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Muscle Origin, Insertion, Action
Anatomy Muscle Origin, Insertion, Action
8
Anatomy
Undergraduate 1
05/19/2010

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Cards

Term

Muscle of the scalp

Epicranius

(occipitofrontalis)

Bipartite muscle consisting of the frontalis and occipitalis muscles connected by a cranial aponeurosis, the galea aponeurotica; these two muscles pull scalp forward and backward

Definition
connected by a cranial aponeurosis, the galea aponeurotica; these two muscles pull scalp forward and backward
Term

Frontalis

Covers forehead and dome of skull; no bony attachments

Definition

O- galea aponeurotica

 

I-skin of eyebrows and root of nose

 

A-With aponeurosis fixed, raises the eyebrows (as in suprise); wrinkles forehead skin horizontally

Term

Occipitalis

Overlies posterior occiput; by pulling on the galea, fixes origin of frontalis

Definition

O- occipital and temporal bones

 

I- galea aponeurotica

 

A- Fixes aponeurosis and pulls scalp posteriorly

Term

Muscles of the face

 

Corrugator supercilii

Small muscle; activity associated with that of orbicularis oculi

Definition

O- arch of frontal bone above nosal bone

 

I- Skin of eyebrow

 

A- Draws eyebrows together and inferiorly; wrinkles skin of forehead vertically(as in frowning)

Term

Orvicularis oculi

Thin,tripartite sphincter muscle of eyelid; surronds rim of the orbit

Definition

O- frontal and maxillary bones and ligaments around orbit

 

I- tissue of eyelid

 

A- Protects eyes from intense light and injury

Term

Zygomaticus-major & minor

Muscle pair extending diagonally from cheek-boneto corner of mouth

Definition

O- zygomatic bone

 

I- skin and muscle at corner of mouth

 

A- Raises laterla corners of mouth upward (smiling muscle)

Term

Risorius

 

Slender muscle inferior and lateral to zygomaticus

Definition

O- lateral fascia associated with masseter muscle

 

I- skin at angle of mouth

 

A- Draws corner lip laterally;tenses lips;synergist of zygomaticus

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