The posterior surface of the scapula contains landmarks including the spine, acromion, and infraspinous fossa. These features provide attachment for muscles that stabilize and move the shoulder, such as the trapezius and infraspinatus. Knowledge of scapular anatomy is essential for View Diagram Bony Landmarks of the Posterior Surface of the Scapula
The rotatores muscles are small intrinsic back muscles that belong to the transversospinalis group. They extend from the transverse process of one vertebra to the lamina of the vertebra above. Although small, they play a role in stabilizing the spine View Diagram Rotatores Muscle of the Back
The adductor pollicis is a deep muscle in the hand, consisting of oblique and transverse heads. It functions primarily to adduct the thumb, bringing it toward the palm, and plays a vital role in precision grip and pinch strength. The View Diagram Deep Muscle of the Hand Adductor Pollicis
The internal oblique muscle is an important layer of the abdominal wall, located deep to the external oblique and superficial to the transversus abdominis. This anatomy diagram of the internal oblique highlights its origin from the iliac crest, inguinal ligament, View Diagram Abdominal Muscles Internal Oblique
The platysma is a superficial muscle of the neck embedded within the superficial cervical fascia. It extends from the lower jaw, covering the anterior neck, and inserts into the clavicle and upper thoracic region. The platysma functions to tense the View Diagram The Platysma Muscle Superficial Cervical Fascia
The erector spinae group, including iliocostalis, longissimus, and spinalis, extends along the vertebral column and supports posture, trunk extension, and lateral flexion. These muscles stabilize the spine during movement, lifting, or bending, and interact with deep core muscles to maintain View Diagram The Erector Spinae of the Back
The temporalis muscle is a fan-shaped muscle on the side of the skull. It originates from the temporal fossa and inserts onto the coronoid process of the mandible. It elevates and retracts the mandible, playing a key role in chewing. View Diagram Muscles of Mastication Temporalis
The deep layer of muscles in the posterior leg includes the tibialis posterior, flexor digitorum longus, and flexor hallucis longus. These muscles primarily function to plantarflex the foot and toes and provide stability to the medial and posterior aspects of View Diagram Muscles in the Deep Layer of the Posterior Leg
Muscles of the pelvic floor, including the levator ani and coccygeus, support pelvic organs, maintain continence, and contribute to core stability. They form the urogenital and anal diaphragms, integrating with connective tissue and neurovascular structures. Understanding their anatomy is essential View Diagram Muscles of the Pelvic Floor
The infrahyoid muscles of the neck, including sternohyoid, omohyoid, sternothyroid, and thyrohyoid, depress the hyoid and larynx during swallowing and speech. Lateral views reveal their attachments to the hyoid, sternum, and thyroid cartilage. Knowledge of infrahyoid anatomy is essential for View Diagram Lateral View of the Infrahyoid Muscles of the Neck
The first layer of plantar muscles includes abductor hallucis, flexor digitorum brevis, and abductor digiti minimi. These muscles lie just beneath the plantar fascia and play a role in maintaining the arches of the foot. Abductor hallucis moves the big View Diagram First Layer of Plantar Muscles
Muscles attaching to the pelvic body include the iliacus, psoas major, rectus abdominis, and pelvic floor muscles such as the levator ani. These muscles contribute to pelvic stability, posture, and locomotion, while also supporting pelvic organs. The iliopsoas muscles are View Diagram Muscles attaching to the Pelvic Body
The cricothyroid muscle is a small but very important muscle of the larynx. It connects the cricoid cartilage to the thyroid cartilage and works by tilting the thyroid cartilage forward. This movement stretches and tenses the vocal cords, which increases View Diagram Cricothyroid Muscle
The muscles of mastication include the medial and lateral pterygoids, which move the mandible for elevation, protrusion, and side-to-side motion. The medial pterygoid elevates and assists in grinding, while the lateral pterygoid protracts and depresses the mandible. They are innervated View Diagram Muscles of Mastication Medial and Lateral Pterygoids
The anterolateral abdominal wall muscles include external oblique, internal oblique, transversus abdominis, and rectus abdominis. They support abdominal contents and assist in trunk movement.
Finger movements include abduction and adduction, controlled by the dorsal and palmar interossei and lumbrical muscles. Abduction moves fingers away from the midline of the hand, while adduction brings them closer. These actions are essential for grip, precision tasks, and View Diagram Finger Abd Add
The abdominal muscles play a vital role in breathing, particularly during forced expiration. This anatomy diagram of abdominal breathing clearly illustrates how the diaphragm works in coordination with the abdominal wall to regulate airflow. During inspiration, the diaphragm contracts and View Diagram Abdominal in Breathing
The levator costarum muscles are small muscles located in the posterior thoracic region. They extend from the transverse processes of the vertebrae to the ribs below. Their primary function is to assist in elevating the ribs during inspiration. Although relatively View Diagram Levator Costarum Muscles of the Back
The anterior view of the suprahyoid muscles shows the digastric, mylohyoid, geniohyoid, and stylohyoid muscles. This anatomy diagram illustrates their function in elevating the hyoid bone and assisting in swallowing. It highlights their relationship to the mandible and tongue. Understanding View Diagram Anterior View of the Suprahyoid Muscles of the Neck
The dorsal layer of muscles refers to the posterior compartment of the body, including muscles of the back, upper limb, or leg depending on context. These muscles provide extension, rotation, and stabilization of the spine or limbs. In the back, View Diagram The Dorsal Layer of Muscles
