person has the harder it will be to achieve the desired tapering down to a narrow chin. The best hairstyle for a heart- hairstyle. On the other hand, a person with heavy density may shaped face includes bangs to reduce the width of the forehead not achieve the desired look if they ask for a razor cut with a with fullness at the jaw line will make this facial shape look its feathered look. best. Elasticity must be taken into account when cutting hair. A person Oblong with a lot of elasticity in their hair may end up with bangs or An oblong shaped face is very long with a high forehead and overall length that is a lot shorter than what they desire if the prominent chin.
Load more

Recommended publications
  • COSMETOLOGY CURRICULUM | Styling
    COSMETOLOGY CURRICULUM | Styling Book ONE | Student Guide COSMETOLOGY CURRICULUM | Styling TABLE OF CONTENTS 1. Introduction to Styling Hair..................................................................3 2. Finger Waving Technique........................................................................11 3. Curl Bases and Stems................................................................................18 4. Pin Curls (Flat and Volume)....................................................................22 5. Roller Setting and Curl Variations........................................................34 6. Back-Combing and Back-Brushing.......................................................40 7. Half-Round Brush Air Forming Technique........................................45 8. Round Brush Styling Technique............................................................51 9. Finger Drying and Palm Drying............................................................57 10. Thermal Techniques for Curling...........................................................62 11. Thermal Techniques for Creating Waves.........................................73 12. Thermal Techniques for Smoothing and Straightening.............81 13. French Twist................................................................................................91 14. Draped Style...............................................................................................97 15. Chignon........................................................................................................101
    [Show full text]
  • Beauty Trends 2015
    Beauty Trends 2015 HAIR CARE EDITION (U.S.) The image The image cannot be cannot be displayed. displayed. Your Your computer computer may not have may not have enough enough memory to memory to Intro open the open the With every query typed into a search bar, we are given a glimpse into user considerations or intentions. By compiling top searches, we are able to render a strong representation of the United States’ population and gain insight into this specific population’s behavior. In our Google Beauty Trends report, we are excited to bring forth the power of big data into the hands of the marketers, product developers, stylists, trendsetters and tastemakers. The goal of this report is to share useful data for planning purposes accompanied by curated styles of what we believe can make for impactful trends. We are proud to share this iteration and look forward to hearing back from you. Flynn Matthews | Principal Industry Analyst, Beauty Olivier Zimmer | Trends Data Scientist Yarden Horwitz | Trends Brand Strategist Photo Credit: Blind Barber (Men’s Hair), Meladee Shea Gammelseter (Women’s Hair), Andrea Grabher/Christian Anwander (Colored Hair), Catface Hair (Box & Twist Braids), Maria Valentino/MCV photo (Goddess Braid) Proprietary + Confidential Methodology QUERY To compile a list of accurate trends within the Jan-13 Aug-13 Jan-14 Aug-14 Jan-15 Aug-15 beauty industry, we pulled top volume queries related to the beauty category and looked at their monthly volume from January 2013 to August 2015. We first removed any seasonal effect, and DE-SEASONALIZED QUERY then measured the year-over-year growth, velocity, and acceleration for each search query.
    [Show full text]
  • Hairstyle Email Course TIP #1
    Hairstyle Email Course TIP #1 Subject: Why you need to understand your hair type before changing your hairstyle ====================================================================== EMAIL Hi Tanner, Thank you for requesting the "7 Steps To Discovering Your Perfect Hairstyle" email course. These 7 short lessons will help you find the hairstyle that's perfect for you. A style that fits your unique face shape, personality and lifestyle. You will receive one email a day for 7 days. Each email will contain a link to the "lesson" (takes about 5 minutes to read). If you go through this course you'll walk away with a better understanding of how to select a style that brings out the best in you. So without further ado let's dive into Lesson #1: Understanding Your Hair Type. Click here to learn more. ============================================= LANDING PAGE The 4 Main Men's Hair Types One of the most important factors when it comes to choosing the hairstyle that's right for you has to do with your hair type. The density and texture of your hair will influence the "parameters" you have to work within when it comes to your new style. Below are the four main hair types along with tips for each. 1. Thick Hair Tips [Insert thick hair photo to the right] * If you have really thick hair, ask the stylist to thin it for you so it won't lay so thick at the bottom. * Choose a hairstyle that has a "layered cut" (true for both short & long hair). Otherwise it will lay as one big pile. * Comb or brush your hair to reduce the "poofiness".
    [Show full text]
  • Makeup-Hairstyling-2019-V1-Ballot.Pdf
    2019 Primetime Emmy® Awards Ballot Outstanding Hairstyling For A Single-Camera Series A.P. Bio Melvin April 11, 2019 Synopsis Jack's war with his neighbor reaches a turning point when it threatens to ruin a date with Lynette. And when the school photographer ups his rate, Durbin takes school pictures into his own hands. Technical Description Lynette’s hair was flat-ironed straight and styled. Glenn’s hair was blow-dried and styled with pomade. Lyric’s wigs are flat-ironed straight or curled with a marcel iron; a Marie Antoinette wig was created using a ¾” marcel iron and white-color spray. Jean and Paula’s (Paula = set in pin curls) curls were created with a ¾” marcel iron and Redken Hot Sets. Aparna’s hair is blow-dried straight and ends flipped up with a metal round brush. Nancy Martinez, Department Head Hairstylist Kristine Tack, Key Hairstylist American Gods Donar The Great April 14, 2019 Synopsis Shadow and Mr. Wednesday seek out Dvalin to repair the Gungnir spear. But before the dwarf is able to etch the runes of war, he requires a powerful artifact in exchange. On the journey, Wednesday tells Shadow the story of Donar the Great, set in a 1930’s Burlesque Cabaret flashback. Technical Description Mr. Weds slicked for Cabaret and two 1930-40’s inspired styles. Mr. Nancy was finger-waved. Donar wore long and medium lace wigs and a short haircut for time cuts. Columbia wore a lace wig ironed and pin curled for movement. TechBoy wore short lace wig. Showgirls wore wigs and wig caps backstage audience men in feminine styles women in masculine styles.
    [Show full text]
  • Contemporary Carioca: Technologies of Mixing in A
    Con tempo C o n t e m p o r a r y raryC a r i o c a Cari oca ontemporary CCarioca Technologies of Mixing in a Brazilian Music Scene Frederick Moehn Duke University Press Durham anD LonDon 2012 © 2012 Duke University Press All rights reserved. Printed in the United States of America on acid-free paper ♾ Designed by Kristina Kachele Typeset in Quadraat and Ostrich Sans by Tseng Information Systems, Inc. Library of Congress Cataloging- in- Publication Data appear on the last printed page of this book. Duke University Press gratefully acknowledges the support of Stony Brook University, which provided funds toward the publication of this book. For Brazil’s musical alchemists ontents Illustrations ix C Preface xi Acknowledgments xxiii Introduction 1 1 Marcos Suzano: A Carioca Blade Runner 25 2 Lenine: Pernambuco Speaking to the World 55 3 Pedro Luís and The Wall: Tupy Astronauts 92 4 Fernanda Abreu: Garota Carioca 130 5 Paulinho Moska: Difference and Repetition 167 6 On Cannibals and Chameleons 204 Appendix 1: About the Interviews, with a List of Interviews Cited 211 Appendix 2: Introductory Aspects of Marcos Suzano’s Pandeiro Method 215 Notes 219 References 245 Discography 267 Index 269 llustrations Map of Rio de Janeiro with inset of the South Zone 6 1 “mpb: Engajamento ou alienação?” debate invitation xii 2 Marcos Suzano’s favorite pandeiro (underside) 29 I 3 Marcos Suzano demonstrating his pandeiro and electronic foot pedal effects setup 34 4 A common basic samba pattern on pandeiro 48 5 One of Marcos Suzano’s pandeiro patterns 49 6 Marcos
    [Show full text]
  • Cosmetology Curriculum
    Cosmetology Curriculum Book Cosmetology Curriculum Student's Guide 131733_S_0000FrontMatter.indd Sec0i 12/8/04 10:10:36 AM The Aveda Institute Mission The Aveda Institute’s mission is to provide a quality professional education by: • Creating an environment of trust and respect • Encouraging a commitment to teamwork • Promoting personal and professional development • Inspiring the continuous quest for knowledge and growth By supporting our students in this manner, we enable them to provide service that exceeds our clients’ expectations. Printed with soy-based ink on paper made of 30% post-consumer fiber. © 2002 Aveda Corporation. All rights reserved. 4000 Pheasant Ridge Drive, Minneapolis, MN 55449 www.aveda.com 131733_S_0000FrontMatter.indd Sec0ii 12/8/04 10:10:37 AM CONTENTS Contents Module 1: Introduction 1. The Aveda Institute Cosmetology Curriculum 2. Welcome to Aveda 3. Using the Time Management Wheel 4. Sensory Experience 5. Self Care 6. Client Care Module 2: Science 1. Cells and Body Tissues 2. The Body’s Systems 3. pH Scale 4. Chemistry 5. Product Classifications 6. Bacteriology 7. Light Therapy 8. Electricity Module 3: Hair Care and Client Preparation 1. What Is Hair? 2. Scalp and Hair Disorders 3. Preparing Your Station 4. Performing a Hair Service Consultation 5. Preparing the Client 6. Shampooing and Deep Conditioning © 2002 Aveda Corporation i 131733_S_0000FrontMatter.indd Sec0iii 12/8/04 10:10:37 AM CONTENTS Module 4: Cutting Hair 1. Introduction to Cutting Hair 2. Handling the Scissors and Comb 3. Sectioning 4. One-Length Technique 5. Graduated Cutting Technique 6. Layered Cutting Technique 7. Texturizing Tools and Techniques 8.
    [Show full text]
  • List of Hairstyles
    List of hairstyles This is a non-exhaustive list of hairstyles, excluding facial hairstyles. Name Image Description A style of natural African hair that has been grown out without any straightening or ironing, and combed regularly with specialafro picks. In recent Afro history, the hairstyle was popular through the late 1960s and 1970s in the United States of America. Though today many people prefer to wear weave. A haircut where the hair is longer on one side. In the 1980s and 1990s, Asymmetric asymmetric was a popular staple of Black hip hop fashion, among women and cut men. Backcombing or teasing with hairspray to style hair on top of the head so that Beehive the size and shape is suggestive of a beehive, hence the name. Bangs (or fringe) straight across the high forehead, or cut at a slight U- Bangs shape.[1] Any hairstyle with large volume, though this is generally a description given to hair with a straight texture that is blown out or "teased" into a large size. The Big hair increased volume is often maintained with the use of hairspray or other styling products that offer hold. A long hairstyle for women that is used with rich products and blown dry from Blowout the roots to the ends. Popularized by individuals such asCatherine, Duchess of Cambridge. A classic short hairstyle where it is cut above the shoulders in a blunt cut with Bob cut typically no layers. This style is most common among women. Bouffant A style characterized by smooth hair that is heightened and given extra fullness over teasing in the fringe area.
    [Show full text]
  • Excellent Service Got a Haircut Just Like I Wanted Love My Color
    Excellent Service by Anon on 2012-10-31 Very grateful to Empire Salon and their staff. I have always had timely and quality service. They can accommodate most schedules and the atmosphere is upbeat and fun. There isn't anything they cannot do and are well-versed in everything 'hair'. Brazilian, extentions, color (classic brunette to purple), cuts, suggestions and styling... all in their expertise etc. Will was great and I have had great success with Jeanette too. Just moved to Irvine recently and I will continue to make Empire my 'hair home'. NPS: N/A Got a haircut just like I wanted by Arjun Khode on 2016-10-09 Got a haircut just like I wanted NPS: Love my color and cut! by Marilyn Cavener on 2016-10-05 Love my color and cut! NPS: Great service, great surroundings ... great result!! by Christa Kropp on 2016-09-14 Great service, great surroundings ... great result!! NPS: Janette (or "Dang" as they call her) is amazing and extremely attentive. She is very personable and professional. I am a first time balayager and Janette exceeded my expectations. I'm in love with my new do. She also gave me an amazing cut. I am a low maintenance gal and very undecided when it comes to my hair; and Janette gave me great suggestions. I highly recommend her to EVERYONE. by Anon on 2016-09-11 Janette (or "Dang" as they call her) is amazing and extremely attentive. She is very personable and professional. I am a first time balayager and Janette exceeded my expectations.
    [Show full text]
  • Garren Right
    behindthecover with When Victoria Beckham or Madonna is in your chair, there’s way more at stake than a haircut or a few highlights. The whole world is watching and you could have a multi-million dollar impact on your client’s career. Positive if you get it garren right. Disastrous if you don’t. hat’s why the owner of the eponymous that didn’t matter. His only objective was to New York salon and top session artist create something suitable and chic, as he Thas very firm ideas and procedures in would for any client. So he collected dozens place when it comes to change. As a result, of photos and analyzed which elements of her Garren’s makeovers are about more than hairstyles worked and which didn’t over the new hairstyles. Sometimes they are respon- years. “I realized I liked seeing her face and sible for the complete transformation of a her neck,” he reveals, “and when her hair got high profile career. too long, I thought she looked ordinary.” As the next step, he collected photos of his high- The First Supermodel profile short haircuts—on Evangelista and Everyone in the fashion world knows that models Stella Tennant and Lucie de la Falaise models have very little say over how they among others. He presented the portfolio to wear their hair. Most agents and clients Beckham and said, “I won’t do anything just demand long, non-descript styles that can be to make a statement—it has to be something coifed to suit the particular job.
    [Show full text]
  • Being in Afro-Brazilian Families by Elizabeth Hordge
    Home is Where the Hurt Is: Racial Socialization, Stigma, and Well- Being in Afro-Brazilian Families By Elizabeth Hordge Freeman Department of Sociology Duke University Date: _____________________ Approved: ________________________________________ Eduardo Bonilla-Silva, Co-Supervisor _________________________________________ Linda George, Co-Supervisor _________________________________________ Lynn Smith-Lovin _________________________________________ Linda Burton __________________________________________ Sherman James Dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Sociology in the Graduate School of Duke University 2012 ! ABSTRACT Home is Where the Hurt Is: Racial Socialization, Stigma, and Well- Being in Afro-Brazilian Families By Elizabeth Hordge Freeman Department of Sociology Duke University Date: _____________________ Approved: ________________________________________ Eduardo Bonilla-Silva, Co-Supervisor _________________________________________ Linda George, Co-Supervisor _________________________________________ Lynn Smith-Lovin _________________________________________ Linda Burton __________________________________________ Sherman James An abstract submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Sociology in the Graduate School of Duke University 2012 ! ! Copyright by Elizabeth Hordge Freeman 2012 ! Abstract This dissertation examines racial socialization in Afro-Brazilian families in
    [Show full text]
  • ©/™2019 American Girl
    ® IT’S HER TIME TO SHINE! Please note that we only accept appointments for authentic American Girl dolls. 800-845-0005 americangirl.com ©/™ 2019 American Girl DOLL HAIR SALON STYLES FOR SMOOTH HAIR Sweetheart 2 braids $20 Zigzag ponytail $20 2 half-braids $20 Fishtail braid $20 $20 braid -- Not for children under 3 years. See below for full warning. Half-ponytail Half- Ponytail veil $20 Double- $20 $20 $15 $15 decker ponytail twist with braid ponytail braid Waterfall -- Not for children under 3 years. See below for full warning. Crisscross Ponytail flip $15 Half-side fishtail $15 2 pigtails $15 side ponytail $10 Ponytail $10 -- Not for children under 3 years. See below for full warning. Half-ponytail $10 All down $10 -- -- Not for children under 3 years. See below for full warning. 800-845-0005 americangirl.com ©/™ 2020 American Girl, LLC 8+ DOLL HAIR SALON STYLES FOR LAYERED HAIR Sweetheart Half-ponytail 2 half-braids $20 Zigzag ponytail $20 $20 Ponytail veil $20 $20 braid twist with braid -- Not for children under 3 years. See below for full warning. Crisscross $ Half-side fishtail $ 2 pigtails $15 $ $10 Waterfall 15 15 side ponytail 10 Ponytail -- Not for children under 3 years. See below for full warning. Half-ponytail $10 All down $10 -- Not for children under 3 years. See below for full warning. -- 800-845-0005 americangirl.com ©/™ 2020 American Girl, LLC 8+ DOLL HAIR SALON STYLES FOR TEXTURED HAIR Sweetheart 2 braids $20 Zigzag ponytail $20 2 half-braids $20 Fishtail braid $20 $20 braid -- Not for children under 3 years.
    [Show full text]
  • The Disruption of Sox21-Mediated Hair Shaft Cuticle Differentiation Causes Cyclic Alopecia in Mice
    The disruption of Sox21-mediated hair shaft cuticle differentiation causes cyclic alopecia in mice Makoto Kisoa,1, Shigekazu Tanakab,1, Rie Sabaa, Satoru Matsudac, Atsushi Shimizud, Manabu Ohyamad, Hirotaka James Okanoc, Toshihiko Shiroishib,e, Hideyuki Okanoc, and Yumiko Sagaa,e,2 Divisions of aMammalian Development and bMammalian Genetics, National Institute of Genetics, Yata 1111, Mishima, Shizuoka 411-8540, Japan; Departments of cPhysiology and dDermatology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; and eDepartment of Genetics, SOKENDAI, The Graduate University for Advanced Studies, 1111 Yata, Mishima, Shizuoka 411-8540, Japan Edited by Elaine Fuchs, The Rockefeller University, New York, NY, and approved April 21, 2009 (received for review August 27, 2008) Hair is maintained through a cyclic process that includes periodic Results regeneration of hair follicles in a stem cell-dependent manner. The Lack of Sox21 Results in Cyclic Alopecia. As a first step to Little is known, however, about the cellular and molecular mech- elucidate in vivo function of Sox21, we have generated a Sox21 anisms that regulate the layered differentiation of the hair follicle. KO mouse (Fig. S1). The homozygous mice were born normally We have established a mutant mouse with a cyclic alopecia phe- but showed an unexpected and striking phenotype, cyclic alo- notype resulting from the targeted disruption of Sox21, a gene pecia. The mice started to lose their fur from postnatal day 11 that encodes a HMG-box protein. These mice exhibit progressive (P11), beginning at the head and progressing toward the tail hair loss after morphogenesis of the first hair follicle and become region of the back (Fig.
    [Show full text]