Preview

Zygomatic Bone Essay

Good Essays
Open Document
Open Document
2960 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Zygomatic Bone Essay
The SKULL
CRANIUM (SKULL) * skeleton of the head
2 Parts * Neurocranium * Viscerocranium

1. Neurocranium * cranial vault * bony case of the brain * has a dome like roof -calvaria or skullcap * has a floor or cranial base –Basicranium * these are irregular bones with flat portions * formed by a series of 8 bones * Frontal * Ethmoidal * Sphenoidal * Occipital * Temporal (2sets) * Parietal (2 sets)
2. Viscerocranium * facial skeleton * forms the anterior part of the cranium * consists of bones surrounding the orbits, nose and mouth * consists of 15 irregular bones * Mandible * Ethmoid * Vomer * Maxillae * Zygomatic * Palatine …show more content…
INSERTION * angle of mouth

ACTION * part of dilators of mouth * elevates labial commissure bilaterally to smile (happiness) * unilaterally to sneer (disdain)

ZYGOMATICUS MINOR

ORIGIN * anterior aspect of zygomatic bone

INSERTION * skin of upper lip

ACTION * part of dilators of mouth * retract (elevate) or evert upper lip * deepen the nasolabial sulcus (sadness)

LEVATOR ANGULI ORIS

ORIGIN * infra-orbital maxilla

INSERTION * angle of mouth

ACTION * part of dilators of mouth * widens oral fissure (grinning or grimacing)

RISORIUS

ACTION * part of dilators of mouth * depresses labial commissure bilaterally to frown (sadness)

BUCCINATOR

ORIGIN * mandible * alveolar processes of maxilla and mandible * pterygomandibular raphe

INSERTION * angle of mouth * orbicularis oris

* thin, flat rectangular * more closely related to the buccal mucosa * fibers mingle medially with orbicularis oris

BUCCINATOR PLUS ORBICULARIS ORIS
ACTION

* presses cheeks against molar teeth * works with tongue to keep food between occlusal surfaces * resists distention when blowing

DEPRESSOR ANGULI
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Powerful Essays

    Chapter B 227 Study Guide Answers
    • 2095 Words
    • 9 Pages

    Chapter B 227 Study Guide Answers

    4.) The cranial bones are made up of the frontal bone, two parietal bones, two temporal bones, the occipital bone, sphenoid bone, and ethmoid bone. The facial bones consists of two nasal bones, two maxillae, two zygomatic bones, one mandible, two lacrimal bones, two palatine bones, two inferior nasal conchae, and the vomer bone. The functions of the cranial bones are to protect the brain, stabilize the position of the brain, blood vessels and nerves, and provide space for the muscles that move the head. The function of the facial bones are to provide framework for the face,…

    • 2095 Words
    • 9 Pages
    Powerful Essays
    Read More
  • Good Essays

    Pterygopalatine Fossa Notes
    • 821 Words
    • 4 Pages

    Pterygopalatine Fossa Notes

    The third, or pterygopalatine portion, of the maxillary artery enters the pterygopalatine fossa from the infratemporal fossa via the pterygomaxillary fissure…

    • 821 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    Dental Anatomy Sheet
    • 899 Words
    • 4 Pages

    Dental Anatomy Sheet

    - palatogingival groove : It starts from the lingual fossa , it interrupts the cingulum and it continues for a distance in the root surface.…

    • 899 Words
    • 4 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Navicular Bone Research Paper
    • 173 Words
    • 1 Page

    Navicular Bone Research Paper

    Navicular can be caused by galloping on hard ground or it is a hereditary condition. For this reason horses with navicular are not suitable to be bred from. I have found horses with navicular whilst in the early stages may not yet display lameness but had one who started rearing 8 weeks before going lame. The navicular bone is a very small bone in the foot and changes to this bone make it become rough. This then means the tendon running over the navicular bone has to run over a rough surface.…

    • 173 Words
    • 1 Page
    Satisfactory Essays
    Read More
  • Good Essays

    Mandibular Bone Fracture Essay
    • 542 Words
    • 3 Pages

    Mandibular Bone Fracture Essay

    Mandible is the largest and strongest of the facial bones. Mandibular bone fracture is the tenth most common fracture in the human body and second most of the facial bones next only to nasal bones. Among the mandibular bone fractures, condylar region is the most frequent site accounting for about 25-35 %.1 Condylar fractures are usually the result of a direct blow to the chin or to the lateral side of the jaw caused by Road traffic accidents, violence, accidental falls and sporting injuries. Injury to the mandibular condyle fracture deserves special consideration apart from the rest of the mandible because of its anatomical differences and healing potential.2 The treatment of condylar fractures has generated a great deal of discussion…

    • 542 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Broken Bone Research Paper
    • 1264 Words
    • 6 Pages

    Broken Bone Research Paper

    Throughout childhood and into adolescence having skinned up knees and injuries was all part of growing up. If we fell and injured ourselves, we would get right back up and move on with our lives. In some cases children may view having a broken bone as a source of pride. However for older adults the dangers of falling have real consequences because if a bone is broken it can range anywhere from a temporary inconvenience to a complete loss of independence. The elderly also have a higher chance of breaking bones when they fall due to bone loss and osteoporosis. When a person falls one of the only ways to check the extent of their injuries is through professional assessment and radiographs.…

    • 1264 Words
    • 6 Pages
    Good Essays
    Read More
  • Good Essays

    Bone Distraction Osteogenesis Essay
    • 687 Words
    • 3 Pages

    Bone Distraction Osteogenesis Essay

    Distraction osteogenesis (DO) is a method that Dr. Steve A. Sedaros uses to treat selected defects and malformations of the facial and mandibular bones. Distraction osteogenesis (aka bone distraction) can be used to widen the jaw by gradually moving the bones.…

    • 687 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Where Are The Four Muscles Of Mastication?
    • 647 Words
    • 3 Pages

    Where Are The Four Muscles Of Mastication?

    It is divided into superficial masseter muscle and deep masseter muscle. The superficial part arises from the maxillary process of the zygomatic bone, although the deep part comes from the zygomatic arch of the temporal bone. Both muscles insert into the lateral surface of the ramus of the mandible. They act by elevating the mandible upwards making it possible to close the mouth. Moreover, they are supplied by the mesenteric…

    • 647 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Essay On Osteopetrosis
    • 536 Words
    • 3 Pages

    Essay On Osteopetrosis

    Osteopetrosis is the marble bone disease which is also termed as ‘Schonberg Disease’. This is the kind of bone disorder where the bones become denser and harder due to genetic factors or even external factors. When compared to other kinds of bone disorders where certain bones become harder while others remain soft, in Osteopetrosis the bones of the entire body becomes denser. The major cause behind this abnormality is an imbalance in the formation or breakdown of bones, directly causing the bones to become dense overly. Even though bones are denser, they are prone to breakage. Most individuals are just born with this congenital condition. If the bone density is too much, it interferes with body tissues and structures. For instance, if there is compression in the skull, this can cause vision…

    • 536 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Bone Remodeling
    • 311 Words
    • 2 Pages

    Bone Remodeling

    Bone tissue continuously renews itself throughout life as a result of a variety of stimuli by the process of bone remodeling, in which old bone is replaced by new bone in order to preserve bone strength and mineral stability. It requires a particular balance between bone deposition and resorption, by the combined action of osteoblasts and osteoclasts, respectively. This process prevents the accumulation of bone micro-damage, removing injured bone and reshaping bones in response to use and disuse (Clarke, 2008; Little et al., 2011; Saladin et al., 2018). Occasionally, an unbalance among the activity of bone cells leads to a series of skeletal disorders, such as osteoporosis. Osteoporosis is a common metabolic disorder of the skeleton that occurs…

    • 311 Words
    • 2 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Case Study
    • 396 Words
    • 2 Pages

    Case Study

    The Frontal bone is beneath the forehead and the Temporal bone which connects to the lower jawbone is the one beneath the chin.…

    • 396 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    Development of the Human Zygote
    • 2505 Words
    • 11 Pages

    Development of the Human Zygote

    are thought to have the potential to form any part of the fetus (Leese, Conaghan,…

    • 2505 Words
    • 11 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    The International Phonetic Alphabet
    • 454 Words
    • 2 Pages

    The International Phonetic Alphabet

    CONSONANTS (PULMONIC) Bilabial Labiodental Dental Plosive Nasal Trill Tap or Flap Fricative Lateral fricative Approximant Lateral approximant Alveolar Post alveolar Retroflex Palatal Velar Uvular © 2005 IPA Pharyngeal Glottal…

    • 454 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Amphibia
    • 3259 Words
    • 14 Pages

    Amphibia

    4. The upper jaw bears a row of closely set, small, uniform and hook like pointed maxillary teeth but the lower jaw lacks teeth.…

    • 3259 Words
    • 14 Pages
    Good Essays
    Read More
  • Good Essays

    Consonant Definition
    • 503 Words
    • 5 Pages

    Consonant Definition

    → stops /p t tʃ k b d dʒ g/ (+ nasals /m n ŋ/)…

    • 503 Words
    • 5 Pages
    Good Essays
    Read More

Related Topics