Head and Neck Muscles Quiz

Head and Neck Muscles

• Sternocleidomastoid

  • Originates from the sternum and clavicle
  • Inserts into the mastoid process
  • Unilateral action: Ipsilateral neck flexion and contralateral neck rotation
  • Bilateral action: Neck flexion

• Scalenes

  • Originates from the cervical vertebrae
  • Inserts into ribs 1-2
  • Unilateral action: Ipsilateral neck flexion
  • Bilateral action: Neck flexion and aids in respiration

• Splenius Capitis

  • Originates from the lower cervical spine and upper thoracic spine
  • Inserts into the occipital bone and cervical vertebrae
  • Unilateral action: Ipsilateral neck extension
  • Bilateral action: Neck extension

• Upper Trapezius

  • Originates from the spinous processes of the cervical spine
  • Inserts into the occipital bone, clavicle
  • Unilateral action: Ipsilateral neck extension
  • Bilateral action: Neck extension

Trunk Muscles

• External Oblique

  • Originates from lower ribs
  • Inserts into the anterior iliac crest and pubic symphysis
  • Unilateral action: Contralateral trunk rotation
  • Bilateral action: Stabilizes viscera and aids in trunk flexion

• Internal Oblique

  • Originates from the iliac crest
  • Inserts into the lower ribs, costal cartilage, and pubis
  • Unilateral action: Ipsilateral trunk rotation
  • Bilateral action: Stabilizes viscera and aids in trunk lateral flexion

• Transverse Abdominis

  • Originates from the iliac crest and inguinal ligament
  • Inserts into the linea alba, pubis, and abdominal connective tissue
  • Bilateral action: Compresses and stabilizes visceral organs

• Rectus Abdominis

  • Originates from the pubic symphysis
  • Inserts into the xiphoid process and costal cartilage
  • Bilateral action: Forward trunk flexion, stabilizes viscera, and stabilizes pelvic floor

• Erector Spinae

  • Originates from the nuchal ligament, ribs, sacrum, and lumbar spine
  • Inserts into the mastoid process, ribs, cervical and thoracic spine
  • Unilateral action: Ipsilateral trunk flexion
  • Bilateral action: Trunk extension and posture

• Quadratus Lumborum

  • Originates from the iliac crest
  • Inserts into rib 12 and the lumbar spine
  • Unilateral action: Ipsilateral trunk flexion
  • Bilateral action: Lumbar spine extension

Test your knowledge of the anatomy and functions of head and neck muscles, including the sternocleidomastoid, scalenes, and others. This quiz will cover origin, insertion, and actions of these essential muscles for movement and respiration.