Muscle Actions Flashcards by Wendy Lautner

Q

Frontalis

A

Raises eyebrows

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Q

Occipitalis Action

A

Retracts scalp

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Q

Orbicularis Oculi action

A

Close eyelids

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Q

Orbicularis Oris action

A

Closes mouth/puckers lips

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Q

Depressor Anguli Oris action

A

Frown

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Q

Depressor Labii Inferioris

A

Depresses lower lip

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Q

Levator Labii Superioris action

A

Elevates upper lip

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Q

Zygomaticus Major & Minor actions

A

Smile

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Q

Platysma

A

Tenses skin of neck

Depresses mandible

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Q

Buccinator

A

Compresses cheek

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Q

Masseter action

Origin

Insertion

A

A: Elevates mandible

O: Zygomatic arch

I: angle of mandibular ramus

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Q

TemporaliS action

Origin

Insertion

A

Elevates mandible

Squamous part of temporal bone

Coronoud process of mandible

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Q

Genioglossus action

Insertion

A

Protracts tongue

Tongue

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Q

Hyoglossus & Styloglossus action

Insertions

A

Retracts tongue

Side of tongue & side/base of tongue

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Q

Diagastric action

A

Depresses mandible

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Q

Omohyoid

Sternohyoid

Sternothyroid

action & insertions

A

Depresses hyoid

hyoid bone

Q

Stylohyoid action

A

Elevates thyroid cartilage

Q

Scalenes Main Action

A

Elevates ribs

Q

Scalenes reverse action

A

Flexion of neck

Lateral flexion of neck

Q

Diaphragm action

A

Expands thoracic cavity

Q

External intercostal

A

Elevates ribs (inspiration)

Q

Internal intercostal

A

Depresses ribs (expiration)

Q

Rectus abdominus

Origin

Insertion

action

A

O: pubic tubercle/pubic symphysis

I: xiphoid process

A: Flexion of torso

Depresses ribs

Q

External abdominal obliques

A

Flexion of torso

Lateral flexion of torso

Depression of ribs

Rotation of torso

Q

Internal abdominal obliques

Origin

Insertion

Action

A

O: iliac crest

I: ribs

A: Flexion of torso

Lateral flexion of torso

Depression of ribs

Rotation of torso

Q

Transverse Abdominus

A

Compresses abdomen (forced expiration)