Structures

  • Longus colli
  • Longus capitis
  • Rectus capitis anterior
  • Sternocleidomastoid
MuscleActionOriginInsertionInnervationBlood supply
Longus Colli
- Superior oblique part
- Inferior oblique part
- Vertical part
- Flexion of neck
- Side flexion of neck
- Weak rotation of neck to opposite side
- Superior oblique: Anterior tubercles of transverse processes of C3-5
- Inferior oblique: Anterior bodies of T1-3
- Vertical: Anterior bodies of C5-T3
- Superior oblique: Tubercle of anterior arch of atlas
- Inferior oblique: Anterior tubercles of transverse processes of C5,6
- Vertical: Anterior bodies of C2-4
- Anterior rami of C2-6- Ascending cervical artery
Longus capitis- Flexes the neck- Tendons to transverse processes of C3-6- Inferior portion of basilar part of occiput- Anterior rami of C1-3- Ascending cervical artery
Rectus capitis anterior- Flexes neck at atlanto-occipital joint- Lateral part of atlas and its transverse process- Inferior portion of basilar part of occiput- Anterior rami of C1,2- Ascending cervical artery
Sternocleidomastoid - Rotates head to opposite side
- Sternal fibres extend head
- Clavicular fibres flex head.
- Sternal head: Manubrium of sternum
- Clavicular head: Superomedial clavicle
- Mastoid process
- Superior nuchal line
- Accesory nerve (cranial nerve XI)
- Anterior rami C2-4
- Occipital artery
- Superior thyroid artery
- Posterior auricular artery