Test 2 Tongue, Jaw, Eyes, Front Of Neck Flashcards
Inferior rectus
Origin: common tendinous ring
Insertion: inferior and central part of eyeballs
Action: moves eyeballs inferiorly and Medially (looking down an towards midline)
Innervation: oculomotor 3 nerve
Superior rectus
Orgin: common tendinous ring
Insertion: superior and central part of eyeballs
Action: moves eyeballs superiorly and medially
Innervation: oculomotor (3) nerve
Lateral rectus
Origin: common tendinous ring
Insertion: lateral side of eyeballs
Action: moves eyeballs laterally (abduction)
Innervation: abducens (6) nerve
Medial Rectus
Origin: common tendinous ring
Insertion: medial side of eyeballs
Action: moves eyeballs medially (adduction)
Innervation: oculomotor (3) nerve
Superior oblique
Orgin: sphenoid bone, superior and medial to the common tendinous ring in orbit
Insertion; eyeball between superior and lateral recti.
Action: moves eyeballs inferiorly (downward) and laterally (abduction)
Innervation: trochlear (4) nerve
Inferior oblique
Origin: maxilla in floor of orbit
Insertion: eyeballs between inferior and lateral recti
Action: moves eyeballs superiorly and laterally (abduction)
Innervation: oculomotor (3) nerve
Levator palpebrae superioris
Origin: roof of orbit
Insertion: skin and tarsal plate of upper eyelids
Action: elevates upper eyelids
Innervation: oculomotor (3) nerve
Masseter
Origin: Maxilla and zygomatic arch
Insertion: angle and ramus of mandible
Action: elevates mandible (closing mouth)
Innervation: cranial nerve 5
Temporalis
Orgin: temporal bone
Insertion: coroniod process and ramus of mandible
Action: elevates and retracts mandible (brings back)
Innervation: cranial nerve 5
Medial pterygoid
Origin:medial surface of lateral portion of pterygoid process of sphenoid bone; maxilla
Insertion: angle and ramus of mandible
Action: Elevates and protracts mandible from side to side
Innervation: cranial nerve 5
Lateral pterygoid
Orgin: greater wing and lateral surface of lateral portion of pterygoid process of sphenoid bone
Insertion: condyle of mandible, tmj
Action: protracts mandible, depresses mandible as in opening mouth and moves mandible side to side
Innervation: cranial nerve 5
Genioglossus
Origin:mandible
Insertion: undersurface of tongue and hyoid bone
Action: depresses tongue and thrust it anteriorly (protraction)
Styoglossus
Origin: styloid process of temporal bone
Insertion: side and undersurface of tongue
Action: elevates tongue and draws it posteriorly (retraction
Hyglossus
Origin: greater horn and body of hyoid bone
Insertion: side of tongue
Action: depresses tongue and draws its sides
Palatoglossus
Origin: anterior surface of soft palate
Insertion: side of tongue
Action: elevates posterior portion of tongue and draws soft palate down on tongue
Digastric
Origin: anterior belly from inner side of inferior border of mandible; posterior belly from temporal bone
Insertion: body of hyoid bone via an intermediate tendon
Action: elevates hyoid bone. RMA: (reverse muscle action) depresses mandible as in opening mouth
Innervation: for anterior is 5 and post is 7
Stylohyoid
Origin: styloid process
Insertion: body of hyoid bone
Action: elevates hyoid bone and draws it posteriorly
Mylohyoid
Origin: inner surface of mandible
Insertion: body of hyoid bone
Action: elevates hyoid bone, draws hyoid bone and floor of mouth depress mandible
Geniohyoid
Origin: inner surface of mandible
Insertion: body of hyoid
Action: elevates hyoid bone, draws hyoid and tongue anteriorly, depresses mandible
Omohyoid
Origin: superior border of scapula and superior transverse ligenment
Insertion: body of hyoid bone
Action: depresses hyoid bone
Sternohyoid
Origin:Medial end of clavicle and manubrium of sternum
Insertion: body of hyoid bone
Action: depresses hyoid bone
Sternothyroid
Origin: manubrium of sternum
Insertion: thyroid cartilage of larynx
Action: depresses thyroid cartilage of larynx
Thyrohypid
Origin: thyroid cartilage of larynx
Insertion: greater horn of hyoid bone
Action: depresses hyoid bone
