sternocleidomastoid origin and insertion

sternocleidomastoid origin and insertion
November 1, 2020

's' : ''}}. About Us. Is a Master's Degree in Chemical Engineering Worth It? Get access risk-free for 30 days, Accessory XI nerve. Best Schools in San Jose, CA, for a Dental Assisting Degree, Top School in Pittsburgh for Becoming an Accountant, How to Become an OBGYN Nurse: Education and Career Roadmap, Aquatic Biology Degree and Training Program Overviews, Distance Learning Electronics Master's Degree, Bachelors Degree in Emergency Medicine Program Overview, Bachelor of Science in Software Development Program Info, Associate of Home Technology Integration Degree Overview, Sternocleidomastoid Muscle: Origin, Insertion & Action, Muscle Dysfunction in the Head, Neck & Shoulders, Physics 101 Syllabus Resource & Lesson Plans, High School Physics Curriculum Resource & Lesson Plans, MTTC Biology (017): Practice & Study Guide, GACE Chemistry (528): Practice & Study Guide, ILTS Health Education (211): Test Practice and Study Guide, Prentice Hall Physical Science: Online Textbook Help, Palynology: Definition, Branches & Applications, What is Forensic Palynology? Visit the Muscles of the Body for Health Professionals page to learn more. The insertion of a muscle is the attachment site that moves when the muscle contracts.

The sternocleidomastoid (SCM) muscle is a voluntary, skeletal muscle located on each side of the neck. Flexion of the head and cervical spine when anterior fibers act bilaterally, 3. Attachments of the Sternocleidomastoid The sternocleidomastoid muscle (SCM) is an important landmark in the neck which divides it into an anterior and a posterior triangle. The sternocleidomastoid originates from the manubrium of the sternum and the clavicle. | PBL Ideas & Lesson Plans, Business Law for Teachers: Professional Development, High School US History: Homework Help Resource, Business Calculus Syllabus & Lesson Plans, Communicate in Multiple Contexts: CCSS.ELA-Literacy.SL.11-12.6, Quiz & Worksheet - Results of Glacial Deposition, Quiz & Worksheet - Positive Organizational Scholarship in the Workplace, Quiz & Worksheet - Chemical Classifications of Silicate Minerals, Quiz & Worksheet - Biases & Judgments in Decision Making, Quiz & Worksheet - Gerund, Participial, & Prepositional Phrases, Anti-Hero: Definition, Examples & Characteristics, Role of Bacteria in Gastrointestinal Health, Alternative Teacher Certification in New York, Tech and Engineering - Questions & Answers, Health and Medicine - Questions & Answers. It is a skeletal muscle because it is attached to the skeleton. Insertion: The sternocleidomastoid muscle is one of the largest and most superficial cervical muscles. {{courseNav.course.topics.length}} chapters | 'Sterno-' refers to the sternum, '-cleido-' the clavicle, and '-mastoid' the mastoid process behind the ear. You have just given your sternocleidomastoid muscle a good work out. The SCM is a two-headed muscle, which means the muscle originates at two separate points and then converges to insert at one point. Contraction, or shortening, of the SCM on both sides of the body causes neck flexion. Origin and insertion The sternal head originates from the manubrium sterni, while the clavicular head from the medial third of the clavicle. The actions of the SCM are to flex and rotate the head. Mastoid process (behind the ear).

Protracts head when acting together . Turn your head to the right. The Trail Guide To The Body is another excellent book to help you learn the musculature of the human body. Copyright © 2016 - 2019 How To Relief. Now look over your shoulder. To learn more, visit our Earning Credit Page. Extends neck when neck already partially extended: NERVE Spinal accessory nerve (lateral roots C1-5) How To Protect Your Eyes From Electronics Devices? - Definition & Cases, What is Paleobotany? Some deep cervical lymph nodes and soft tissues of the neck are also protected.

Sternocleidomastoid (SCM) (synonym musculus sternocleidomastoideus) is a paired superficial muscle in the anterior portion of the neck. All other trademarks and copyrights are the property of their respective owners. The top of the sternum supports the left and right clavicles. Another action of the SCM is to assist in respiration (breathing) by elevating your ribs. The clavicle, or collarbone, is a long bone that connects the sternum to the shoulder blade. Is a PhD in Electrical Engineering Worth It? credit by exam that is accepted by over 1,500 colleges and universities. Your email address will not be published. ORIGIN Anterior and superior manubrium and superior medial third of clavicle: INSERTION Lateral aspect of mastoid process and anterior half of superior nuchal line: ACTION Flexes and laterally rotates cervical spine. first two years of college and save thousands off your degree. The name 'sternocleidomastoid' actually tells you a lot about this muscle and its attachments. It is also called a voluntary muscle because it only moves under conscious control, meaning you must think about it for it to happen.

The SCM's insertion is the mastoid process located behind the ear. Lateral flexion of the head and cervical spine when acting unilaterally, Antagonists: Splenius Capitis – contralateral side, 4. Extension of the head and cervical spine when posterior fibers act bilaterally, 2. 'Sterno-' refers to the sternum, '-cleido-' the clavicle, and '-mastoid' the mastoid process behind the ear. Look at the floor again. You have just contracted your right SCM while relaxing the left SCM. What is the role of the sternocleidomastoid muscle in rotating the head to the left and right? The anterior surface of the upper sternum

The SCM's origins are the sternum and clavicle and its insertion is the mastoid process behind the ear. Actions: Bilaterally: Flexion of the head and neck, extension of the head and neck Unilaterally: Rotation of head to opposite side, lateral flexion The inner part of the clavicle.

To unlock this lesson you must be a Study.com Member. You can remember the SCM's origins are the to attachments sites that begin with the first two letters. The sternocleidomastoid muscle has a role in the body as big as its name. Origin: Not sure what college you want to attend yet? When you take a deep breath in, your SCM helps to bring up your thoracic cage (rib cage) and clavicles, creating a larger space for the lungs to expand. Create an account to start this course today. The mastoid process is a part of the temporal bone that serves as a point of attachment for other muscles as well. She has certifications in CPN, ACLS, PALS, and NRP. Contraction on one side only: Laterally flexes to the same side(side bends) and rotates to the other side. Now put your ear to your shoulder. Here we will discuss its location in the body (origin and insertion) as well as its action (the movement it makes). The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. Required fields are marked *. Contralateral rotation of the head and cervical spine when acting unilaterally. credit-by-exam regardless of age or education level. Contraction on both sides: Neck flexion. imaginable degree, area of Services. flashcard set{{course.flashcardSetCoun > 1 ? This muscle binds the skull to the sternum and clavicle.It protects the vertical neurovascular bundle of neck, branches of cervical plexus, deep cervical lymph nodes and soft tissues of neck from damage I highly recommend this book for anyone studying anatomy. The SCM is a two-headed muscle, which means the muscle originates at two separate points and then converges to insert at one point. The insertion is the lateral surface of the mastoid process of the temporal bone and the lateral half of the superior nuchal line of the occipital bone.

The name 'sternocleidomastoid' actually tells you a lot about this muscle and its attachments. Lisa is a Registered Nurse with a 14 years of experience and a Masters Degree in Nursing Education. Origin. Log in here for access. and career path that can help you find the school that's right for you. just create an account. Get the unbiased info you need to find the right school. © copyright 2003-2020 Study.com. Sternocleidomastoid: Nerve Supply & Trigger Points, Quiz & Worksheet - Sternocleidomastoid Muscle Anatomy, Over 83,000 lessons in all major subjects, {{courseNav.course.mDynamicIntFields.lessonCount}}, What is the Platysma Muscle? Function of the Sternocleidomastoid

The sternocleidomastoid is innervated by the accessory nerve. {{courseNav.course.mDynamicIntFields.lessonCount}} lessons Study.com has thousands of articles about every It does this by contracting both SCMs together or one alone, respectively. The sternocleidomastoid muscle is named for its points of what and what? S for 'sternum' and C for 'clavicle'. Splenius; Main Menu | Muscle Lists | Exercises. Is a Master's Degree in Civil Engineering Worth It? Sciences, Culinary Arts and Personal courses that prepare you to earn - Definition & Function, Digastric Muscle: Action, Origin & Insertion, Digastric Muscle: Definition, Function & Innervation, Omohyoid Muscle: Function, Origin & Innervation, Longus Colli Muscle: Action, Origin & Insertion, Scalene Muscles: Function, Innervation & Action, Levator Scapulae: Origin, Insertion & Action, Levator Scapulae: Definition, Function & Innervation, Obliquus Capitis Muscles: Inferior & Superior, Semispinalis Capitis: Action, Origin & Insertion, Semispinalis Capitis: Definition, Function & Innervation, Splenius Capitis Muscle: Definition, Origin & Action, Muscles of the Body for Health Professionals, Biological and Biomedical Did you know… We have over 220 college Sternocleidomastoid: Origin, Insertion, Nerve Supply & Action The sternocleidomastoid muscle is also known as sternomastoid and commonly abbreviated as SCM, is a paired muscle in the superficial layers of the side of the neck. Earn Transferable Credit & Get your Degree. Though the book is geared toward massage therapists and physical therapist assistants, the book with its illustrations and text helps anyone gain a thorough understanding of the human musculoskeletal system and movement.

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