Muscles of the Abdomen Quiz: Test Your Anatomy Knowledge

Study Notes

Muscles of the Head and Neck

Cleidomastoid: Originates from the clavicle and inserts into the mastoid process, actions include turning and lowering the head.
Clavodeltoid: Originates from the clavicle and clavotrapezius, inserts into the ulna, and flexes the forearm.
Masseter: Originates from the zygomatic arch and inserts into the posterior half of the lateral surface of the mandible, elevating the lower jaw.
Temporalis: Originates from the superior nuchal line to the zygomatic process and inserts into the coronoid process of the mandible, elevating the lower jaw.
Digastric: Originates from the jugular and mastoid process, inserts into the mandible, and lowers the lower jaw.
Mylohyoid: Originates from the cricoid cartilage of the larynx and inserts into the hyoid bone, raising the floor of the mouth and pulling the hyoid forward.
Geniohyoid: Originates from the medial surface of the mandible near the symphysis and inserts near the symphysis, pulling the hyoid forward.
Thyrohyoid: Originates from the sternum and inserts into the thyroid cartilage, pulling the larynx posteriorly.
Sternothyroid: Originates from the thyroid cartilage and inserts into the posterior horn of the hyoid bone, pulling the hyoid posteriorly and raising the ribs and sternum.
Sternohyoid: Originates from the stylohyal bone of the hyoid and inserts into the thyroid cartilage, raising the hyoid.
Cricothyroid: Originates from the cricoid cartilage and inserts into the thyroid cartilage, tensing the vocal cords.

Muscles of the Upper Back, Shoulder, and Back of the Neck

Latissimus dorsi: Originates from the spines of thoracic and lumbar vertebrae and inserts into the intertubular groove of the humerus, pulling the arm dorsally and caudally.
Trapezius group:
- A.Spinotrapezius: Originates from the spine of thoracic vertebrae and spines of scapula, inserts into the spines of scapula, and pulls the scapula dorsally and caudally.
- B.Acromiotrapezius: Originates from the spines of cervical and thoracic vertebrae and inserts into the spine and metacromion process of the scapula, drawing the scapula dorsally and holding it together.
- C.Spinotrapezius: Originates from the superior nuchal line and inserts into the clavicle, drawing the clavicle dorsally and cranially.
Levator scapulae ventralis: Originates from the occipital bone and transverse process of atlas and inserts into the metacromion process and clavicle, drawing the scapula cranially.
Rhomboideus:
- A.Rhomboideus major: Originates from the neural spine of thoracic vertebrae and inserts into the vertebral border of the scapula, drawing the scapula dorsally and medially.
- B.Rhomboideus minor: Originates from the neural spines of thoracic vertebrae and inserts into the vertebral border of the scapula, drawing the scapula dorsally and medially.
- C.Rhomboideus capitis: Originates from the lamboidial ridge (superior nuchal line) and inserts into the vertebral border of the scapula, drawing the scapula cranially and rotating it.
Splenius: Originates from the neural spines of thoracic vertebrae and inserts into the lamboidal ridge, turning and raising the head.
Supraspinatus: Originates from the supraspinous fossa of the scapula and inserts into the greater tuberosity of the humerus, extending the humerus.
Acromiodeltoid: Originates from the acromion process of the scapula and inserts into the deltoid ridge of the humerus, flexing and rotating the humerus.
Spinodeltoid: Originates from the spine of the scapula and inserts into the deltoid ridge of the humerus, flexing and rotating the humerus.
Infraspinatus: Originates from the infraspinous fossa of the scapula and inserts into the deltoid ridge of the humerus, flexing and rotating the humerus.

Abdominal Muscles

External Oblique: Originates from the lumbodorsal fascia and inserts into the sternum and costal cartilages, compressing the abdomen.
Internal Oblique: Originates from the lumbodorsal fascia and inserts into the linea alba, compressing the abdomen.
Transverse abdominis: Originates from the lumbodorsal fascia and inserts into the linea alba, compressing the abdomen.
Rectus Abdominis: Originates from the pubic symphysis and inserts into the sternum and costal cartilages, compressing the abdomen.

Muscles of the Neck and Throat

Pectoantebrachialis: Originates from the manubrium and inserts into the fascia of the forearm, drawing the arm toward the chest.
Pectoralis major: Originates from the sternum and median, ventral raphe and inserts into the humerus, drawing the arm toward the chest.
Xiphihumeralis: Originates from the xiphoid process and inserts into the humerus, drawing the arm toward the chest.
Sternomastoid: Originates from the median raphe and manubrium and inserts into the skull from the lambdoid ridge to the mastoid process.

Description

Test your knowledge of the external oblique, internal oblique, transverse abdominis, and rectus abdominis muscles including their origins, insertions, and actions. Identify the correct muscle based on the given information.