Head Muscles

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Last updated 1:25 AM on 10/15/26
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10 Terms

1
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Superior Rectus

Action- elevate and adduct eye

Nerve- oculomotor (CN 3)

2
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Inferior Rectus

Action- depress and adduct eye

Nerve- oculomotor (CN 3)

3
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Medial Rectus

Action- adducts the eye

Nerve- oculomotor (CN 3)

4
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Lateral Rectus

Action- abducts the eye

Nerve- abducens (CN 6)

5
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Superior Oblique

Action- abducts, depresses, and internally rotates the eye (down and out)

Nerve- trochlear (CN 4)

6
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Infertior Oblique

Action- abducts, elevates, and externally rotates the eye (up and out)

Nerve- oculomotor (CN3)

7
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Temporalis

Action- elevate and retract mandible (closes jaw)

Nerve- mandibular (CN V3)

8
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Masseter

Action- elevate and retract mandible (closes jaw)

Nerve- mandibular (CN V3)

9
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Lateral Pterygoid

Action- bilateral contraction: depresses mandible (opens jaw) unilateral contraction: moves mandible medially

Nerve- mandibular (CN V3)

10
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Medial Pterygoid

Action- bilateral contraction: elevates the mandible (closes jaw), unilateral contraction: moves mandible medially

Nerve- mandibular (CN V3)