Suprahyoid
What is the origin of the digastric muscle?
What is the origin of the omohyoid muscle?
Scapula
What two muscles share the same main action?
- Longus capitis
- Rectus capitis anterior
What is the superior attachment of the longus colli muscle?
- Anterior tubercle of vertebra C1
- Bodies of C1-C3 & transverse processes of C3-C6 vertebrae
What is the insertion of the masseter?
Lateral surface of ramus of mandible
What is the innervation of the mylohyoid muscle?
What three muscles have the same innervation?
- Omohyoid
- Sternohyoid
- Sternothyroid
What is the superior attachment of the rectus capitis anterior?
Base of cranium
What is the inferior attachment of the longus capitis muscle?
- Anterior tubercle of C3-C6 transverse processes
What is the main action of the temporalis on the mandible?
- Elevates mandible/closes jaw
- Horizontal fibers primary retractors of mandible
What is the origin of the geniohyoid muscle?
Anterior belly of mandible
What is the insertion of the sternothyroid muscle?
Thyroid cartilage
What four muscles make up the anterior prevertebral muscles?
- Longus colli
- Longus capitis
- Rectus capitis anterior
- anterior scalene
What is the main actions of the anterior scalene?
- Flexes neck laterally
- Elevates 1st rib during forced inspiration
What are the origins for the two heads of the lateral pterygoid muscle?
- Infratemporal surface & crest of greater wing
- Lateral surface of lateral pterygoid plate
What is the innervation of the stylohyoid muscle?
Fascial nerve
What two muscles have the same origin?
- Sternohyoid
- sternothyroid
What is the inferior attachment for the longus colli muscle?
- Bodies of C5-T3 vertebrae
- Transverse processes of C3-C5 vertebrae
What is the inferior attachment of the rectus capitis anterior?
Anterior surface of lateral mass of atlas (C1 vertebra)
What is the innervation of the medial pterygoid?
Main trunk of mandibular nerve via medial pterygoid nerve
What is the action of all four of these muscles?
Depress mandible against resistance when infrahyoid muscles fix/depress hyoid bone
What is the main action of all four of these muscles?
Fixes/depresses hyoid bone
What is the innervation of the rectus capitis anterior?
Branches from loop between C1 & C2 spinal nerves
What is the main action of the longus colli muscle?
What is the insertion of the temporalis muscle?
Coronoid process & anterior border of ramus of mandible