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    Related Topics

    From Musculoskeletal System

    Frontal Bone
    Bone forming the forehead and upper part of the orbits.
    Tarsals (7 bones)
    7 ankle bones.
    Zygomaticus
    Muscle that raises the corners of the mouth.
    Rectus Abdominis
    Abs muscle that flexes the trunk.
    Temporalis
    Muscle involved in closing the jaw.
    Abductor Digiti Minimi Muscle
    The abductor digiti minimi muscle is a hypothenar muscle that abducts and flexes the little finger, aiding grip and precision in hand movements.
    Sutures (in the skull)
    Fibrous joints between skull bones.
    Quadriceps
    Rectus Femoris, Vastus Medialis, Vastus Lateralis, Vastus Intermedius.
    Anterior Scalene Muscle
    The anterior scalene muscle is a deep neck muscle that elevates the first rib during inspiration and aids in neck flexion and stability, located between key neurovascular structures.
    Thoracic Cage
    Ribs and sternum forming the protective cage for the heart and lungs.
    Skull
    Bony structure of the head that encases the brain.
    Acromioclavicular Ligament
    Ligament that connects the acromion to the clavicle.
    Ulna
    Forearm bone on the pinky side.
    Pivot Joints
    e.g., atlanto-axial joint
    Pelvic Floor Muscles
    Muscles that support pelvic organs.
    Gastrocnemius
    Calf muscle responsible for plantarflexion of the foot.
    Ethmoid Bone
    Bone forming part of the nasal cavity and the orbit.
    Saddle Joints
    e.g., thumb joint
    Trapezius
    Muscle responsible for moving, rotating, and stabilizing the scapula.
    Hyoid Bone
    U-shaped bone in the neck that supports the tongue.
    Sternum
    Breastbone located in the center of the chest.
    Ball-and-Socket Joints
    e.g., shoulder, hip
    Phalanges (14 bones)
    14 bones forming the toes.
    Femur
    Thigh bone, the longest and strongest bone in the body.
    Patella
    Knee cap, protecting the knee joint.

    Facial Bones

    Reviewed by our medical team

    Bones forming the structure of the face.

    1. Overview

    The facial bones are a group of fourteen bones that form the skeleton of the face. These bones provide the structure and shape of the face, protect vital sensory organs, and serve as attachment sites for facial muscles. Unlike cranial bones, which primarily protect the brain, facial bones contribute to the formation of the orbits, nasal cavity, oral cavity, and jaw. Some of these bones are paired, while others are singular in the midline.

    2. Location

    Facial bones are located in the anterior and inferior parts of the skull, below the cranial cavity:

    • Superiorly: Articulate with the frontal bone of the cranium.

    • Inferiorly: Include the mandible, the only movable bone in the skull.

    • Laterally: Form the cheeks and parts of the eye sockets.

    • Medially: Form the nasal cavity and septum.

    3. Structure

    There are fourteen facial bones in total, which include:

    • Paired bones (right and left):

      • Maxillae: Form the upper jaw and part of the hard palate, nose, and orbit.

      • Zygomatic bones: Form the cheeks and part of the lateral orbital wall.

      • Nasal bones: Form the bridge of the nose.

      • Lacrimal bones: Small bones in the medial wall of the orbit; house the nasolacrimal duct.

      • Palatine bones: Form the posterior part of the hard palate and part of the nasal cavity and orbit.

      • Inferior nasal conchae: Scroll-like bones that project into the nasal cavity and help with airflow and humidification.

    • Unpaired bones:

      • Vomer: Forms the inferior portion of the nasal septum.

      • Mandible: The lower jawbone; the only movable facial bone, articulating with the temporal bone at the temporomandibular joint.

    These bones are connected by sutures, except for the mandible, which has a mobile synovial joint.

    4. Function

    Facial bones serve multiple structural and protective functions:

    • Support facial structures: Provide the framework for the face, including the nose, cheeks, and jaws.

    • Protect sensory organs: Surround and safeguard the eyes, nasal passages, and oral cavity.

    • Anchor muscles: Serve as attachment sites for facial expression, mastication, and speech-related muscles.

    • Facilitate eating and breathing: Form the upper and lower jaws, nasal cavity, and parts of the oral cavity.

    5. Physiological role(s)

    The facial bones contribute to several physiological processes:

    • Mastication: The maxilla and mandible support the teeth and enable chewing through their articulation and muscle attachments.

    • Respiration: The nasal bones, vomer, and inferior nasal conchae help form and regulate the nasal airway.

    • Vision and lacrimation: The zygomatic, lacrimal, and maxillary bones form the orbital socket and support the tear drainage system.

    • Speech and expression: The mandible and associated bones enable jaw movement for speech, while facial muscles attached to these bones allow for expressions and communication.

    • Growth and development: Facial bones grow and remodel during childhood and adolescence, influencing overall facial appearance and dental alignment.

    6. Clinical Significance

    Disorders and injuries involving facial bones have important clinical implications:

    • Fractures:

      • Common in trauma; zygomatic, nasal, and maxillary fractures can cause facial asymmetry, impaired vision, or airway obstruction.

      • Le Fort fractures involve patterns of maxillary fractures and are categorized into three types.

    • Temporomandibular joint (TMJ) dysfunction:

      • Results from malalignment or degeneration of the mandibular condyle and affects chewing and speaking.

    • Cleft palate and cleft lip:

      • Congenital anomalies of the maxilla and palatine bones causing oronasal communication and feeding difficulties.

    • Sinusitis:

      • Maxillary and ethmoidal sinuses within facial bones can become inflamed due to infection or allergy.

    • Orthodontic and surgical interventions:

      • Facial bones are frequently altered in reconstructive surgery, dental implants, and orthognathic procedures.

    Did you know? Your bones are constantly adapting to the mechanical forces placed on them.